Download MAX2058 700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer General Description

19-0512; Rev 0; 6/06
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
Features
The MAX2058 high-linearity digital-variable-gain amplifier (DVGA) is designed to provide 62dB of total gain
range and typical output IP3 and output P1dB levels of
+32.3dBm and +19dBm, respectively. The device is
ideal for a variety of applications, including RFID handheld and portal readers, as well as single and multicarrier 700MHz to 1200MHz GSM/EDGE, cdma2000 ®,
WCDMA, and iDEN ® base stations. The MAX2058
yields a high level of component integration, which
includes two 5-bit, 31dB digital attenuators, a two-stage
driver amplifier, a loopback mixer, and a serial interface
to control the attenuators.
The MAX2058 is pin compatible with the MAX2059
1800MHz to 2200MHz DVGA, facilitating an easy
design-in for applications where a common PC board
layout is used for both frequency bands.
The MAX2058 is available in a 40-pin thin QFN package with an exposed paddle. Electrical performance is
guaranteed over a -40°C to +85°C temperature range.
♦ +32.3dBm Typical Output IP3
Applications
♦ Lead-Free Package Available
♦ +19dBm Typical Output 1dB Compression Point
♦ 700MHz to 1200MHz RF Frequency Range
♦ 1800MHz to 2200MHz RF Frequency Range
(MAX2059)
♦ 10.5dB Typical Small-Signal Gain
♦ Includes Two Independent 31dB Attenuator
Stages, Yielding 62dB of Total Gain-Control
Range with 1dB Steps
♦ 3-Wire SPI™/MICROWIRE™-Compatible
♦ Integrated Loopback Mixer for Tx/Rx SelfDiagnostics
♦ +5V Single-Supply Operation
♦ External Current-Setting Resistors for Scalable
Device Power
GSM 850/GSM 900 2G and 2.5G EDGE BaseStation Transmitters and Power Amplifiers
Cellular cdmaOne™, cdma2000, and Integrated
Digital Enhanced Network (iDEN) Base-Station
Transmitters and Power Amplifiers
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
PKG
CODE
WCDMA 850MHz and Other 3G Base-Station
Transmitters and Power Amplifiers
MAX2058ETL
-40°C to +85°C
40 Thin QFN-EP**
T4066-3
(6mm x 6mm)
Transmitter Gain Control
MAX2058ETL-T
-40°C to +85°C
40 Thin QFN-EP**
T4066-3
(6mm x 6mm)
MAX2058ETL+
-40°C to +85°C
40 Thin QFN-EP**
T4066-3
(6mm x 6mm)
MAX2058ETL+T -40°C to +85°C
40 Thin QFN-EP**
T4066-3
(6mm x 6mm)
Receiver Gain Control
Broadband Systems
Automatic Test Equipment
Digital and Spread-Spectrum Communication
Systems
Microwave Terrestrial Links
RFID Handheld and Portal Readers
**EP = Exposed paddle.
+Denotes lead-free package.
T = Tape-and-reel.
Pin Configuration/Functional Diagram appears at end of data
sheet.
SPI is a trademark of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
iDEN is a registered trademark of Motorola, Inc.
cdmaOne is a trademark of CDMA Development Group.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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1
MAX2058
General Description
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +5.5V
RSET1, RSET2......................................................+1.2V to +4.0V
LBBIAS .......................................................(VCC - 1.5V) to +5.5V
LB_EN, DATA, CS, CLK .............................-0.3V to (VCC + 0.3V)
ATTEN_INA, ATTEN_INB, ATTEN_OUTA, ATTEN_OUTB
Input Power .................................................................+24dBm
AMPIN, Differential LO Input Power ...............................+12dBm
Continuous Power Dissipation (TA = +70°C)
40-Pin TQFN (derated 26.3mW/°C above +70°C) ......2100mW
Operating Temperature Range (Note A) .............-40°C to +85°C
Junction Temperature ......................................................+150°C
θJC ....................................................................................10°C/W
θJA ....................................................................................38°C/W
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note A: TC is the temperature on the exposed paddle of the package.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, R1 = 1.2kΩ, R2 = 3.92kΩ, R3 = 2kΩ, TC = -40°C to +85°C. Typical
values are at VCC = +5.0V and TC = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
Supply Voltage
VCC
Total Supply Current
ICC
CONDITIONS
MIN
TYP
MAX
UNITS
4.75
5.0
5.25
V
LB mixer disabled (LB_EN = 1)
134
156
