AD7731(1997) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD7731
(Rev.:1997)

Low Noise, High Throughput 24-Bit Sigma-Delta ADC

Analog Devices 

AD7731

ABSOLUTE MAXIMUM RATINGS*

(TA = +25°C unless otherwise noted)

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

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

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

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

AGND to DGND . . . . . . . . . . . . . . . . . . . . . . –5 V to +0.3 V

AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . –2 V to +5 V

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

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

AIN/REF IN Current (Indefinite) . . . . . . . . . . . . . . . . . 30 mA

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

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

Output Voltage (D0, D1) to DGND . . –0.3 V to AVDD + 0.3 V

Operating Temperature Range

Industrial (B Version) . . . . . . . . . . . . . . . . –40°C to +85°C

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

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

Plastic DIP Package, Power Dissipation . . . . . . . . . . 450 mW

θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 105°C/W

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

TSSOP Package, Power Dissipation . . . . . . . . . . . . . 450 mW

θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 128°C/W

Lead Temperature, Soldering

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

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

SOIC Package, Power Dissipation . . . . . . . . . . . . . . . 450 mW

θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 75°C/W

Lead Temperature, Soldering

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

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

*Stresses 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.

Model

AD7731BN

AD7731BR

AD7731BRU

EVAL-AD7731EB

ORDERING GUIDE

Temperature Range

–40°C to +85°C

–40°C to +85°C

–40°C to +85°C

Evaluation Board

Package Description

Plastic DIP

Small Outline

Thin Shrink Small Outline (TSSOP)

Package Options

N-24

R-24

RU-24

TO OUTPUT

PIN

50pF

ISINK (800µA AT DVDD = +5V

100µA AT DVDD = +3V)

+1.6V

ISOURCE (200µA AT DVDD = +5V

100µA AT DVDD = +3V)

Figure 1. Load Circuit for Access Time and Bus Relinquish Time

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 AD7731 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.

WARNING!

ESD SENSITIVE DEVICE

REV. 0

–5–

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