AD7402

Data Sheet

Rev. A | Page 8 of 20

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

Figure 4. Pin Configuration

Table 9. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

VDD1

Supply Voltage, 4.5 V to 5.5 V. This is the supply voltage for the isolated side of the AD7402 and is relative to GND1.

2

VIN+

Positive Analog Input.

3

VIN−

Negative Analog Input. Normally connected to GND1.

4

GND1

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

5

GND2

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

6

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 MCLKOUT input and are valid on the following MCLKOUT falling edge.

7

MCLKOUT

Master Clock Logic Output, 10 MHz (Typical). The bit stream from the modulator is valid on the falling edge of

MCLKOUT.

8

VDD2

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

VDD1

VDD2

MCLKOUT

MDAT

GND2

VIN+

VIN–

GND1

1

2

3

4

8

7

6

5

AD7402-8

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