LB mixer enabled (LB_EN = 0)
158
186
Reference to VCC, VCCLB, VCCLOGIC,
VCCBIAS1, VCCBIAS2, VCCAMP
mA
LOGIC INPUTS (DATA, CS, CLK, LB_EN)
Input High Voltage
VIH
Input Low Voltage
VIL
2.4
V
Input Current with Logic-High
IIH
0.01
µA
Input Current with Logic-Low
IIL
0.01
µA
0.8
V
AC ELECTRICAL CHARACTERISTICS
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,
40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO =
45MHz, fLBOUT = fRF - fLO, and TC = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
RF Frequency (Note 2)
Small-Signal Gain
AV
POUT
Output Power Flatness
2
MAX
MAX2059
1800
2200
fRF = 940MHz, TC = +25°C
8.4
10.5
TC = -40°C to +25°C
-0.014
TC = +25°C to +85°C
-0.021
PIN = 0dBm, fRF = 940MHz, TC = +25°C
PIN = 0dBm
OIP3
TYP
1200
8.4
10.5
800MHz to 900MHz
0.13
900MHz to 1000MHz
-0.52
Attenuation Range
Output Third-Order Intercept
Point
MIN
700
All attenuation
settings
Gain Variation vs. Temperature
Output Power
CONDITIONS
MAX2058
Two tones: fRF1 = 940MHz, fRF2 = 941MHz,
POUT1 = POUT2 = +5dBm
12.8
UNITS
MHz
dB
dB/°C
12.8
dBm
dB
62
dB
32.3
dBm
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700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,
40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO =
45MHz, fLBOUT = fRF - fLO, and TC = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Output -1dB Compression Point
(Note 3)
RMS Error Vector Magnitude
SYMBOL
OP1dB
EVM
Spurious Emissions in 30kHz
Bandwidth (Note 4)
Noise Figure
CONDITIONS
POUT = +12dBm, EDGE modulation
POUT = +12dBm,
EDGE modulation
MIN
TYP
UNITS
19
dBm
0.5
%
200kHz offset
-39.2
400kHz offset
-73.5
600kHz offset
-82.7
1.2MHz offset
-85.7
NF
MAX
dBc
6.8
dB
Input Return Loss
50Ω source, minimum attenuation setting
18
dB
Output Return Loss
50Ω load, minimum attenuation setting
20
dB
Attenuator measured separately ZS = ZL =
50Ω
3.3
dB
Attenuator measured separately ZS = ZL =
50Ω, two tones: fRF1 = 940MHz, fRF2 =
941MHz, PIN1 = PIN2 = +5dBm
44
dBm
31
dB
5-BIT DIGITAL ATTENUATORS
Insertion Loss
Input Third-Order Intercept Point
IIP3
Control Range
Attenuation Step Size Variation
vs. Frequency
Attenuation Variation vs.
Temperature
800MHz to 900MHz
±0.08
900MHz to 1000MHz
±0.06
800MHz to 1000MHz,
TC = -40°C to +25°C
±0.002
800MHz to 1000MHz,
TC = +25°C to +85°C
±0.003
Step Size
dB
dB/°C
1
-0.2
+0.4
-0.2
+0.5
dB
Relative Step Accuracy
800MHz to 1000MHz
dB
Absolute Step Accuracy
800MHz to 1000MHz
Spurious Emissions in 300kHz
Bandwidth (Note 5)
No RF input, attenuator A stepped from 0 to
2dB, 7dB to 9dB, 15dB to 17dB, 0 to 31dB,
31dB to 0dB, with attenuator B at 0dB;
attenuator B stepped from 0 to 2dB, 7dB to
9dB, 15dB to 17dB, 0 to 31dB, 31dB to
0dB, with attenuator A at 0dB
-85
dBm
Switching Speed
From chip select transitioning high to the
output settling to within 1dB of steady state
output
0.3
µs
dB
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3
MAX2058
AC ELECTRICAL CHARACTERISTICS (continued)
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,
40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO =
45MHz, fLBOUT = fRF - fLO, and TC = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
100
MHz
LOOPBACK MIXER
LO Frequency (Note 2)
fLO
LO Input Power
PLO
40
Output Power (Note 6)
PIN = +5dBm, fRF = 940MHz, TC = +25°C
Gain Accuracy
PIN = +5dBm, TC
= -40°C to +25°C
Output Third-Order Intercept
Point (Note 6)
OIP3
Output Noise Floor
ON/OFF Switching Time
ATTEN_OUTB to LBOUT Isolation
Output Return Loss
LO Port Return Loss
-6
0
dBm
-12.7
-10.8
dBm
800MHz to 900MHz
±1.7
900MHz to 1000MHz
±1.7
dB
Two tones: fRF1 = 940MHz, fRF2 = 940.2MHz,
PIN1 = PIN2 = +2dBm, TC = +25°C
10.6
dBm
PIN = +5dBm
-137
dBc/Hz
LB_EN enable time
0.12
LB_EN disable time
0.12
Mixer enabled, attenuators A and B both set
to 31dB, PIN = +5dBm
LBOUT to ATTEN_OUTB Isolation
-14.7
µs
67
dB
dB
Mixer disabled, PIN = 0dBm
50
Mixer enabled, 50Ω load
22
Mixer disabled, 50Ω load
23
50Ω source
32
dB
38
MHz
dB
SERIAL PERIPHERAL INTERFACE (SPI)
Maximum Clock Speed
Data to Clock Setup Time
tCS
1
ns
Data to Clock Hold Time
tCH
9
ns
Clock to CS Setup Time
tES
4
ns
CS Positive Pulse Width
tEW
18
ns
CS Negative Pulse Width
tEWN
24
ns
CLOCK Pulse Width
tCW
13
ns
Note 1: All limits include external component losses. Output measurements taken at RFOUT or LBOUT ports of the Typical
Application Circuit.
