6

Advanced Linear Devices

ALD500AU/ALD500A/ALD500

Integrator capacitor connection.

Negative power supply.

The Auto-zero capacitor connection.

4

BUF

The Integrator resistor buffer connection.

5

AGND

This pin is analog ground.

Negative reference capacitor connection.

Positive reference capacitor connection.

External voltage reference (-) connection.

External voltage reference (+) connection.

10

Negative analog input.

11

Positive analog input.

12

A

Converter phase control MSB Input.

13

B

Converter phase control LSB Input.

14

time the Integrator Zero phase.

15

DGND

Digital ground.

16

Positive power supply.

PIN DESCRIPTION

Pin No.

Symbol

Description

Switch Functions

Input

Reference Input

Auto Zero

Reference

System

Connect

Polarity

Sample

Offset

Conversion

Control

Phase

Logic

Auto Zero

A = 0, B = 1

Open

Open

Closed

Closed

Closed

Open

Input Signal

A = 1, B = 0

Closed

Open

Open

Open

Open

Open

Integration

Reference Voltage

A = 1, B = 1

Open

Closed*

Open

Open

Closed

Open

Deintegration

Integrator

A = 0, B = 0

Open

Open

Open

Closed

Closed

Closed

Output Zero

Table 1. Conversion Phase and Control Logic Internal Analog Switch Functions