AD7721 datasheet(5/16 Pages) AD

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AD7721

REV. A

–5–

ABSOLUTE MAXIMUM RATINGS

(TA = +25°C unless otherwise stated)

DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V

AGND to DGND . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V

Digital Input Voltage to DGND . . . –0.3 V to DVDD + 0.3 V

Analog Input Voltage to AGND . . . . –0.3 V to AVDD + 0.3 V

Input Current to Any Pin Except Supplies2

. . . . . . .

±10 mA

Operating Temperature Range

Industrial (A Version) . . . . . . . . . . . . . . . . . –40

°C to +85°C

Extended (S Version) . . . . . . . . . . . . . . . . –55

°C to +125°C

Storage Temperature Range . . . . . . . . . . . . –65

°C to +150°C

Maximum Junction Temperature . . . . . . . . . . . . . . . +150

°C

Plastic Package

JA Thermal Impedance

. . . . . . . . . . . . . . . . . . . . . 74

°C/W

Lead Temperature, Soldering (10 sec) . . . . . . . . . . +260

°C

Cerdip Package

JA Thermal Impedance

. . . . . . . . . . . . . . . . . . . . . 51

°C/W

Lead Temperature, Soldering (10 sec) . . . . . . . . . . +300

°C

SOIC Package

JA Thermal Impedance

. . . . . . . . . . . . . . . . . . . . . 72

°C/W

Lead Temperature, Soldering

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215

°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220

°C

NOTES

1Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those listed in the operational

sections of this specification is not implied. Exposure to absolute maximum

rating conditions for extended periods may affect device reliability.

2Transient currents of up to 100 mA will not cause SCR latchup.

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although this device features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

ORDERING GUIDE

Model

Temperature Range

Package Option*

AD7721AN

–40

°C to +85°C

N-28

AD7721AR

–40

°C to +85°C

R-28

AD7721SQ

–55

°C to +125°C

Q-28

*N = Plastic DIP; R = 0.3" Small Outline IC (SOIC); Q = Cerdip.

PIN CONFIGURATION

TOP VIEW

(Not to Scale)

AD7721

SCLK/DB7

DVAL/

SYNC

DB6

DB8

DB9

RFS/DB10

VIN1

VIN2

AGND

SDATA/DB11

DGND

DSUBST

DGND

STBY/DB0

DVDD

AVDD

AGND

REFIN

CAL/DB1

UNI/DB2

DB3

DB4

SYNC/DB5

DRDY

CLK

WARNING!

ESD SENSITIVE DEVICE

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