AD5762R_08 datasheet, PDF - EEWORLD Datasheet

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AD5762R_08: Descriptioncomplete dual, 16-bit, high accuracy, serial input, bipolar voltage output dac; File Size550KB，32 Pages; ManufacturerADI; Websitehttps://www.analog.com

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complete dual, 16-bit, high accuracy, serial input, bipolar voltage output dac

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Complete Dual, 16-Bit, High Accuracy,

Serial Input, Bipolar Voltage Output DAC

AD5762R

FEATURES

Complete dual, 16-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

GENERAL DESCRIPTION

The AD5762R is a dual, 16-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 AD5762R 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 AD5762R is a high performance converter that provides

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

low noise, and 10 μs settling time. The AD5762R 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 AD5764R 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 AD5762R 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 AD5762R is ideal

for both closed-loop servo control and open-loop control appli-

cations. The AD5762R 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).

APPLICATIONS

Industrial automation

Open-loop/closed-loop servo control

Process control

Data acquisition systems

Automatic test equipment

Automotive test and measurement

High accuracy instrumentation

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

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

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

AD5762R

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Functional Block Diagram .............................................................. 3

Specifications..................................................................................... 4

AC Performance Characteristics ................................................ 6

Timing Characteristics ................................................................ 7

Absolute Maximum Ratings.......................................................... 10

Thermal Resistance .................................................................... 10

ESD Caution ................................................................................ 10

Pin Configuration and Function Descriptions ........................... 11

Typical Performance Characteristics ........................................... 13

Terminology .................................................................................... 19

Theory of Operation ...................................................................... 21

DAC Architecture ....................................................................... 21

Reference Buffers ........................................................................ 21

Serial Interface ............................................................................ 21

Simultaneous Updating via LDAC ........................................... 22

Transfer Function ....................................................................... 23

Asynchronous Clear (CLR) ....................................................... 23

Registers ........................................................................................... 24

Function Register ....................................................................... 24

Data Register ............................................................................... 25

Coarse Gain Register ................................................................. 25

Fine Gain Register ...................................................................... 25

Offset Register ............................................................................ 26

Offset and Gain Adjustment Worked Example ......................... 26

Design Features ............................................................................... 27

Analog Output Control ............................................................. 27

Digital Offset and Gain Control ............................................... 27

Programmable Short-Circuit Protection ................................ 27

Digital I/O Port ........................................................................... 27

Die Temperature Sensor ............................................................ 27

Local Ground Offset Adjust ...................................................... 27

Applications Information .............................................................. 28

Typical Operating Circuit ......................................................... 28

Layout Guidelines ........................................................................... 30

Galvanically Isolated Interface ................................................. 30

Microprocessor Interfacing ....................................................... 30

Evaluation Board ........................................................................ 31

Outline Dimensions ....................................................................... 32

Ordering Guide .......................................................................... 32

REVISION HISTORY

12/08—Revision 0: Initial Version

Rev. 0 | Page 2 of 32

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