High Speed, Triple Differential Receiver

with Comparators

AD8145

Rev. A

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FEATURES

0.1 dB flatness out to 75 MHz

High CMRR: 69 dB @ 10 MHz

High differential input impedance: 1 MΩ

Wide input common-mode range: ±3.5 V (±5 V supplies)

On-chip, gain setting resistors can be configured for gain of 1 or 2

Fast settling: 15 ns to 0.1% @ 2 V p-p

Low input referred noise: 13 nV/√Hz

Disable feature

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

AEC-Q10 qualified (AD8145W)

APPLICATIONS

RGB video receivers

YPbPr video receivers

Keyboard, video, mouse (KVM)

Unshielded twisted pair (UTP) receivers

Automotive driver assistance (AD8145W)

Automotive Infotainment (AD8145W)

FUNCTIONAL BLOCK DIAGRAM

OUT_G

OUT_B

OUT_R

COMPB_IN+

COMPB_IN–

GND

GND

1

2

3

4

5

6

7

8

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

GND

REF_G

GAIN_G

IN+_G

IN–_G

REF_R

GAIN_R

GND

9

10111213141516

+

–

+

–

–

+

–

C

RR

A

B

C

C

RR

R

R

AD8145

Figure 1.

GENERAL DESCRIPTION

The AD8145 is a triple, low cost, differential-to-single-ended

receiver specifically designed for receiving red-green-blue (RGB)

video signals over twisted pair cable or differential printed circuit

board (PCB) traces. It can also be used to receive any type of

analog signal or high speed data transmission. Two auxiliary

comparators with hysteresis are provided that can be used to

decode video sync signals, which are encoded on the received

common-mode voltages, to receive digital signals or as general-

purpose comparators. The AD8145 can be used in conjunction

with the AD8133 or 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 (69 dB @ 10 MHz) of

the AD8145 allows for the use of low cost, unshielded twisted

pair cables in noisy environments.

The AD8145 can be configured for a differential-to-single-ended

gain of 1 or 2 by connecting the GAIN_x pin of each channel to

its respective output (G = 1) or connecting it to a reference voltage

(G = 2), which is normally grounded.

A REF_x input is provided on each channel that allows designers to

level shift the output signals.

The AD8145W is the automotive grade version that is qualified

per the AEC-Q100 for use in automotive applications. See the

Automotive Products section for more details.

The AD8145 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 +105°C.