Note 2: Operating outside this range is possible, but with degraded performance of some parameters.
Note 3: Compression point characterized. It is advisable not to continuously operate the VGA RF input above +15dBm.
Note 4: Input RF source contribution to spurious emissions (Agilent ESG 4435B, PSA E4443A): 200kHz = -39.2dBc,
400kHz = -73.5dBc, 600kHz = -83.2dBc, 1.2MHz = -85.7dBc
Note 5: No SPI clock input applied.
Note 6: Guaranteed by design and characterization.
4
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700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
TC = -40°C
12
9
TC = +25°C
10
VCC = 5.0V
9
VCC = 4.75V
8
TC = +85°C
7
-5
-15
7
-25
6
900
1000
1100
RF FREQUENCY (MHz)
1200
700
900
1000
1100
700
1200
MAX2058 toc04
1.0
5
GAIN (dB)
ERROR (dB)
-0.5
0
-25
-1.0
900
1000
1100
RF FREQUENCY (MHz)
1200
700
ATTEN B ABS ACCURACY vs. RF FREQUENCY
700
1200
800
900
1000
1100
RF FREQUENCY (MHz)
1200
OUTPUT IP3 vs. RF FREQUENCY
ATTEN B REL ACCURACY vs. RF FREQUENCY
34
TC = +5°C TC = -40°C
33
0
-0.5
OUTPUT IP3 (dBm)
0.5
ERROR (dB)
0.5
-1.0
700
900
1000
1100
RF FREQUENCY (MHz)
1.0
MAX2058 toc07
1.0
800
MAX2058 toc08
800
-5
-15
-0.5
-1.0
1200
15
0.5
0
900
1000
1100
RF FREQUENCY (MHz)
GAIN vs. RF FREQUENCY
ADJUSTING ATTEN B
ATTEN A REL ACCURACY vs. RF FREQUENCY
0.5
700
800
RF FREQUENCY (MHz)
ATTEN A ABS ACCURACY vs. RF FREQUENCY
1.0
800
MAX2058 toc06
800
MAX2058 toc05
700
MAX2058 toc09
6
ERROR (dB)
5
GAIN (dB)
10
8
ERROR (dB)
VCC = 5.25V
11
GAIN (dB)
GAIN (dB)
11
15
MAX2058 toc03
12
13
MAX2058 toc02
TC = +5°C
MAX2058 toc01
13
0
-0.5
900
1000
1100
RF FREQUENCY (MHz)
1200
31
TC = +25°C
TC = +85°C
30
29
-1.0
800
32
700
800
900
1000
1100
RF FREQUENCY (MHz)
1200
800
850
900
950
RF FREQUENCY (MHz)
1000
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5
MAX2058
Typical Operating Characteristics
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,
40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC = +25°C, unless otherwise noted.)
GAIN vs. RF FREQUENCY
GAIN vs. RF FREQUENCY
GAIN vs. RF FREQUENCY
(MAXIMUM GAIN)
ADJUSTING ATTEN A
(MAXIMUM GAIN)
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,
40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC = +25°C, unless otherwise noted.)
