AD5724R/AD5734R/AD5754R

Preliminary Technical Data

Rev. PrC | Page 28 of 32

OUTPUT RANGE SELECT REGISTER

The output range select register is addressed by setting the three REG bits to 001. The DAC address bits select the DAC channel, while,

the range bits (R2, R1, R0) select the required output range (see Table 23 and Table 24).

Table 23. Programming the Required Output Range

MSB

LSB

REG2

REG1

REG0

A2

A1

A0

DB15 to DB3

DB2

DB1

DB0

0

0

1

DAC Address

Don’t Care

R2

R1

R0

Table 24. Output Range Options

R2

R1

R0

Output Range (V)

0

0

0

+5

0

0

1

+10

0

1

0

+10.8

0

1

1

±5

1

0

0

±10

1

0

1

±10.8

CONTROL REGISTER

The control register is addressed by setting the three REG bits to 011. The value written to the address and data bits determines the

control function selected. The control register options are shown in Table 25 and Table 26.

Table 25. Control Register Format

MSB

LSB

REG2

REG1

REG0

A2

A1

A0

DB15 to DB4

DB3

DB2

DB1

DB0

0

1

1

0

0

0

NOP, Data = Don’t Care

REG2

REG1

REG0

A2

A1

A0

DB15 to DB4

DB3

DB2

DB1

DB0

0

1

1

0

0

1

Don’t Care

TSD ENABLE

CLAMP ENABLE

CLR SELECT

SDO DISABLE

REG2

REG1

REG0

A2

A1

A0

DB15 to DB4

DB3

DB2

DB1

DB0

0

1

1

1

0

0

CLEAR, Data = Don’t Care

REG2

REG1

REG0

A2

A1

A0

DB15 to DB4

DB3

DB2

DB1

DB0

0

1

1

1

0

1

LOAD, Data = Don’t Care

Table 26. Control Register Functions

Option

Description

NOP

No operation instruction used in readback operations.

CLEAR

Addressing this function sets the DAC registers to the clear code and updates the outputs.

LOAD

Addressing this function updates the DAC registers and consequently, the DAC outputs.

SDO DISABLE

Set by the user to disable the SDO output. Cleared by the user to enable the SDO output (default).

CLR SELECT

See Table 27 for a description of the CLR SELECT operation.

CLAMP ENABLE

Set by the user to enable the current limit clamp (default). The channel does not power down on detection of

overcurrent; the current is clamped at 20 mA.

Cleared by the user to disable the current-limit clamp. The channel powers down on detection of overcurrent.

TSD ENABLE

Set by the user to enable the thermal shutdown feature. Cleared by the user to disable the thermal shutdown

feature (default).

Table 27. CLR Select Options

CLR SELECT

Output CLR Value

Setting

Unipolar Output Range

Bipolar Output Range

0

0 V

0 V

1

Mid-Scale

Negative Full-Scale