AD760AQ

更新时间： 2024-11-18 22:38:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	326K
描述
16/18-Bit Self-Calibrating Serial/Byte DACPORT

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AD760AQ 数据手册

16/18-Bit Self-Calibrating

Serial/Byte DACPORT

AD760

FUNCTIONAL BLOCK DIAGRAM

FEATURES

±0.2 LSB (±0.00031%) Typ Peak DNL and INL

±0.5 LSB (±0.00076%) Typ Unipolar Offset, Bipolar Zero

17-Bit Monotonicity Guaranteed

18-Bit Resolution (in Serial Mode)

Complete 16/18-Bit D/A Function

On-Chip Output Amplifier

On-Chip Buried Zener Voltage Reference

Microprocessor Compatible

Serial or Byte Input

Double Buffered Latches

Asynchronous Clear Function

Serial Output Pin Facilitates Daisy Chaining

Pin Strappable Unipolar or Bipolar Output

Low THD+N: 0.005%

MSB/

18/16

SERIAL

LSB

OR OR

DB0 DB1 DB2

DB7

UNI/

BIP CLR

AD760

16/18-BIT

INPUT REGISTER

OR LBE

HBE

OUT

10k

SER

CLR

SPAN/

BIP

OFF

16/18-BIT DAC LATCH

LDAC

REF IN

MAIN DAC

RAM

OUT

9.95k

MUX

OUT

+10V

REF

REF OUT

CALIBRATION DAC

MUX Output Control on Power-Up and Supply Glitches

AGND

CALIBRATION SEQUENCER

PRODUCT DESCRIPTION

The AD760 is a complete 16/18-bit self-calibrating monolithic

DAC (DACPORT®) with onboard voltage reference, double

buffered latches and output amplifier. It is manufactured on

Analog Devices’ BiMOS II process. This process allows the fab-

rication of low power CMOS logic functions on the same chip

as high precision bipolar linear circuitry.

CALOK

CAL

–V

DGND

MUX output in a predetermined state by means of a digital and

analog power supply detection circuit. This is particularly use-

ful for robotic and industrial control applications.

Self-calibration is initiated by simply pulsing the CAL pin low.

The CALOK pin indicates when calibration has been success-

fully completed. The output multiplexer (MUX_OUT) can be used

to send the output to the bottom of the output range during

calibration.

The AD760 is available in a 28-pin, 600 mil cerdip package.

The AQ version is specified from –40°C to +85°C.

Data can be loaded into the AD760 as straight binary, serial

data or as two 8-bit bytes. In serial mode, 16-bit or 18-bit data

can be used and the serial mode input format is pin selectable,

to be MSB or LSB first. This is made possible by three digital

input pins which have dual functions (Pins 12, 13, and 14). In

byte mode the user can similarly define whether the high byte or

low byte is loaded first. The serial output (S_OUT) pin allows the

user to daisy chain several AD760s by shifting the data through

the input latch into the next DAC thus minimizing the number

of control lines required in a multiple DAC application. The

double buffered latch structure eliminates data skew errors and

provides for simultaneous updating of DACs in amulti-DAC

system.

= –10V TO +10V

OUT

0.75

= 2kΩ

= 1000pF

0.25

–0.25

–0.75

16384

32768

49152

65535

INPUT CODE – Decimal

The asynchronous CLR function can be configured to clear the

output to minus full-scale or midscale depending on the state of

Pin 17 when CLR is strobed. The AD760 also powers up with the

Typical Integral Nonlinearity

REV. A

DACPORT is a registered trademark of Analog Devices, Inc.

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 617/329-4700

Fax: 617/326-8703

12 3 4 5 6 7...12

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