TC = +85°C
9
TC = +25°C
10
MAX2058 toc12
MAX2058 toc10
VCC = 5.25V
33
NOISE FIGURE vs. RF FREQUENCY
NOISE FIGURE vs. RF FREQUENCY
10
MAX2058 toc11
OUTPUT IP3 vs. RF FREQUENCY
34
9
32
31
VCC = 5.0V
VCC = 4.75V
30
NOISE FIGURE (dB)
NOISE FIGURE (dB)
OUTPUT IP3 (dBm)
VCC = 5.25V
8
7
6
VCC = 5.0V
7
6
VCC = 4.75V
TC = +5°C
5
8
5
TC = -40°C
4
4
1000
700
OUTPUT P1dB vs. RF FREQUENCY
21
TC = -40°C
TC = +5°C
22
21
VCC = 5.25V
18
TC = +25°C
16
19
18
VCC = 5.0V
17
VCC = 4.75V
16
TC = +85°C
15
15
14
14
800
900
1000
1100
RF FREQUENCY (MHz)
0
5
0dB
4dB
2dB
10
15
20
25
16dB, 31dB
900
1000
1100
RF FREQUENCY (MHz)
1200
700
0
OUTPUT RETURN LOSS (dB)
MAX2058 toc16
5
10
31dB
15
20
0dB, 1dB
900
1000
1100
RF FREQUENCY (MHz)
700
1200
OUTPUT RETURN LOSS vs. RF FREQUENCY
ATTEN A VARIED
INPUT RETURN LOSS vs. RF FREQUENCY
ATTEN B VARIED
0
800
10
31dB
20
30
800
700
6
800
900
1000
1100
RF FREQUENCY (MHz)
1200
16dB, 31dB
4dB
20
30
2dB
800
900
1000
1100
RF FREQUENCY (MHz)
1200
8dB
0dB
1dB
40
700
1200
10
0dB
40
900
1000
1100
RF FREQUENCY (MHz)
0
25
30
1dB
OUTPUT RETURN LOSS vs. RF FREQUENCY
ATTEN B VARIED
OUTPUT RETURN LOSS (dB)
800
8dB
30
MAX2058 toc17
700
1200
INPUT RETURN LOSS vs. RF FREQUENCY
ATTEN A VARIED
INPUT RETURN LOSS (dB)
19
17
700
1200
20
OUTPUT P1dB (dBm)
20
OUTPUT P1dB (dBm)
900
1000
1100
RF FREQUENCY (MHz)
OUTPUT P1dB vs. RF FREQUENCY
MAX2058 toc13
22
800
MAX2058 toc15
850
900
950
RF FREQUENCY (MHz)
MAX2058 toc14
800
MAX2058 toc18
29
INPUT RETURN LOSS (dB)
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
700
800
900
1000
1100
RF FREQUENCY (MHz)
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1200
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
-60
ATTEN A, 31dB
-70
18
17
16
15
800
900
1000
1100
RF FREQUENCY (MHz)
800
MIXER CONV LOSS vs. RF FREQUENCY
VCC = 5.0V
800
1000
TC = +5°C
TC = -40°C
12
850
900
950
RF FREQUENCY (MHz)
1000
MIXER OUTPUT IP3 vs. RF FREQUENCY
13
VCC = 5.25V
12
PLO = -6dBm
17
16
OUTPUT IP3 (dBm)
PLO = -3dBm
18
11
10
9
TC = +25°C
11
10
VCC = 4.75V
VCC = 5.0V
9
PLO = 0dBm
8
14
8
TC = +85°C
7
7
1000
800
11
10
PLO = -6dBm
PLO = 0dBm
9
0
MIXER OUT RETURN LOSS (dB)
12
MAX2058 toc25
PLO = -3dBm, 0dBm
TC = +5°C
TC = -40°C
20
30
TC = +85°C
850
900
950
RF FREQUENCY (MHz)
1000
1000
0
10
20
30
TC = +25°C
VCC = 4.75V, 5.0V, 5.25V
40
40
7
850
900
950
RF FREQUENCY (MHz)
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER ENABLED)
10
8
800
800
1000
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER ENABLED)
MIXER OUTPUT IP3 vs. RF FREQUENCY
13
850
900
950
RF FREQUENCY (MHz)
MIXER OUT RETURN LOSS (dB)
850
900
950
RF FREQUENCY (MHz)
MAX2058 toc26
800
MAX2058 toc27
15
OUTPUT IP3 (dBm)
VCC = 5.25V
16
MIXER OUTPUT IP3 vs. RF FREQUENCY
OUTPUT IP3 (dBm)
CONVERSION LOSS (dB)
19
850
900
950
RF FREQUENCY (MHz)
13
MAX2058 toc22
20
17
14
14
1200
VCC = 4.75V
18
15
MAX2058 toc23
700
19
TC = -40°C
TC = +5°C
ATTEN B, 31dB
MAX2058 toc21
TC = +25°C
CONVERSION LOSS (dB)
-50
20
MAX2058 toc20
TC = +85°C
19
CONVERSION LOSS (dB)
ATTEN A AND B, 0dB
GAIN (dB)
20
MAX2058 toc19
-40
-80
MIXER CONV LOSS vs. RF FREQUENCY
MIXER CONV LOSS vs. RF FREQUENCY
-30
MAX2058 toc24
REVERSE GAIN vs. RF FREQUENCY
ADJUSTING ATTEN A AND B
700
800
900
1000
1100
RF FREQUENCY (MHz)
1200
700
800
900
1000
1100
RF FREQUENCY (MHz)
1200
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7
MAX2058
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,
40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,
40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC = +25°C, unless otherwise noted.)
