Download LTC1069-6 - Single Supply, Very Low Power, Elliptic Lowpass Filter

LTC1069-6
Single Supply, Very Low
Power, Elliptic Lowpass Filter
FEATURES
DESCRIPTION
n
The LTC®1069-6 is a monolithic low power, 8th order lowpass
filter optimized for single 3V or single 5V supply operation.
The LTC1069-6 typically consumes 1mA under single 3V
supply operation and 1.2mA under 5V operation.
n
n
n
n
n
n
n
n
n
n
8th Order Elliptic Filter in SO-8 Package
Single 3V Operation: Supply Current: 1mA (Typ)
fCUTOFF: 14kHz (Max) S/N Ratio: 72dB
Single 5V Operation: Supply Current: 1.2mA (Typ)
fCUTOFF: 20kHz (Max) S/N Ratio: 79dB
± 0.1dB Passband Ripple Up to 0.9fCUTOFF (Typ)
42dB Attenuation at 1.3fCUTOFF
66dB Attenuation at 2.0fCUTOFF
70dB Attenuation at 2.1fCUTOFF
Wide Dynamic Range, 75dB or More (S/N + THD),
Under Single 5V Operation
Wideband Noise: 120µVRMS
Clock-to-fCUTOFF Ratio: 50:1
Internal Sample Rate: 100:1
APPLICATIONS
n
n
n
n
n
n
The cutoff frequency of the LTC1069-6 is clock tunable and it is
equal to the clock frequency divided by 50. The input signal is
sampled twice per clock cycle to lower the risk of aliasing.
The typical passband ripple is ± 0.1dB up to 0.9fCUTOFF .
The gain at fCUTOFF is –0.7dB. The transition band of the
LTC1069-6 features progressive attenuation reaching
42dB at 1.3fCUTOFF and 70dB at 2.1fCUTOFF. The maximum
stopband attenuation is 72dB.
The LTC1069-6 can be clock tuned for cutoff frequencies
up to 20kHz (single 5V supply) and for cutoff frequencies
up to 14kHz (single 3V supply).
The low power feature of the LTC1069-6 does not penalize
the device’s dynamic range. With single 5V supply and
an input range of 0.4VRMS to 1.4VRMS , the Signal-to(Noise + THD) ratio is ≥70dB. The wideband noise of the
LTC1069-6 is 125μVRMS .
Handheld Instruments
Telecommunication Filters
Antialiasing Filters
Smoothing Filters
Audio
Multimedia
Other filter responses with higher speed can be obtained.
Please contact LTC Marketing for details.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
The LTC1069-6 is available in an 8-pin SO package.
TYPICAL APPLICATION
Frequency Response
10
VIN = 500mVRMS
0
Single 3V Supply 10kHz Elliptic Lowpass Filter
–20
VOUT
GAIN (dB)
AGND
3V
V+
0.47μF
0.1μF
V–
LTC1069-6
NC
NC
VIN
CLK
–10
–30
–40
–50
–60
fCLK = 500kHz
–70
1069-6 TA01
–80
5
10
20
15
FREQUENCY (kHz)
www.BDTIC.com/Linear
25
1069-6 TA02
10696fa
1
LTC1069-6
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
Total Supply Voltage (V + to V –) ................................12V
Operating Temperature Range
LTC1069-6C ............................................. 0°C to 70°C
LTC1069-6I ..........................................– 40°C to 85°C
Storage Temperature..............................– 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
TOP VIEW
AGND 1
8
VOUT
V+
2
7
V–
NC 3
6
NC
VIN 4
5
CLK
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 130°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC1069-6CS8#PBF
LTC1069-6CS8#TRPBF
10696
8-Lead Plastic SO
0°C to 70°C
LTC1069-6IS8#PBF
LTC1069-6IS8#TRPBF
10696I
8-Lead Plastic SO
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range. fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/50. The fCLK signal level is TTL or CMOS (clock rise or
fall time ≤ 1µs) RL = 10k, VS = 5V, TA = 25°C, unless otherwise specified. All AC gains are measured relative to the passband gain.
