AD7401A datasheet(9/20 Pages) AD

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AD7401A

Rev. 0 | Page 9 of 20

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

VDD1 1

VIN+ 2

VIN– 3

NC 4

GND2

VDD2

MCLKIN

NC 5

NC 6

MDAT

VDD1 7

GND1 8

GND2

NC = NO CONNECT

AD7401A

TOP VIEW

(Not to Scale)

Figure 5. Pin Configuration

Table 8. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 7

VDD1

Supply Voltage, 4.5 V to 5.5 V. This is the supply voltage for the isolated side of the AD7401A and is relative to GND1.

VIN+

Positive Analog Input. Specified range of ±250 mV.

VIN−

Negative Analog Input. Normally connected to GND1.

4 to 6, 10,

12, 15

No Connect.

GND1

Ground 1. This is the ground reference point for all circuitry on the isolated side.

9, 16

GND2

Ground 2. This is the ground reference point for all circuitry on the nonisolated side.

MDAT

Serial Data Output. The single bit modulator output is supplied to this pin as a serial data stream.

The bits are clocked out on the rising edge of the MCLKIN input and valid on the following MCLKIN rising edge.

MCLKIN

Master Clock Logic Input. 20 MHz maximum. The bit stream from the modulator is valid on the rising edge of MCLKIN.

VDD2

Supply Voltage. 3 V to 5.5 V. This is the supply voltage for the nonisolated side and is relative to GND2.

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