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER DISABLED)
20
30
VCC = 4.75V, 5.0V, 5.25V
20
900
1000
1100
RF FREQUENCY (MHz)
TC = -40°C
40
700
1200
900
1000
1100
RF FREQUENCY (MHz)
0
1200
-10
VCC = 4.75V, 5.0V, 5.25V
GAIN (dB)
-10
20
-20
-40
-40
100
150
200
700
800
900
1000
1100
300
1200
350
400
450
500
550
LO FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
ATTEN A ONLY
ABS ACCURACY vs. RF FREQUENCY
ATTEN A ONLY
ABS ACCURACY vs. RF FREQUENCY
(NMT 450MHz BAND)
ATTEN A ONLY
REL ACCURACY vs. RF FREQUENCY
1.0
0.5
0.5
ERROR (dB)
1.0
0
0.5
0
-0.5
-0.5
-1.0
-1.0
-1.5
-1.5
800
900
1000
RF FREQUENCY (MHz)
1100
1200
0
-0.5
-1.0
-2.0
-2.0
MAX2058 toc36
1.5
ERROR (dB)
1.5
1.0
MAX2058 toc35
2.0
MAX2058 toc34
2.0
700
-20
-30
-30
40
200
0
MAX2058 toc32
MAX2058 toc31
10
50
100
150
LO FREQUENCY (MHz)
ATTEN A ONLY
GAIN vs. RF FREQUENCY
(NMT 450MHz BAND)
0
30
8
800
ATTEN A ONLY
GAIN vs. RF FREQUENCY
GAIN (dB)
LO RETURN LOSS (dB)
0
50
TC = +25°C
TC = +5°C
LO RETURN LOSS vs. LO FREQUENCY
(MIXER ENABLED)
0
TC = +85°C
20
30
30
40
800
10
TC = +25°C
40
700
MAX2058 toc30
MAX2058 toc29
10
MAX2058 toc33
TC = +85°C
0
LO RETURN LOSS (dB)
TC = -40°C
0
MIXER OUT RETURN LOSS (dB)
10
TC = +5°C
LO RETURN LOSS vs. LO FREQUENCY
(MIXER ENABLED)
MIXER OUTPUT RETURN LOSS
vs. RF FREQUENCY (MIXER DISABLED)
MAX2058 toc28
MIXER OUT RETURN LOSS (dB)
0
ERROR (dB)
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
300
350
400
450
RF FREQUENCY (MHz)
500
550
700
800
900
1000
RF FREQUENCY (MHz)
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1100
1200
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
GAIN (dB)
GAIN (dB)
0
-20
-40
-40
-1.0
400
450
500
700
550
800
900
1000
1100
300
1200
350
500
550
2.0
1.5
1.0
1.0
0.5
0.5
0
MAX2058 toc41
1.5
450
ATTEN B ONLY
ABS ACCURACY vs. RF FREQUENCY
(NMT 450MHz BAND)
ATTEN B ONLY
ABS ACCURACY vs. RF FREQUENCY
2.0
400
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
ERROR (dB)
350
MAX2058 toc40
300
-20
-30
-30
-0.5
ERROR (dB)
ERROR (dB)
-10
-10
0.5
ATTEN B ONLY
GAIN vs. RF FREQUENCY
(NMT 450MHz BAND)
0
MAX2058 toc38
0
MAX2058 toc37
1.0
ATTEN B ONLY
GAIN vs. RF FREQUENCY
MAX2058 toc39
ATTEN A ONLY
REL ACCURACY vs. RF FREQUENCY
(NMT 450MHz BAND)
0
-0.5
-0.5
-1.0
-1.0
-1.5
-1.5
-2.0
-2.0
700
800
900
1000
RF FREQUENCY (MHz)
1100
1200
300
350
400
450
500
550
RF FREQUENCY (MHz)
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9
MAX2058
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,
40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz ≤ fRF ≤ 1200MHz,
40MHz ≤ fLO ≤ 100MHz, TC = -40°C to +85°C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT =
fRF - fLO, and TC = +25°C, unless otherwise noted.)