SYMBOL
CONDITIONS
Passband Gain (fIN ≤ 0.2fCUTOFF)
VS = 5V, fCLK = 200kHz
fTEST = 0.25kHz, VIN = 1VRMS
Gain at 0.50fCUTOFF
Gain at 0.75fCUTOFF
Gain at 0.90fCUTOFF
Gain at 0.95fCUTOFF
2
MIN
TYP
MAX
UNITS
l
– 0.25
– 0.30
0.1
0.1
0.45
0.50
db
db
VS = 3V, fCLK = 200kHz
fTEST = 0.25kHz, VIN = 0.5VRMS
l
– 0.25
– 0.30
0.1
0.1
0.45
0.50
db
db
VS = 5V, fCLK = 200kHz
fTEST = 2.0kHz, VIN = 1VRMS
l
– 0.10
– 0.15
0.07
0.07
0.25
0.30
db
db
VS = 3V, fCLK = 200kHz
fTEST = 2.0kHz, VIN = 0.5VRMS
l
– 0.15
– 0.20
0.07
0.07
0.25
0.30
db
db
VS = 5V, fCLK = 200kHz
fTEST = 3.0kHz, VIN = 1VRMS
l
– 0.25
– 0.30
0
0
0.25
0.30
db
db
VS = 3V, fCLK = 200kHz
fTEST = 3.0kHz, VIN = 0.5VRMS
l
– 0.25
– 0.30
0
0
0.25
0.30
db
db
VS = 5V, fCLK = 200kHz
fTEST = 3.6kHz, VIN = 1VRMS
l
– 0.25
– 0.25
0.1
0.1
0.45
0.45
db
db
VS = 3V, fCLK = 200kHz
fTEST = 3.6kHz, VIN = 0.5VRMS
l
– 0.25
– 0.30
0.1
0.1
0.45
0.50
db
db
VS = 5V, fCLK = 200kHz
fTEST = 3.8kHz, VIN = 1VRMS
l
– 0.35
– 0.45
0.05
0.05
0.25
0.25
db
db
VS = 3V, fCLK = 200kHz
fTEST = 3.8kHz, VIN = 0.5VRMS
l
– 0.45
– 0.55
0.05
0.05
0.25
0.35
db
db
www.BDTIC.com/Linear
10696fa
LTC1069-6
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range. fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/50. The fCLK signal level is TTL or CMOS (clock rise or
fall time ≤ 1µs) RL = 10k, VS = 5V, TA = 25°C, unless otherwise specified. All AC gains are measured relative to the passband gain.
SYMBOL
CONDITIONS
Gain at fCUTOFF
VS = 5V, fCLK = 200kHz
fTEST = 4.0kHz, VIN = 1VRMS
Gain at 1.30fCUTOFF
Gain at 2.00fCUTOFF
MIN
TYP
MAX
UNITS
l
– 1.50
– 1.65
–0.07
–0.07
–0.20
–0.25
db
db
VS = 3V, fCLK = 200kHz
fTEST = 4.0kHz, VIN = 0.5VRMS
l
– 1.5
– 1.7
–0.07
–0.07
0
0
db
db
VS = 5V, fCLK = 200kHz
fTEST = 5.2kHz, VIN = 1VRMS
l
–42
–42
–40
–39
db
db
VS = 3V, fCLK = 200kHz
fTEST = 5.2kHz, VIN = 0.5VRMS
l
–41
–41
–38
–37
db
db
VS = 5V, fCLK = 200kHz
fTEST = 8.0kHz, VIN = 1VRMS
l
–66
–66
–61
–60
db
db
VS = 3V, fCLK = 200kHz
fTEST = 8.0kHz, VIN = 0.5VRMS
l
–66
–66
–60
–59
db
dB
0.15
0
0.5
0.5
db
db
175
135
mV
mV
Gain at 0.95fCUTOFF
VS = 5V, fCLK = 400kHz, fTEST = 7.6kHz, VIN = 1VRMS
VS = 3V, fCLK = 400kHz, fTEST = 7.6kHz, VIN = 0.5VRMS
Output DC Offset (Note 1)
VS = 5V, fCLK = 100kHz
VS = 3V, fCLK = 100kHz
50
30
Output DC Offset Tempco
VS = 5V, VS = 3V
30
μV/°C
Output Voltage Swing (Note 2)
VS = 5V, fCLK = 100kHz
VS = 3V, fCLK = 100kHz
Power Supply Current
VS = 5V, fCLK = 100kHz
VS = 3V, fCLK = 100kHz
Maximum Clock Frequency
– 0.5
– 0.5
l
3.4
3.2
4.2
4.2
VP-P
VP-P
l
1.6
1.6
2.0
2.0
VP-P
VP-P
l
l
VS = 5V
VS = 3V
1.60
1.65
mA
mA
1
1.40
1.55
mA
mA
1
0.7
Input Frequency Range
0
Input Resistance
35
Operating Supply Voltage (Note 3)
3
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The input offset voltage is measured with respect to AGND (Pin 1).
