AD8509 Datasheet, PDF (1/8 Pages) Analog Devices – 9- and 11-Channel, Muxed Input LCD Reference Drivers

FEATURES
Single-supply operation: 3.3 V to 6.5 V
High output current: 300 mA
Low supply current: 6 mA
Stable with 1000 pF loads
Pin-compatible with LMC6009
Pin-compatible with CL-FP6131
48-lead, Pb-free, TSSOP package
APPLICATION
LCD line inversion gamma references
GENERAL DESCRIPTION
The AD8509 and AD8511 are 9-channel and 11-channel LCD
reference buffers, respectively, designed to drive 64 gray scale
column drivers. Each buffer has an A/B input to select between
two voltages for LCD displays. These buffers drive the resistor
ladders of LCD column drivers for gamma correction. These
LCD drivers have higher slew rates and higher output drive
currents than similar competitive parts. This increases the
stability of the reference ladder, resulting in better gray scale
and visual performance.
The AD8509 and AD8511 are specified over the −40°C to +85°C
temperature range. They are available in 48-lead, thin shrink
small outline (TSSOP), surface-mount, Pb-free packages in tape
and reel.
9- and 11-Channel, Muxed Input
LCD Reference Buffers
AD8509/AD8511
FUNCTIONAL BLOCK DIAGRAM
INA1
INB1
INA2
INB2
VO1
VO2
INA11
INB11
A/B
Figure 1.
VO11
PIN CONFIGURATIONS
NC 1
48 NC
NC 2
47 NC
NC 3
46 NC
INA1 4
45 NC
INB1 5
44 VCC
INA2 6
43 GND
INB2 7
42 VO1
INA3 8
41 VO2
INB3 9
40 VO3
INA4 10
39 VO4
INB4 11
INA5 12
INB5 13
AD8509
TOP VIEW
(Not to Scale)
38 V_CC
37 _GND
36 VO5
INA6 14
35 VO6
INB6 15
34 VO7
INA7 16
33 VO8
INB7 17
32 VO9
INA8 18
31 GND
INB8 19
30 V_CC
INA9 20
29 _A/B
INB9 21
28 NC
NC 22
27 NC
NC 23
26 NC
NC 24
25 NC
NC 1
48 NC
INA1 2
47 VO1
INB1 3
46 NC
INA2 4
45 NC
INB2 5
44 VCC
INA3 6
43 GND
INB3 7
42 VO2
INA4 8
41 VO3
INB4 9
40 VO4
INA5 10
39 VO5
INB5 11
INA6 12
INB6 13
AD8511
TOP VIEW
(Not to Scale)
38 V_CC
37 GND
36 VO6
INA7 14
35 VO7
INB7 15
34 VO8
INA8 16
33 VO9
INB8 17
32 VO10
INA9 18
31 GND
INB9 19
30 V_CC
INA10 20
29 A/B
INB10 21
28 NC
NC 22
27 NC
INA11 23
26 VO11
INB11 24
25 NC
NC = NO CONNECT
NC = NO CONNECT
Figure 2. AD8509 and AD8511 48-Lead TSSOP (RU Suffix)
Rev. B
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