Datasheet AD8129, AD8130 (Analog Devices)

Low Cost 270 MHz Differential Receiver Amplifiers AD8129/AD8130 FEATURES CONNECTION DIAGRAM High speed AD8129/ AD8130: 270 MHz, 1090 V/μs @ G = +1 AD8130 +IN 1 8 –IN AD8129: 200 MHz, 1060 V/μs @ G = +10 High CMRR –V 2 S 7 +VS + 94 dB min, dc to 100 kHz PD 3 6 OUT 80 dB min @ 2 MHz 70 dB @ 10 MHz REF 4 5 FB High input impedance: 1 MΩ differential
02464-001
Input common-mode range ±10.5 V
Figure 1.
Low noise
The AD8129/AD8130 are differential-to-single-ended amplifiers
AD8130: 12.5 nV/√Hz AD8129: 4.5 nV/√Hz
with extremely high CMRR at high frequency. Therefore, they
Low distortion, 1 V p-p @ 5 MHz
can also be effectively used as high speed instrumentation amps
AD8130, −79 dBc worst harmonic @ 5 MHz
or for converting differential signals to single-ended signals.
AD8129, −74 dBc worst harmonic @ 5 MHz User-adjustable gain
The AD8129 is a low noise, high gain (10 or greater) version
No external components for G = +1
intended for applications over very long cables, where signal
Power supply range +4.5 V to ±12.6 V
attenuation is significant. The AD8130 is stable at a gain of 1
Power-down
and can be used for applications where lower gains are required.
APPLICATIONS
Both have user-adjustable gain to help compensate for losses in the transmission line. The gain is set by the ratio of two resistor
High speed differential line receivers
values. The AD8129/AD8130 have very high input impedance
Differential-to-single-ended converters High speed instrumentation amps
on both inputs, regardless of the gain setting.
Level shifting GENERAL DESCRIPTION
The AD8129/AD8130 have excellent common-mode rejection The AD8129/AD8130 are designed as receivers for the (70 dB @ 10 MHz), allowing the use of low cost, unshielded transmission of high speed signals over twisted-pair cables to twisted-pair cables without fear of corruption by external noise work with the AD8131 or AD8132 drivers. Either can be used sources or crosstalk. The AD8129/AD8130 have a wide power for analog or digital video signals and for high speed data supply range from single +5 V to ±12 V, allowing wide common- transmission. mode and differential-mode voltage ranges while maintaining signal integrity. The wide common-mode voltage range enables
120
the driver-receiver pair to operate without isolation transformers
110
in many systems where the ground potential difference between
100
drive and receive locations is many volts. The AD8129/AD8130 have considerable cost and performance improvements over
90
op amps and other multiamplifier receiving solutions.
80 +VS RR (dB) 70 PD CM 3 60 1 VIN 7 8 50 6 VOUT 4 40 2 5 30 10k 100k 1M 10M 100M RG RF FREQUENCY (Hz)
02464-002 Figure 2. AD8129 CMRR vs. Frequency
–VS VOUT = VIN [1+(RF/RG)]
02464-003 Figure 3. Typical Connection Configuration
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Document Outline FEATURES APPLICATIONS CONNECTION DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY AD8129/AD8130 SPECIFICATIONS 5 V SPECIFICATIONS ±5 V SPECIFICATIONS ±12 V SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Maximum Power Dissipation ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS AD8130 FREQUENCY RESPONSE CHARACTERISTICS AD8129 FREQUENCY RESPONSE CHARACTERISTICS AD8130 HARMONIC DISTORTION CHARACTERISTICS AD8129 HARMONIC DISTORTION CHARACTERISTICS AD8130 TRANSIENT RESPONSE CHARACTERISTICS AD8129 TRANSIENT RESPONSE CHARACTERISTICS THEORY OF OPERATION OP AMP CONFIGURATION APPLICATIONS BASIC GAIN CIRCUITS TWISTED-PAIR CABLE, COMPOSITE VIDEO RECEIVER WITH EQUALIZATION USING AN AD8130 OUTPUT OFFSET/LEVEL TRANSLATOR RESISTORLESS GAIN OF 2 SUMMER CABLE-TAP AMPLIFIER POWER-DOWN EXTREME OPERATING CONDITIONS POWER DISSIPATION LAYOUT, GROUNDING, AND BYPASSING OUTLINE DIMENSIONS ORDERING GUIDE