TLC7225C, TLC7225I

QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS

SLAS109B – OCTOBER 1996 – REVISED FEBRUARY 2001

10

POST OFFICE BOX 655303

APPLICATION INFORMATION

Table 2. TLC7225 Truth Table

CONTROL INPUTS

FUNCTION

WR

LDAC

FUNCTION

H

H

No operation. Device not selected

L

H

Input register of selected DAC is transparent.

↑

H

Input register of selected DAC is latched.

H

L

All four DAC registers are transparent (i.e., outputs respond to data

held in respective input registers) input registers are latched.

H

↑

All four DAC registers are latched.

L

L

DAC registers and selected input register are transparent. Output

follows input data for selected channel.

19

18

17

A0

A1

WR

To Latch A

To Latch B

To Latch C

To Latch D

Figure 5. Input Control Logic