Download High-Speed Data Communication LA302Z – 10 GHz Differential

Euvis
Differential Limiting Amplifier, LA302Z
High-Speed Data Communication
LA302Z – 10 GHz Differential Limiting Amplifier
16-pin Plastic QFN Package
PRODUCT DESCRIPTION
The LA302Z is an ultra-broadband fully differential limiting amplifier designed for highspeed wide-band communication applications up to 10 Gb/s. The amplifier has an
excellent input sensitivity of 2.5 mVpp and a small-signal bandwidth of 10 GHz. Its wide
bandwidth and high sensitivity ensure a low bit error rate in high-speed data
communication. Its lost-of-signal detector can warn the receiver as the incoming signal is
too small for a certain bit error rate. The device can be used as an input sensing amplifier,
a repeater, and a wide-band single-ended-to-differential converter.
KEY FEATURES
•
•
•
•
•
•
•
•
•
37-dB gain
10 GHz bandwidth
< 2.5 mVpp single-ended/differential input sensitivity
Differential 50-Ω inputs and outputs
750m-Vpp maximum differential output swing
Lost-of-Signal (LOS) detector
Output waveform envelope detector
Output waveform crossing control
Power consumption: 0.3 W with +5 V single power supply
BLOCK DIAGRAM
VREF
LOS
ENVP
Envelope
Detector
IP
OP
Driver
IN
CC
Rev. 8B4_C, 11/14/08
ON
Crossing
Control
1
Euvis
Differential Limiting Amplifier, LA302Z
ELECTRICAL SPECIFICATIONS
Testing Condition: VCC = 5 V
Parameter
Symbol
Min
Typical
Max
Operating Temperature
To
−40
25
85
Small-Signal Max Gain1
Go,max
38
43
dB
Small-Signal 3-dB Bandwidth
f3dB,max
8.3
10
GHz
600
750
mVpp
Output Swing1 (RL=50Ω)
Unit
o
C
Worst Input Return Loss2
RLI
5
8
dB
Worst Output Return Loss2
RLO
3
7
dB
Tr
31
36
ps
Tf
22
26
ps
Output Rise Time
3
Output Fall Time3
Output Overshoot
0
4
Output Jitter, RMS
1.2
5
Sensitivity
Output DC Offset
6
%
1.6
ps
Vsen
2.5
mVpp
Voff
5
10
mV
Positive VCC supply Voltage
VCC
4.5
5
5.5
V
Positive VCC supply Current
Itotal
50
60
70
mA
1
2
Rev. 8B4_C, 11/14/08
differential I/O
DC to f3dB measured on an evaluation board with SMA connectors
3
20%~80%
4
for Input 500 mVpp,single ended
5
where bit error rate < 10–12 with 231-1 pseudo-random data
6
measured with zero inputs
2
Euvis
Differential Limiting Amplifier, LA302Z
TERMINAL DESCRIPTION
I/O
Name
Function
VEE
Ground
DC
VCC
Power, +5 V
DC
IP
Data Input+
IN
Data Input−
CC
Output Crossing Control
OP
Output +
ON
Output −
LOS
Lost-Of-Signal Detector
VCS
VCS Generator Bypass
ENVP
VREF
Rev. 8B4_C, 11/14/08
Signal
I
I
RF
I
O
DC
O
O
RF
RF
RF
DC
DC
Output Swing Envelope
O
O
Reference Voltage for LOS
I
DC
DC
3
Euvis
Differential Limiting Amplifier, LA302Z
PIN ARRANGEMENTS AND PACKAGE INFORMATION
• Unit: mm
• Package Format: 16-pin QFN
• Package Size: 3 mm x 3 mm
• Pin Pitch: 0.5 mm
3
VEE
4
IN
VREF
ENVP
VCC
EUVIS
302Z
VEE
12
OP
11
VEE
10
ON
VEE
IP
13
VCC
2
14
CC
Pin1
VEE
15
VCS
1
16
LOS
Top View
5
6
7
8
9
Metal
Lead
3
0.025
Seating
Plane
3
0.5
1.45
1.45
0.4
0.23
0.9
Bottom View
Rev. 8B4_C, 11/14/08
Side View
4
Euvis
Differential Limiting Amplifier, LA302Z
TYPICAL CONNECTION
Reference Output
Voltage Envelope
VCC
R1
C2
C3
C4
ENVP
VREF
LOS
C1
VCC
Lost-of-Signal
Detector
Pin1
VEE
VEE
EUVIS
302Z
CB2
IP
VEE
CB1
CB3
T3
OP
RF
Outputs
VEE
CB4
IN
T4
VEE
ON
VCS
T1
VCC
RF
Inputs
CC
T2
VCC
C7
VR1
C5
C6
Notes:
VCC is +5 V
VEE’s are connected to power supply and package ground
Center pad of package is connected to ground
T1~ T4: 50-Ω transmission lines
VR1: 50-kΩ potentiometer
R1: 1-kΩ surface-mount resistor
C1 ~ C5 and C7: 100-nF surface-mount capacitors
C6: 10-µF capacitor
CB1 ~ CB4: 100-nF by-pass surface-mount capacitors
Rev. 8B4_C, 11/14/08
5
Euvis
Differential Limiting Amplifier, LA302Z
EYE DIAGRAM MEASUREMENT
The following figures show the typical eye diagrams with differential inputs of 2 Vpp, 500
mVpp, 50 mVpp and 5mVpp. The measurements are with 10-Gb/s 231-1 pseudo-random bit
sequences.
Vin: 2 VPP
375 mVPP
Vin: 500 mVPP
375 mVPP
Vin: 50 mVPP
375 mVPP
Vin: 5 mVPP
285 mVPP
The minimum sensitivity is tested with a 2.5 mVPP single-ended input at 85°C, 25°C and
-40°C, respectively. The bit error rate (BER) is measured less than 10-12 with 10-Gb/s 2311 pseudo-random bit sequences.
AT 85 °C
Rev. 8B4_C, 11/14/08
6
Euvis
Differential Limiting Amplifier, LA302Z
At 25°C
At –40 oC
Rev. 8B4_C, 11/14/08
7
Euvis
Differential Limiting Amplifier, LA302Z
Euvis
Ordering Information:
Email to: [email protected]
Or call: (805) 583-9888 x108 Sales Department
Or fax: (805) 583-9889
The information contained in this document is based on product test results. Characteristic data and other
specifications are subject to change without notice. Customers are advised to confirm information in this
advanced datasheet prior to using this information or placing the order.
Euvis Inc. does not assume any liability arising from the application or use of any product or circuit
described herein, neither does it convey any license under its patents or any other rights.
Rev. 8B4_C, 11/14/08
8