Complete Quad, 14-Bit, High Accuracy,

Serial Input, Bipolar Voltage Output DAC

AD5744R

Rev. A

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FEATURES

Complete quad, 14-bit digital-to-analog converter (DAC)

Programmable output range: ±10 V, ±10.2564 V, or

±10.5263 V

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

Low noise: 60 nV/√Hz

Settling time: 10 μs maximum

Integrated reference buffers

Internal reference: 10 ppm/°C maximum

On-chip die temperature sensor

Output control during power-up/brownout

Programmable short-circuit protection

Simultaneous updating via LDAC

Asynchronous CLR to zero code

Digital offset and gain adjust

Logic output control pins

DSP-/microcontroller-compatible serial interface

Temperature range: −40°C to +85°C

iCMOS process technology

APPLICATIONS

Industrial automation

Open-loop/closed-loop servo control

Process control

Data acquisition systems

Automatic test equipment

Automotive test and measurement

High accuracy instrumentation

GENERAL DESCRIPTION

The AD5744R is a quad, 14-bit, serial input, bipolar voltage output

DAC that operates from supply voltages of ±11.4 V to ±16.5 V.

Nominal full-scale output range is ±10 V. The AD5744R provides

integrated output amplifiers, reference buffers, and proprietary

power-up/power-down control circuitry. The part also features

a digital I/O port, programmed via the serial interface, and an

analog temperature sensor. The part incorporates digital offset

and gain adjust registers per channel.

The AD5744R is a high performance converter that provides

guaranteed monotonicity, integral nonlinearity (INL) of ±1 LSB,

low noise, and 10 μs settling time. The AD5744R includes an on-

chip 5 V reference with a reference temperature coefficient of

10 ppm/°C maximum. During power-up when the supply voltages

are changing, VOUTx is clamped to 0 V via a low impedance path.

The AD5744R is based on the iCMOS® technology platform, which

is designed for analog systems designers within industrial/instru-

mentation equipment OEMs who need high performance ICs at

higher voltage levels. iCMOS enables the development of analog

ICs capable of 30 V and operation at ±15 V supplies, while allowing

reductions in power consumption and package size, coupled with

increased ac and dc performance.

The AD5744R uses a serial interface that operates at clock rates

of up to 30 MHz and is compatible with DSP and microcontroller

interface standards. Double buffering allows the simultaneous

updating of all DACs. The input coding is programmable to either

twos complement or offset binary formats. The asynchronous clear

function clears all DAC registers to either bipolar zero or zero scale,

depending on the coding used. The AD5744R is ideal for both

closed-loop servo control and open-loop control applications. The

AD5744R is available in a 32-lead TQFP and offers guaranteed

specifications over the −40°C to +85°C industrial temperature

range (see Figure 1 for the functional block diagram).