AD7836

–12–

REV. A

+5V

8/10-BIT

DAC

GND

–5V

LOGIC LEVEL

SHIFT

GND

SCLK

SDATA

CONTROLLER

DATA BUS

SCLK

DIN

FSIN/CS

ADDR BUS

0V to -5V

0V to 5V

8/10-BIT

DAC

SCLK

DIN

FSIN/CS

ADDR

DECODER

AD7836

*

AGND

DATA BUS

A0,A1,A2

Figure 22. Programmable Reference Generation for the AD7836

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

44-Lead MQFP (S-44)

0.548 (13.925)

0.546 (13.875)

0.033 (0.84)

0.029 (0.74)

0.016 (0.41)

0.012 (0.30)

TOP VIEW

(PINS DOWN)

1

33

34

44

11

12

23

22

0.398 (10.11)

0.390 (9.91)

0.083 (2.11)

0.077 (1.96)

0.040 (1.02)

0.032 (0.81)

0.040 (1.02)

0.032 (0.81)

SEATING

PLANE

0.096 (2.44)

MAX

0.037 (0.94)

0.025 (0.64)

8

0.8

these DACs can be operated with supplies of 0 V and a –5 V,

to –5 V. Now these can be used to provide the negative refer-

the digital signals driving the DACs need to be level shifted

from the 0 V to +5 V range to the –5 V to 0 V range. Figure 22

shows a typical application circuit to provide programmable ref-

erence capabilities for the AD7836.