ATTEN B ONLY
REL ACCURACY vs. RF FREQUENCY
(NMT 450MHz BAND)
ATTEN B ONLY
REL ACCURACY vs. RF FREQUENCY
0.5
ERROR (dB)
0
-0.5
-0.5
-1.0
-1.0
700
800
900
1000
1100
1200
300
350
400
450
500
550
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(MIXER DISABLED)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(MIXER ENABLED)
TC = +85°C
130
110
4.750
TC = +25°C
4.875
TC = +5°C
170
SUPPLY CURRENT (mA)
140
120
180
MAX2058 toc44
150
10
0
TC = -40°C
TC = +85°C
MAX2058 toc45
ERROR (dB)
0.5
MAX2058 toc43
1.0
MAX2058 toc42
1.0
SUPPLY CURRENT (mA)
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
TC = +25°C
160
150
TC = +5°C
TC = -40°C
140
5.000
VCC (V)
5.125
5.250
130
4.750
4.875
5.000
VCC (V)
5.125
5.250
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700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
PIN
NAME
1
LO+
2
LO-
FUNCTION
Loopback Mixer Local Oscillator Positive Input
Loopback Mixer Local Oscillator Negative Input
Loopback Mixer Supply Voltage. +5V supply for the internal loopback mixer. Bypass to GND with
100pF and 0.1µF capacitors as close as possible to the pin.
3
VCCLB
4
LBOUT
Loopback Mixer RF Output. Internally matched to 50Ω. AC-couple with a capacitor.
5
LB_EN
Loopback Mixer Logic Input. Set to logic-low 0 to enable the mixer. Set to logic-high 1 to disable the mixer.
6
DATA
SPI Digital Data Input
7
CLK
SPI Clock Input
8
CS
SPI Chip-Select Input
9
VCCLOGIC
10, 11, 13,
14, 16, 17,
19, 22, 24,
25, 26, 30,
32, 34, 35,
37, 38
GND
12
Logic Supply Voltage. +5V supply for the internal logic circuitry. Bypass to GND with 100pF and
0.1µF capacitors as close as possible to the pin.
Ground
ATTEN_OUTB Attenuator B Output. Internally matched to 50Ω.
Attenuator B Supply. +5V supply for attenuator B. Bypass to GND with 100pF and 0.01µF capacitors
as close as possible to the pin.
15
VCC
18
ATTEN_INB
20
RSET2
Output Amplifier Bias-Current-Setting Resistor. Sets the bias current for the output amplifier stage.
Connect a 3.92kΩ resistor to ground.
21
VCCBIAS2
Bias Circuit Supply Voltage. +5V supply for the internal bias circuitry. Bypass to GND with 1000pF
and 0.1µF capacitors as close as possible to the pin.
23
AMPOUT
RF Amplifier Output. Internally matched to 50Ω.
27
VCCAMP
RF Amplifier Supply Voltage. +5V supply for the RF amplifier. Bypass to GND with 1000pF and 0.1µF
capacitors as close as possible to the pin.
28
AMPIN
29
VCCBIAS1
31
RSET1
33
Attenuator B Input. Internally matched to 50Ω.
RF Amplifier Input. Internally matched to 50Ω.
Bias Circuit Supply Voltage. +5V supply for the internal bias circuitry. Bypass to GND with 1000pF
and 0.1µF capacitors as close as possible to the pin.
Input Amplifier Bias-Current-Setting Resistor. Sets the bias current for the input amplifier stage.
Connect a 1.2kΩ resistor to ground.
ATTEN_OUTA Attenuator A Output. Internally matched to 50Ω.
36
VCC
39
ATTEN_INA
40
LBBIAS
EP
GND
Attenuator A Supply Voltage. +5V supply for attenuator A. Bypass to GND with 100pF and 0.01µF
capacitors as close as possible to the pin.
Attenuator A Input. Internally matched to 50Ω.
Loopback Mixer Bias-Current-Setting Resistor. Sets the bias current for the mixer. Connect a 2kΩ
resistor to ground.
Exposed Ground Paddle. Solder the exposed paddle to GND using multiple vias.
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11
MAX2058
Pin Description
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
Detailed Description
The MAX2058 high-linearity DVGA consists of two 5-bit,
31dB digital attenuators, a fixed-gain two-stage driver
amplifier, a loopback mixer, and a serial interface to
control the attenuators. This high level of component
integration makes the MAX2058 ideal for base-station
transmitter applications. The MAX2058 is designed to
operate in the 700MHz to 1200MHz frequency ranges.
The overall cascaded performance of the MAX2058
produces a typical 10.5dB gain, a +32.3dBm OIP3, a
19dBm OP1dB, and a total 62dB gain-control range.
