AV775C datasheet(4/12 Pages) AD

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AD775

REV. 0

–4–

WARNING!

ESD SENSITIVE DEVICE

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 AD775 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.

PIN DESCRIPTION

Pin No.

Symbol

Type Name and Function

= Low

= High

Normal Operating Mode.

High Impedance Outputs.

2, 24

DVSS

Digital Ground. Note: DVSS and AVSS pins should share a common ground plane on the circuit board.

D0 (LSB)

Least Significant Bit, Data Bit 0.

4–9

D1–D6

Data Bits 1 Through 6.

D7 (MSB)

Most Significant Bit, Data Bit 7.

11, 13

DVDD

+5 V Digital Supply. Note: DVDD and AVDD pins should share a common supply on the circuit board.

CLK

Clock Input.

VRTS

Reference Top Bias. Short to VRT for Self-Bias.

VRT

Reference Ladder Top.

VRB

Reference Ladder Bottom.

VRBS

Reference Bottom Bias. Short to VRB for Self-Bias.

14, 15, 18 AVDD

+5 V Analog Supply. Note: DVDD and AVDD pins should share a common supply within 0.5 inches

of the AD775.

VIN

Analog Input. Input Span = VRT–VRB.

20, 21

AVSS

Analog Ground. Note: DVSS and AVSS pins should share a common ground within 0.5 inches of the

AD775.

NOTE

Type: AI = Analog Input; DI = Digital Input; DO = Digital Output; P = Power.

PIN CONFIGURATION

(DIP and SOIC)

MAXIMUM RATINGS*

Supply Voltage (AVDD, DVDD) . . . . . . . . . . . . . . . . . . . . 7 V

Supply Difference (AVDD–DVDD) . . . . . . . . . . . . . . . . . . 0 V

Ground Difference (AVSS–DVSS) . . . . . . . . . . . . . . . . . . . 0 V

Reference Voltage (VRT, VRB) . . . . . . . . . . . . . . . . VDD to VSS

Analog Input Voltage (VIN) . . . . . . . . . . . . . . . . . . VDD to VSS

Digital Input Voltage (CLK) . . . . . . . . . . . . . . . . . VDD to VSS

Digital Output Voltage (VOH, VOL) . . . . . . . . . . . . VDD to VSS

Storage Temperature . . . . . . . . . . . . . . . . . . –55

°C to +150°C

*Stresses above those listed under “Absolute Maximum Ratings” may cause

permanent damage to the device. This is a stress rating only and functional

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

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

maximum rating conditions for extended periods may affect device reliability.

ORDERING GUIDE

Temperature

Package

Model

Range

Description

Option

AD775JN –20

°C to +75°C 24-Pin 400 Mil Plastic DIP N-24B

AD775JR –20

°C to +75°C 24-Pin 300 Mil SOIC

R-24A

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