ADD8506

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APPLICATIONS

The ADD8506 has CMOS buffers with A/B inputs to select

between two different reference voltages set up by an external

resistor ladder. Input bias currents are orders of magnitude less

than competitive parts. This allows the use of a very large

resistor ladder to save supply current.

Power supply pins on the ADD8506 have multiple ground

currents that these buffers deliver, it is recommended that all

Table 5. MUX Function

The buffer outputs are designed to drive resistive or capacitive

loads. Therefore, to attain the best display performance, do not

use resistors in series with these outputs. Outputs have high

slew rates and 6 μs settling times. Each output delivers a

minimum of 120 mA, ensuring a fast response to varying loads.

A/B Select

Input

Logic High

INAx

Logic Low

INBx

RB1

RB2

RB3

RB4

RB5

RB6

5V

5V

RB7

RA1

RA2

RA3

RA4

RA5

RA6

RA7

0.1

μF

0.1

μF

NOTES

1. RAx RESISTORS ARE USED TO SET POSITIVE INVERSION GAMMA VOLTAGES.

2. RBx RESISTORS ARE USED TO SET NEGATIVE INVERSION GAMMA VOLTAGES.

2

23

24

TO COLUMN

DRIVERS

VCOM

(INVERTING SIGNAL)

5V

0.1

μF

1

3

22

4

21

5

20

6

19

7

18

8

17

9

16

10

15

10

10

14

11

12

13

Figure 7. Typical Application