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 VCC124
INB1 2 OUT123
INA2 3 OUT222
INB2 4 OUT321
INA3 5 VCC220
INB3 6 A/B19
INA4 7 GND18
INB4 8 GND17
INA5 9 OUT416
INB5 10 OUT515
INA6 11 OUT614
INB6 12 VCC313
05549-003
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.