High Speed, Triple Differential

Receiver with Comparators

AD8143

Rev. 0

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FEATURES

High speed

160 MHz large signal bandwidth

High CMRR: 65 dB @ 10 MHz

High differential input impedance: 5 MΩ

Input common-mode range: ±10.5 V (±12 V supplies)

User-adjustable gain

Wide power supply range: +5 V to ±12 V

Fast settling: 8 ns to 1%

Disable feature

Low offset: ±3.4 mV on 5 V supply

2 on-chip comparators

Small packaging: 32-lead, 5 mm × 5 mm LFCSP

APPLICATIONS

RGB video receivers

KVM (keyboard-video-mouse)

UTP (unshielded twisted pair) receivers

PIN CONFIGURATION

REF_G

GND

IN+_G

FB_G

REF_R

IN–_G

GND

FB_R

OUT_B

GND

OUT_R

OUT_G

COMPB_IN+

GND

COMPB_IN–

AD8143

A

B

32

31

30

29

28

27

26

25

9

10

11121314

1516

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

Figure 1.

GENERAL DESCRIPTION

The AD8143 is a triple, low cost, differential-to-

single-ended receiver specifically designed for

receiving red-green-blue (RGB) signals over twisted

pair cable. It can also be used for receiving any type of

analog signal or high speed data transmission. Two

auxiliary comparators are provided to receive digital

or sync signals. The AD8143 can be used in conjunction

with the AD8133 and AD8134 triple, differential

drivers to provide a complete low cost solution for

RGB over Category-5 UTP cable applications,

including KVM.

The excellent common-mode rejection (65 dB @

10 MHz) of the AD8143 allows for the use of low cost

unshielded twisted pair cables in noisy environments.

The AD8143 has a wide power supply range from single +5 V

supply to ±12 V, which allows for a wide common-mode range.

The wide common-mode input range of the AD8143 maintains

signal integrity in systems where the ground potential is a few

volts different between the drive and receive ends without the

use of isolation transformers.

The AD8143 is stable at a gain of 1. Closed-loop gain is easily

set using external resistors.

The AD8143 is available in a 5 mm × 5 mm, 32-lead LFCSP and

is rated to work over the extended industrial temperature range

of −40°C to +85°C.