5-Bit Attenuators
The MAX2058 integrates two 5-bit digital attenuators to
achieve a high dynamic range. Each attenuator has a
31dB control range, a 1dB step size, and is programmed with the 3-wire SPI. See the Applications
Information section and Table 1 for attenuator programming details. The attenuators can be used for both static and dynamic power control.
Table 1. Attenuator Programming
ATTENUATOR A (5 MSBs)
ATTENUATOR B (5 LSBs)
Bit 9 = 16dB step
Bit 4 = 16dB step
Bit 8 = 8dB step
Bit 3 = 8dB step
Bit 7 = 4dB step
Bit 2 = 4dB step
Bit 6 = 2dB step
Bit 1 = 2dB step
Bit 5 = 1dB step
Bit 0 = 1dB step
DATA MSB
BIT 9
BIT 8
BIT 1
BIT 0
LSB
Driver Amplifier
The MAX2058 includes a two-stage medium power
amplifier with a fixed 17.5dB gain. The driver amplifier
circuit is optimized for high linearity and medium output
power capability for the 800MHz to 1000MHz frequency range. The driver amplifier is intended to amplify a
modulated signal and drive a high-power amplifier in
base-station transmitters. In a typical application, the
driver amplifier is cascaded in between the two digital
attenuators. See the Typical Application Circuit.
The two-stage amplifier stage can be disabled for
applications where only the digital attenuators and/or
loopback mixer are used. To disable the two-stage
amplifier, ground or leave unconnected the amplifier
supplies VCCBIAS2, VCCAMP, VCCBIAS1, and also
the inputs for setting the amplifier bias currents RSET1,
RSET2. This reduces the supply current by approximately 132mA under typical conditions.
Loopback Mixer
The MAX2058 loopback mixer uses a double-balanced
active architecture designed to operate with a 700MHz
to 1200MHz RF frequency range, and a 40MHz to
100MHz LO frequency range. The RF port of the mixer is
connected internally (with an on-chip switch) to the input
of the first attenuator stage. The mixer’s IF port is
matched for a single-ended 50Ω impedance, while the
LO port requires a differential input impedance of 100Ω.
The loopback mixer facilitates a self-diagnostic mode
for cellular transceivers, whereby the Tx band signal at
the input of the mixer can be translated up or down to
the corresponding Rx band. This translated signal can
then be fed back to the radio’s receiver for complete
Tx/Rx loop diagnostics. The loopback mixer is enabled
and disabled with LB_EN. Set LB_EN to a logic-low 0 to
enable the mixer, set LB_EN to a logic-high 1 to disable
the mixer.
Applications Information
CLOCK
tCH
tCS
tCW
SPI Interface and Attenuator Settings
CS
tEWN
tES
tEW
NOTES:
DATA ENTERED ON CLOCK RISING EDGE.
ATTENUATOR STATE CHANGE ON CS RISING EDGE.
Figure 1. SPI Timing Diagram
12
The two 5-bit attenuators are programmed with the 3wire SPI/MICROWIRE-compatible serial interface using
10-bit words. Bit 9 of the 10-bit data is shifted in first,
along with all remaining data bits, on the rising edge of
the clock regardless of CS being high or low. Once all
the data bits are shifted in, all will be sent to the attenuators on the rising edge of CS, thus changing the attenuation state. For standard SPI operation, pull CS low for the
duration of a valid 10-bit data set (tEWN). This CS negative pulse width includes the setup time of the rising
clock edge to CS transitioning high (tES). See Figure 1.
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700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
from the EP. In addition, provide the EP with a lowinductance path to electrical ground. The EP MUST be
soldered to a ground plane on the PC board, either
directly or through an array of plated via holes.
Table 2. Component List Referring to the
Typical Application Circuit
External Bias
Bias currents for the two-stage amplifier and the loopback mixer are set and optimized with external resistors.
Resistor R1 (pin 31) sets the bias current for the input
amplifier, R2 (pin 20) sets the bias current for the output
amplifier, and R3 (pin 40) sets the bias for the loopback
mixer. The external biasing resistor values can be
increased for reduced current operation at the expense
of performance. Contact the factory for details.
COMPONENT
VALUE
DESCRIPTION
C1, C4, C10, C13,
C16
0.1µF
Microwave capacitors (0603)
C2, C5, C8, C17
100pF
Microwave capacitors (0402)
C3, C6, C14, C19
47pF
Microwave capacitors (0402)
C7, C18
0.01µF
Microwave capacitors (0402)
C9, C12, C15
1000pF
Microwave capacitors (0402)
C11
3.9pF
Microwave capacitor (0402)
Board Layout
R1
1.2kΩ
±1% resistor (0402)
The pin configuration of the MAX2058 has been optimized to facilitate a very compact physical layout of the
device and its associated discrete components.
