4-, 5-, 6-Channel, Muxed Input Line
Inversion LCD Gamma Buffers
ADD8504/ADD8505/ADD8506
Rev. D
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FEATURES
Single-supply operation: 3.3 V to 6.5 V
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
16-, 20-, and 24-lead, Pb-free, TSSOP packages
Qualified for automotive applications
APPLICATIONS
LCD line inversion gamma references
Car navigation panels
Personal media player panels
Automotive infotainment systems
GENERAL DESCRIPTION
The ADD8504, ADD8505, and ADD8506 are 4-, 5-, and
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 ADD8504/
ADD8505/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 ADD8504/ADD8505/ADD8506 are specified over the
−40°C to +105°C temperature range. They are available, respec-
tively, in 16-, 20-, and 24-lead thin shrink small outline (TSSOP),
surface-mount, Pb-free packages. The ADD8506 is also offered
in a leaded TSSOP.
The ADD8506WWARUZR7 is the automotive grade version.
PIN CONFIGURATION DIAGRAMS
INA1
1
OUT1
16
INB1
2
OUT2
15
INA2
3
VCC1
14
INB2
4
A/B
13
INA3
5
GND
12
INB3
6
GND
11
INA4
7
OUT3
10
INB4
8
OUT4
9
05549-001
Figure 1. ADD8504, 4-Channel Buffer
INA1 1 VCC120
INB1 2 OUT119
INA2 3 OUT218
INB2 4 OUT317
INA3 5 VCC216
INB3 6 A/B15
INA4 7 GND14
INB4 8 GND13
INA5
9
OUT4
12
INB5
10
OUT5
11
05549-002
Figure 2. ADD8505, 5-Channel Buffer
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
INB5
10
OUT5
15
INA6
11
OUT6
14
INB6
12
VCC3
13
05549-003
Figure 3. ADD8506, 6-Channel Buffer