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AD5726

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

Analog Devices 

Data Sheet

Quad, 12-Bit, Serial Input,

Unipolar/Bipolar, Voltage Output DAC

AD5726

FEATURES

+5 V to ±15 V operation

Unipolar or bipolar operation

±1 LSB maximum INL error, ±1 LSB maximum DNL error

Guaranteed monotonic over temperature

Double-buffered inputs

Asynchronous CLR to zero scale/midscale

Operating temperature range: −40°C to +125°C

iCMOS process technology

APPLICATIONS

Industrial automation

Closed-loop servo control, processcontrol

Automotive test and measurement

Programmable logic controllers

GENERAL DESCRIPTION

The AD5726 is a quad, 12-bit, serial input, voltage output

digital-to-analog converter (DAC) fabricated on Analog

Devices, Inc., iCMOS® process technology1 that offers

guaranteed monotonicity and integral nonlinearity (INL)

of ±1 LSB maximum.

Output voltage swing is set by two reference inputs, VREFP and

VREFN. The DAC offers a unipolar positive output range when

the VREFN input is set to 0 V and the VREFP input is set to a positive

voltage. A similar configuration with VREFP at 0 V and VREFN at a

negative voltage provides a unipolar negative output range.

Bipolar outputs are configured by connecting both VREFP and

VREFN to nonzero voltages. This method of setting output voltage

ranges has advantages over the bipolar offsetting methods

because it is not dependent on internal and external resistors

with different temperature coefficients.

The AD5726 uses a serial interface that operates at clock rates up to

30 MHz and is compatible with DSP and microcontroller interface

standards. The asynchronous CLR function clears all DAC

registers to a user-selectable zero-scale or midscale output.

The AD5726 is available in 16-lead SSOP, 20-lead SSOP, and

16-lead SOIC packages. It can be operated from a wide variety

of supply and reference voltages with supplies ranging from

single +5 V to ±15 V, and references ranging from +2.5 V to

±10 V. Power dissipation is less than 240 mW with ±15 V

supplies and only 30 mW with a +5 V supply. Operation is

specified over the temperature range of −40°C to +125°C.

A similar device, also available from Analog Devices is

the AD5725, which is a quad, 12-bit, parallel input, unipolar/

bipolar, voltage output DAC.

FUNCTIONAL BLOCK DIAGRAM

AVSS AVDD

VREFP

SDIN

SCLK

CS

12

I/O

REGISTER

AND

CONTROL

LOGIC

AD5726

INPUT 12 DAC 12

REG A

REG A

DAC A

INPUT 12 DAC 12

REG B

REG B

DAC B

INPUT 12 DAC 12

REG C

REG C

DAC C

INPUT 12 DAC 12

REG D

REG D

DAC D

GND

CLR CLRSEL LDAC

Figure 1.

VREFN

VOUTA

VOUTB

VOUTC

VOUTD

1 For analog systems designers within industrial/instrumentation equipment OEMs who need high performance ICs at higher voltage levels, iCMOS is a technology

platform that enables the development of analog ICs capable of 30 V and operating at ±15 V supplies while allowing dramatic reductions in power consumption and

package size, and increased ac and dc performance.

Rev. C

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rights of third parties that may result from its use. Specifications subject to change without notice. No

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