18-Channel Gamma Buffer

with Regulator

ADD8709

Rev. 0

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However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

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Fax: 781.326.8703

© 2004 Analog Devices, Inc. All rights reserved.

FEATURES

Integrated voltage regulator

Single-supply operation: 7.5 V to 16.5 V

Continuous current drive: 15 mA

High peak output current: 150 mA

Low offset voltage: 15 mV max

Output voltage stable under transient load conditions

APPLICATIONS

TFT LCD monitor panels

TFT LCD TV panels

GENERAL DESCRIPTION

The ADD8709 is an 18-channel gamma reference for use in

high-resolution TFT LCD monitor and TV panels. The output

buffers feature low offset voltage and high current drive under

transient load conditions to provide a more accurate and stable

swing to GND, increasing the overall range of the curve. An

on-board voltage regulator is available for external applications.

Here again, external component costs are reduced and the

quality of the gray scale is increased.

The ADD8709 is specified over the temperature range of

–40°C to +100°C and comes in a robust, low profile quad

flat package.

FUNCTIONAL BLOCK DIAGRAM

18

18

13

14

15

16

17

18

19

20

21

22

23

24

48

47

46

45

44

43

42

41

40

39

38

37

1

2

3

4

5

6

7

8

9

10

11

12

36

35

34

33

32

31

30

29

28

27

26

25

Figure 1. 48-Lead LQFP