The input (Pin 4) is also shorted to the AGND pin. The analog ground pin
potential is internally set to (0.437)(VSUPPLY).
1.2
MHz
MHz
<(fCLK – 2fC)
50
80
kΩ
10
V
Note 3: The input voltage can swing to either rail (V + or ground); the
output typically swings 50mV from ground and 0.8V from V+.
Note 4: The LTC1069-6 is optimized for 3V and 5V operation. Although
the device can operate with a single 10V supply or ±5V, the total harmonic
distortion will be degraded. For single 10V or ±5V supply operation we
recommend to use the LTC1069-1.
www.BDTIC.com/Linear
10696fa
3
LTC1069-6
TYPICAL PERFORMANCE CHARACTERISTICS
Transition Band Gain
vs Frequency
Passband Gain vs Frequency
2
VS = SINGLE 3V
fCLK = 500kHz
fCUTOFF = 10kHz
VIN = 0.5VRMS
1
VS = SINGLE 3V
fCLK = 500kHz
fCUTOFF = 10kHz
VIN = 0.5VRMS
0
–10
0
–1
3
1
7
5
FREQUENCY (kHz)
9
–40
–50
–76
–80
–78
–80
16
14
FREQUENCY (kHz)
18
20
20
1
3
5
10
–10
GAIN (db)
–20
0
fCLK
500kHz
fCUTOFF
10kHz
fCLK
750kHz
fCUTOFF
15kHz
–50
fCLK
1MHz
–70
fCUTOFF
20kHz
–80
Phase vs Frequency
3
5
VS = SINGLE 5V
fCLK = 500kHz
fCUTOFF = 10kHz
–450
–540
–630
100
1069-6 G06
Transient Response
3.00E-04
0.5V/DIV
GROUP DELAY (SEC)
–360
10
FREQUENCY (kHz)
VS = SINGLE 5V
fCLK = 500kHz
fCUTOFF = 10kHz
3.50E-04
–270
SINGLE 3V
1
7 9 11 13 15 17 19 21
FREQUENCY (kHz)
Group Delay vs Frequency
4.00E-04
–180
SINGLE 5V
1069-6 G05
90
–90
–40
–90
1
1069-6 G04
0
–30
–60
–1
–2
100
fCLK = 500kHz
VIN = 0.5VRMS
0
1
7 9 11 13 15 17 19 21
FREQUENCY (kHz)
80
60
FREQUENCY (kHz)
Amplitude Response
vs Supply Voltage
VS = SINGLE 5V
VIN = 1VRMS
fCLK = 500kHz
fCUTOFF = 10kHz
–1
40
1069-6 G03
2
GAIN (dB)
GAIN (dB)
12
10
Passband Gain vs Clock Frequency
0
–72
–74
Passband Gain vs Clock Frequency
fCLK = 750kHz
fCUTOFF = 15kHz
–70
–70
1069-6 G02
1
–68
–60
VS = SINGLE 3V
VIN = 0.5VRMS
PHASE (DEG)
–66
1069-6 G01
2
–2
–64
–30
–90
11
VS = SINGLE 3V
fCLK = 500kHz
fCUTOFF = 10kHz
VIN = 0.5VRMS
–62
GAIN (dB)
GAIN (dB)
GAIN (dB)
–20
–2
Stopband Gain vs Frequency
–60
10
2.50E-04
2.00E-04
1.50E-04
1.00E-04
–720
5.00E-05
–810
–900
0
2
4
8
10
6
FREQUENCY (kHz)
12
14
1069-6 G07
4
0.00E+00
0
2
4
8
6
FREQUENCY (kHz)
10
12
VS = SINGLE 5V 0.1ms/DIV
fCLK = 1MHz
fIN = 1kHz
2Vp-p SQUARE WAVE
1069-6 G09
1069-6 G08
www.BDTIC.com/Linear
10696fa
LTC1069-6
TYPICAL PERFORMANCE CHARACTERISTICS
Dynamic Range THD + Noise
vs Input/Output Voltage
Dynamic Range THD + Noise
vs Input Voltage
VIN = 2.945VP-P
–55
THD + NOISE (dB)
THD + NOISE (dB)
fCLK = 170kHz
–45 fCUTOFF = 3.4kHz
f = 1kHz
–50 IN
–60
–65
–70
–75
THD + Noise vs Frequency
–40
–40
fCLK = 500kHz
–45 fIN = 1kHz
fCLK = 500kHz
