Datasheet Analog Devices AD8509

9-and 11-Channel, Muxed Input
LCD Reference Buffers
AD8509/AD8511
PIN CONFIGURATIONS 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/LFCSP packages NC 1 48 NC NC 1 NC 2 47 NC INA1 2 47 VO1 NC 3 46 NC INB1 3 46 NC INA1 4 45 NC INA2 4 45 NC INB1 5 44 VCC INB2 5 44 VCC INA2 6 43 GND INA3 6 43 GND INB2 7 42 VO1 INB3 7 42 VO2 INA3 8 41 VO2 INA4 8 40 VO3 INB4 9 39 VO4 INA5 10 INB4 11 38 VCC INB5 11 38 VCC INA5 12 37 GND INA6 12 37 GND INB5 13 36 VO5 INB6 13 36 VO6 INA6 14 35 VO6 INA7 14 35 VO7 INB6 15 34 VO7 INB7 15 34 VO8 INA7 16 33 VO8 INA8 16 33 VO9 INB7 17 32 VO9 INB8 17 32 VO10 INA8 18 31 GND INA9 18 31 GND INB8 19 30 VCC INB9 19 30 VCC INA9 20 29 A/B INA10 20 29 A/B INB9 21 28 NC INB10 21 28 NC NC 22 27 NC NC 22 27 NC NC 23 26 NC INA11 23 26 VO11 NC 24 25 NC INB11 24 25 NC INB3 9 APPLICATION INA4 10 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. The 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. NC = NO CONNECT 41 VO3 AD8511
TOP VIEW
(Not to Scale) 40 VO4
39 VO5 NC = NO CONNECT Figure 2. AD8509 and AD8511 48-Lead TSSOP (RV Suffix) 48
47 …