DAC7568 datasheet(37/58 Pages) TI

37 / 58 page

DAC7568

DAC8168

DAC8568

www.ti.com.................................................................................................................................................................................................................................................. SBAS430A – JANUARY 2009 – REVISED APRIL 2009

Table 10. Control Matrix for the DAC7568, DAC8168, and DAC8568 (continued)

DB30-

DB16-

DB31

DB28

DB27

DB26

DB25

DB24

DB23

DB22

DB21

DB20

DB19

DB18

DB17

DB10

DB9

DB8

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

DESCRIPTION

Don't

D13-

Care

D16

D15

D14

GENERAL DATA FORMAT FOR 16-BIT DAC8568

Don't

D11-

Care

D14

D13

D12

GENERAL DATA FORMAT FOR 14-BIT DAC8168

Don't

Care

D12

D11

D10

D9-D3

GENERAL DATA FORMAT FOR 12-BIT DAC7568

Power-Down Commands

DAC

Power-up DAC A, B, C, D, E, F, G, H by setting

respective bit to '1'

DAC

Power-down DAC A, B, C, D, E, F, G, H, 1k

Ω to

GND by setting respective bit to '0'

DAC

Power-down DAC A, B, C, D, E, F, G, H, 100k

Ω to

GND by setting respective bit to '0'

DAC

Power-down DAC A, B, C, D, E, F, G, H, High-Z to

GND by setting respective bit to '0'

Internal Reference Commands

Power down internal reference - static mode

(default), must use external reference to operate

device; see Table 2

Power up internal reference - static mode; see

Table 1 (NOTE: When all DACs power down, the

reference powers down; when any DAC powers up,

the reference powers up)

Power up internal reference - flexible mode; see

Table 3 (NOTE: When all DACs power down, the

reference powers down; when any DAC powers up,

the reference powers up)

Power up internal reference all the time regardless

of state of DACs - flexible mode; see Table 4

Power down internal reference all the time

regardless of state of DACs - flexible mode; see

Table 5 (NOTE: External reference must be used to

operate device)

Switching internal reference mode from flexible

mode to static mode

Reserved Bits