–45 fCUTOFF = 10kHz
–50
–50
–55
THD + NOISE (dB)
–40
VS = SINGLE 3V
–60
VS =
SINGLE 5V
–65
–70
–75
–55
–65
–70
–75
–80
–80
–80
–85
–85
–85
–90
0.1
–90
0.1
1
INPUT/OUTPUT VOLTAGE (VP-P)
3
VS = SINGLE 5V
VIN = 1VRMS
–90
0.5 0.76 1 1.43
INPUT VOLTAGE (VRMS)
1069-6 G14
5
1
10
5
FREQUENCY (kHz)
1069-6 G10
1069-6 G11
Output Voltage Swing
vs Temperature
Supply Current vs Supply Voltage
POSITIVE SWING (V)
5
4
3
4.5
RL = 10k
VS = SINGLE 5V
4.0
2.5
VS = SINGLE 3V
2.0
85°C
25°C
2
–40°C
1
0
0
2
8
6
4
10 12 14
TOTAL SUPPLY VOLTAGE (V)
16
NEGATIVE SWING (mV)
SUPPLY CURRENT (mA)
VS = SINGLE 3V
VIN = 0.5VRMS
–60
80
60
VS = SINGLE 3V
40
20
VS = SINGLE 5V
0
–40
–20
0
20
40
60
AMBIENT TEMPERATURE (°C)
1069-6 G12
80
1069-6 G13
PIN FUNCTIONS
AGND (Pin 1): Analog Ground. The quality of the analog
signal ground can affect the filter performance. For either
single or dual supply operation, an analog ground plane
surrounding the package is recommended. The analog
ground plane should be connected to any digital ground
at a single point. For single supply operation, Pin 1 should
be bypassed to the analog ground plane with a 0.47μF
capacitor or larger. An internal resistive divider biases
Pin 1 to 0.4366 times the total power supply of the device
(Figure 1). That is, with a single 5V supply, the potential
at Pin 1 is 2.183V ±1%. As the LTC1069-6 is optimized
1
AGND
2 V+
VOUT
8
V– 7
11.325k 8.775k
3
4
NC
NC
LTC1069-6
VIN
CLK
6
5
1069-6 F01
Figure 1. Internal Biasing of the Analog Ground (Pin 1)
www.BDTIC.com/Linear
10696fa
5
LTC1069-6
PIN FUNCTIONS
for single supply operation, the internal biasing of Pin 1
allows optimum output swing. The AGND pin should be
buffered if used to bias other ICs. Figure 2 shows the
connections for single supply operation.
1
0.47μF
V+
2
AGND
V+
0.1μF
3
4
VIN
VOUT
V–
LTC1069-6
NC
NC
VIN
CLK
8
VOUT
7
6
5
ANALOG GROUND PLANE
STAR
SYSTEM
GROUND
DIGITAL
GROUND
PLANE
1k
CLOCK
SOURCE
1069-6 F02
Figure 2. Connections for Single Supply Operation
V +, V – (Pins 2, 7): Power Supply Pins. The V + (Pin 2)
and the V – (Pin 7, if used) should be bypassed with a
0.1μF capacitor to an adequate analog ground. The filter’s
power supplies should be isolated from other digital or
high voltage analog supplies. A low noise linear supply is
recommended. Switching power supplies will lower the
signal-to-noise ratio of the filter. Unlike previous monolithic
filters, the power supplies can be applied in any order, that
is, the positive supply can be applied before the negative
supply and vice versa. Figure 3 shows the connection for
dual supply operation.
