ADAS3022 datasheet(11/40 Pages) AD

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Data Sheet

ADAS3022

Rev. A | Page 11 of 40

Pin No.

Mnemonic

Type1

Description

DVDD

Digital 5 V Supply. Decouple this supply using a 10 μF capacitor and a 0.1 μF local capacitor.

AVDD

Analog 5 V Supply. Decouple this supply using a 10 μF capacitor and a 0.1 μF local capacitor.

RCAP

Internal 2.5 V Analog Regulator Output. This regulator supplies power to the internal reference.

Decouple this pin using a 1 μF capacitor connected to RCAP and a 0.1 μF local capacitor.

REFIN

AI/O

Internal 2.5 V Band Gap Reference Output, Reference Buffer Input, or Reference Power-Down Input. See

the Voltage Reference Input/Output section for more information.

33, 34

REF1, REF2

AI/O

Reference Input/Output. Regardless of the reference method, these pins need individual decoupling

using external 10 μF ceramic capacitors connected as close to REF1, REF2, and REFN as possible. See

the Voltage Reference Output/Input section for more information. REF1 and REF2 must be tied

together externally.

RGND

Reference Supply Ground. Connect this pin to the system analog ground plane.

36, 37

REFN

Reference Input/Output Ground. Connect the 10 μF capacitors on REF1 and REF2 to these pins, and

connect these pins to the system analog ground plane.

VSSH

High Voltage Analog Negative Supply. Nominally, the supply of this pin should be −15 V. Decouple this

pin using a 10 μF capacitor and a 0.1 μF local capacitor.

VDDH

High Voltage Analog Positive Supply. Nominally, the supply of this pin should be +15 V. Decouple this

pin using a 10 μF capacitor and a 0.1 μF local capacitor.

AUX−

Auxiliary Input Channel Negative Input.

EPAD

Exposed Paddle. The exposed paddle should be connected to VSSH.

AI = analog input, AI/O = analog input/output, DI = digital input, DO = digital output, and P = power.

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