6-Channel, Muxed Input

Line Inversion LCD Gamma Buffer

ADD8506

Rev. 0

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FEATURES

PIN CONFIGURATION DIAGRAM

Single-supply operation: 3.3 V to 6.5 V

INA1

1

VCC1

24

INB1

2

OUT1

23

INA2

3

OUT2

22

INB2

4

OUT3

21

INA3

5

VCC2

20

INB3

6

A/B

19

INA4

7

GND

18

INB4

8

GND

17

INA5

9

OUT4

16

OUT5

15

OUT6

14

VCC3

13

Rail-to-rail input, rail-to-rail output

High output current: 380 mA

Low supply current: 3.9 mA

Stable with 1 nF loads

Wide temperature range: −40°C to +105°C

24-lead, Pb-free, TSSOP package

APPLICATIONS

LCD line inversion gamma references

Car navigation panels

Personal media player panels

Figure 1.

GENERAL DESCRIPTION

The ADD8506 has 6-channel LCD gamma reference buffers

designed to drive column driver gamma inputs in line

inversion panels. Each buffer channel has an A/B input to

select between two gamma voltage curves. These buffer

channels drive the resistor ladders of LCD column drivers

for gamma correction. The ADD8506 outputs have high

slew rates and output drives that increase the stability of the

reference ladder, resulting in optimal gray scale and visual

performance.

The ADD8506 is specified over the −40°C to +105°C

temperature range. It is available in a 24-lead thin shrink small

outline (TSSOP), surface-mount, Pb-free package.