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AD7722AS

16-Bit, 195 kSPS CMOS, Σ-Δ ADC

Analog Devices 

AD7722

ABSOLUTE MAXIMUM RATINGS1

(TA = 25°C, unless otherwise noted.)

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

AVDD, AVDD1 to AGND . . . . . . . . . . . . . . . . . . –0.3 V to +7 V

AVDD, AVDD1 to DVDD . . . . . . . . . . . . . . . . . . . –1 V to +1 V

AGND, AGND1 to DGND . . . . . . . . . . . . . –0.3 V to +0.3 V

Digital Inputs to DGND . . . . . . . . . . –0.3 V to DVDD + 0.3 V

Digital Outputs to DGND . . . . . . . . . –0.3 V to DVDD + 0.3 V

VIN(+), VIN(–) to AGND . . . . . . . . . . –0.3 V to AVDD + 0.3 V

REF1 to AGND . . . . . . . . . . . . . . . . –0.3 V to AVDD + 0.3 V

REF2 to AGND . . . . . . . . . . . . . . . . –0.3 V to AVDD + 0.3 V

DGND, AGND1, AGND2 . . . . . . . . . . . . . . . . . . . . . . ± 0.3 V

Input current to any pin except the supplies2 . . . . . . . . ± 10 mA

Operating Temperature Range . . . . . . . . . . . –40°C to +85°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C

θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . 72°C/W

θJC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . 20°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

permanent damage to the device. This is a stress rating only; functional opera -

tion of the device at these or any other conditions above those indicated in the

operational section of this specification is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

2Transient currents up to 100 mA will not cause SCR latch-up.

ORDERING GUIDE

Model

Package

Temperature Description

Package

Option

AD7722AS

–40°C to +85°C 44-Lead MQFP S-44B

EVAL-AD7722CB

Evaluation Board

TO

OUTPUT

PIN

CL

50pF

IOL

1.6mA

1.6V

IOH

200␮A

Figure 1. Load Circuit for Timing Specifications

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 the AD7722 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.

–4–

REV. B

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