AD5725 Ver la hoja de datos (PDF) - Analog Devices

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AD5725

Quad, 12-Bit, Parallel Input, Unipolar/Bipolar, Voltage Output DAC

Analog Devices 

AD5725

Figure 29 shows the AD5725 configured for −10 V to 0 V

operation. An ADR01 and OP1177 are configured to produce a

−10 V output, which is connected directly to VREFP for the

reference voltage.

+15V

U1

0.1µF

10µF

AVDD

VREFP

AD5725

VREFN

AVSS

+15V

VIN

VOUT

ADR01

TEMP TRIM

GND

+15V

0.2µF

U2

V+

OP1177

V–

0.1µF

10µF

–15V

0V TO –10V OPERATION

–15V

Figure 29. Unipolar −10 V Operation

Data Sheet

SINGLE +5 V SUPPLY OPERATION

For operation with a +5 V supply, the reference voltage should

be set between +1.0 V and +2.5 V for optimum linearity. Figure 30

shows an ADR03 used to supply a +2.5 V reference voltage. The

headroom of the reference and DAC are both sufficient to support

a +5 V supply with ±5 V tolerance. AVDD and VL should be

connected to the same supply. Separate bypassing to each pin

should be used.

+5V

10µF

0.01µF

+15V

INPUT

OUTPUT

ADR03

TRIM

GND

10kΩ

VREFP

0.2µF

VREFN

0V TO 2.5V OPERATION

SINGLE 5V SUPPLY

AVDD

AD5725

AVSS

–15V

0.1µF

10µF

0.1µF

10µF

Figure 30. +5 V Single-Supply Operation

Rev. C | Page 18 of 20

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