AD5791 View Datasheet(PDF) - Analog Devices

Part Name

Description

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AD5791

1 ppm 20-Bit, ±1 LSB INL, Voltage Output DAC

Analog Devices 

Data Sheet

AD5791

Software Control Register

This is a write only register in which writing a 1 to a particular bit has the same effect as pulsing the corresponding pin low.

Table 14. Software Control Register

MSB

DB23

DB22

DB21

DB20

R/W

Register address

0

1

0

0

1 The CLR function has no effect if the LDAC pin is low.

2 The LDAC function has no effect if the CLR pin is low.

DB19

DB3

Reserved

DB2

DB1

Software control register data

RESET

CLR1

LSB

DB0

LDAC2

Table 15. Software Control Register Functions

Function Description

LDAC

Setting this bit to a 1 updates the DAC register and consequently the DAC output.

CLR

Setting this bit to a 1 sets the DAC register to a user defined value (see Table 13) and updates the DAC output. The output

value depends on the DAC register coding that is being used, either binary or twos complement.

RESET

Setting this bit to a 1 returns the AD5791 to its power-on state.

Rev. D | Page 23 of 28

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