1
2
V+
0.1μF
3
4
VIN
AGND
VOUT
V+
V–
LTC1069-6
NC
NC
VIN
CLK
8
7
VOUT
V–
0.1μF
6
5
ANALOG GROUND PLANE
STAR
SYSTEM
GROUND
DIGITAL
GROUND
PLANE
NC (Pins 3, 6): No Connection. Pins 3 and 6 are not
connected to any internal circuitry; they should be tied
to ground.
VIN (Pin 4): Filter Input Pin. The Filter Input pin is internally
connected to the inverting input of an op amp through a
50k resistor.
CLK (Pin 5): Clock Input Pin. Any TTL or CMOS clock
source with a square wave output and 50% duty cycle
(±10%) is an adequate clock source for the device. The
power supply for the clock source should not necessarily
be the filter’s power supply. The analog ground of the filter
should be connected to the clock’s ground at a single
point only. Table 1 shows the clock’s low and high level
threshold value for a dual or single supply operation. A
pulse generator can be used as a clock source provided
the high level ON time is greater than 0.42μs (VS = ±5V).
Sine waves less than 100kHz are not recommended for
clock frequencies because, excessive slow clock rise or
fall times generate internal clock jitter. The maximum clock
rise or fall time is 1μs. The clock signal should be routed
from the right side of the IC package to avoid coupling
into any input or output analog signal path. A 1k resistor
between the clock source and the Clock Input (Pin 5) will
slow down the rise and fall times of the clock to further
reduce charge coupling (Figure 1).
Table 1. Clock Source High and Low Thresholds
POWER SUPPLY
HIGH LEVEL
LOW LEVEL
Dual Supply = ±5V
1.5V
0.5V
Single Supply = 10V
6.5V
5.5V
Single Supply = 5V
1.5V
0.5V
Single Supply = 3.3V
1.2V
0.5V
VOUT (Pin 8): Filter Output Pin. Pin 8 is the output of the
filter, and it can source 8mA or sink 1mA. The total harmonic
distortion of the filter will degrade when driving coaxial
cables or loads less than 20k without an output buffer.
1k
CLOCK
SOURCE
1069-6 F03
Figure 3. Connections for Dual Supply Operation
6
www.BDTIC.com/Linear
10696fa
LTC1069-6
APPLICATIONS INFORMATION
Temperature Behavior
2
VS = SINGLE 3V
VIN = 0.5VRMS
1
GAIN (dB)
The power supply current of the LTC1069-6 has a positive
temperature coefficient. The GBW product of its internal
op amps is nearly constant and the speed of the device
does not degrade at high temperatures. Figures 4a, 4b
and 4c show the behavior of the passband of the device
for various supplies and temperatures. The filter has a
passband behavior which is temperature independent.
85°C
0
–2
The clock feedthrough is defined as the RMS value of the
clock frequency and its harmonics that are present at the
filter’s Output (Pin 8). The clock feedthrough is tested with
the Input (Pin 4) shorted to AGND (Pin 1) and depends on
PC board layout and on the value of the power supplies.
With proper layout techniques the values of the clock
feedthrough are shown in Table 2.
CLOCK FEEDTHROUGH
3.3V
100μVRMS
5V
170μVRMS
10V
350μVRMS
1
3
5
7 9 11 13 15 17 19 21
FREQUENCY (kHz)
1069-6 F04a
Figure 4a
2
VS = SINGLE 5V
VIN = 1VRMS
1
GAIN (dB)
VS
fCLK = 500kHz
fCUTOFF = 10kHz
–1
Clock Feedthrough
Table 2. Clock Feedthrough
–40°C
85°C
0
–40°C
fCLK = 750kHz
fCUTOFF = 15kHz
–1
–2
Any parasitic switching transients during the rising and
falling edges of the incoming clock are not part of the
clock feedthrough specifications. Switching transients
have frequency contents much higher than the applied
clock; their amplitude strongly depends on scope probing
techniques as well as grounding and power supply
bypassing. The clock feedthrough can be reduced by adding
a single RC lowpass filter at the Output (Pin 8).