The exposed paddle (EP) of the MAX2058’s thin QFNEP package provides a low thermal-resistance path to
the die. It is important that the PC board on which the
MAX2058 is mounted be designed to conduct heat
R2
3.92kΩ
±1% resistor (0402)
R3
2.0kΩ
±1% resistor (0402)
R4
110Ω
MAX5873
DUAL DAC
MAX4395
QUAD AMP
±1% resistor (0402)
T1
2:1
RF transformer (100:50)
Mini-Circuits TC2-1T
U1
—
MAX2058 MAXIM IC
MAX2021/MAX2022/MAX2023*
ZERO-IF
MODS/DEMODS
MAX2058/MAX2059*
RF DIGITAL VGAs
I
12
90°
0°
31dB
∑
17.5dB
31dB
RF OUT
Q
12
SPI
LOGIC
MAX9491*
VCO + PLL
*FUTURE PRODUCTS—CONTACT FACTORY FOR SAMPLES
45, 80,
OR
95MHz
LO
LOOPBACK Rx
SPI
OUT
OFF CONTROL
(FEEDS BACK
INTO Rx CHAIN
FRONT-END)
Figure 2. Direct Conversion Transmitter for GSM/EDGE Basestations
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13
MAX2058
The 5 MSBs of the 10-bit word program attenuator A,
and the 5 LSBs of the 10-bit word program attenuator
B. Each bit sets the attenuators to a corresponding
attenuation level. For example, logic-low 0 for bit 5 and
bit 0 of attenuator A and B, respectively, sets both
attenuators at 1dB. 00000 configures both attenuators
for 31dB attenuation and 11111 sets for 0dB attenuation. See Table 1 for programming details.
Direct-Conversion Base-Station
Transmitter
together with the MAX2021/MAX2022/MAX2023* directconversion modulators/demodulators, the MAX5873
dual-channel DAC, and the MAX4395 quad amplifier,
form an ideal total transmitter lineup. This overall system is highly efficient and low cost, while maintaining
high linearity and low noise performance.
The MAX2058/MAX2059 are designed to interface
directly with Maxim’s direct-conversion quadrature
modulators and high-speed DACs to provide a complete solution for GSM/EDGE base-station transmitter
applications. See Figure 2. The MAX2058/MAX2059,
Typical Application Circuit
VCC
T1
40
LO+
R4
LOVCCLB
VCC
C1
C2
C3
39
38
1
36
37
35
34
33
RSET1
R1
GND
GND
GND
VCC
GND
GND
LBBIAS
ATTN_INA
C19
R3
LO INPUT
C18
ATTEN_OUTA
C17
RF INPUT
32
31
VCC
30
5-BIT ATTENUATOR
A
GND
C15
2
29
3
28
VCCBIAS1
C16
C14
AMPIN
MAX2058
LBOUT
LB_EN
4
27
5
DATA
CLK
25
6
SPI
7
VCCAMP
26 GND
DRIVER AMP
LBOUT
24
C12
VCC
C13
GND
GND
C11
CS
VCCLOGIC
VCC
C4
C5
GND
23
8
9
E.P.
5-BIT ATTENUATOR
B
22
10
21
AMPOUT
GND
VCCBIAS2
C9
C6
C8
20
RSET2
19
GND
18
ATTEN_INB
17
GND
16
GND
15
VCC
14
GND
13
GND
12
ATTEN_OUTB
11
GND
MAX2058
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
R2
C7
RF OUTPUT
14
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VCC
C10
700MHz to 1200MHz High-Linearity,
SPI-Controlled DVGA with Integrated Loopback Mixer
GND
ATTEN_OUTA
GND
RSET1
37
GND
GND
38
VCC
ATTEN_INA
39
GND
LBBIAS
40
36
35
34
33
32
31
5-BIT ATTENUATOR
A
LO+ 1
30 GND
LO- 2
29 VCCBIAS1
VCCLB 3
28 AMPIN
MAX2058
LBOUT 4
27 VCCAMP
LB_EN 5
26 GND
DRIVER AMP
25 GND
DATA 6
CLK 7
24 GND
SPI
23 AMPOUT
CS 8
5-BIT ATTENUATOR
B
VCCLOGIC 9
22 GND
GND 10
11
12
13
14
15
16
17
18
19
20
GND
ATTEN_OUTB
GND
GND
VCC
GND
GND
ATTEN_INB
GND
RSET2
21 VCCBIAS2
Chip Information
PROCESS: SiGe BiCMOS
Package Information
For the latest package outline information, go to
www.maxim-ic.com/packages.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
© 2006 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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MAX2058
Pin Configuration/Functional Diagram