1
3
5
7 9 11 13 15 17 19 21
FREQUENCY (kHz)
1069-6 F04a
Figure 4b
2
VS = ±5V
VIN = 1.5VRMS
GAIN (dB)
1
85°C
0
–40°C
fCLK = 1MHz
fCUTOFF = 20kHz
–1
–2
1
4
7
10 13 16 19 22 25 28 31
FREQUENCY (kHz)
1069-6 F04c
Figure 4c
www.BDTIC.com/Linear
10696fa
7
LTC1069-6
APPLICATIONS INFORMATION
Wideband Noise
Aliasing
The wideband noise of the filter is the total RMS value
of the device’s noise spectral density and determines the
operating signal-to-noise ratio. The frequency contents
of the wideband noise lie within the filter’s passband. The
wideband noise cannot be reduced by adding post filtering.
The total wideband noise is nearly independent of the
clock frequency and depends slightly on the power supply
voltage (see Table 3). The clock feedthrough specifications
are not part of the wideband noise.
Aliasing is an inherent phenomenon of sampled data
systems and occurs for input frequencies approaching
the sampling frequency. The internal sampling frequency
of the LTC1069-6 is 100 times its cutoff frequency. For
instance, if a 98.5kHz, 100mVRMS signal is applied at
the input of an LTC1069-6 operating with a 50kHz clock,
a 1.5kHz, 484μVRMS alias signal will appear at the filter
output. Table 4 shows details.
Table 3. Wideband Noise
INPUT FREQUENCY
(VIN = 1VRMS)
(kHz)
OUTPUT LEVEL
(Relative to Input)
(dB)
OUTPUT FREQUENCY
(Aliased Frequency)
(kHz)
VS
WIDEBAND NOISE
3.3V
118μVRMS
5V
123μVRMS
96 (or 104)
–78.3
4.0
127μVRMS
97 (or 103)
–70.4
3.0
98 (or 102)
– 80.6
2.0
98.5 (or 101.5)
–46.3
1.5
99 (or 101)
–2.8
1.0
99.5 (or 100.5)
–1.38
0.5
±5V
8
Table 4. Aliasing (fCLK = 50kHz)
fCLK/fC = 50:1, fCUTOFF = 1kHz
www.BDTIC.com/Linear
10696fa
LTC1069-6
PACKAGE DESCRIPTION
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
NOTE 3
.045 ±.005
.050 BSC
8
.245
MIN
7
6
5
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 ±.005
TYP
1
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
s 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
2
3
4
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
www.BDTIC.com/Linear
SO8 0303
10696fa
9
LTC1069-6
TYPICAL APPLICATION
Single 5V Operation with Power Shutdown
5V
ON SHUTDOWN
1
AGND
2
0.47μF
8
VOUT
VOUT
7
V–
V+
LTC1069-6
3
6
NC
NC
0.1μF
VIN
4
VIN
fCLK ≤
750kHz
5
CLK
5V
0V
1069-6 TA03
Single 3V Supply Operation with Output Buffer
3.3V
0.1μF
8
5
7
V–
V+
LTC1069-6
3
6
NC
NC
6
1
0.47μF
AGND
VOUT
2
0.1μF
4
VIN
VIN
CLK
5
+
8
7
1/2 LT1366
fCLK
500kHz
–
3.3V
0V
VOUT
4
1069-6 TA04
Single 3V Supply Voice Band Lowpass Filter with Rail-to-Rail Input and Output
3V
1
1μF 3V
0.1μF
–
1/2 LT1366
10k
3
270pF
+
VOUT
5
8
2
7
V–
V+
LTC1069-6
3
6
NC
NC
4
2
AGND
VIN
CLK
5
0.1μF
8
+
7
1/2 LT1366
6
–
10k
170kHz
40.2k
1069-6 TA05
1
4
40.2k
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC1068
Very Low Noise, High Accuracy, Quad Universal Filter Building Block
User-Configurable, SSOP Package
LTC1069-1
Low Power, Progressive Elliptic LPF
fCLK/fC Ratio 100:1, 8-Pin SO Package
LTC1164-5
Low Power 8th Order Butterworth LPF
fCLK/fC Ratio 100:1 and 50:1
LTC1164-6
Low Power 8th Order Elliptic LPF
fCLK/fC Ratio 100:1 and 50:1
LTC1164-7
Low Power 8th Order Linear Phase LPF
fCLK/fC Ratio 100:1 and 50:1
Corporation
www.BDTIC.com/Linear
10 Linear Technology
10696fa
LT 0309 REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2008