ADA4255ACPZ-R7 datasheet(10/64 Pages) AD

10 / 64 page

Data Sheet

ADA4255

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

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Rev. 0 | 10 of 64

Figure 5. Pin Configuration

Table 5. Pin Function Descriptions

Pin No.

Mnemonic

Pin Description

+IN1

Channel 1 Positive Input.

−IN1

Channel 1 Negative Input.

+IN2

Channel 2 Positive Input.

−IN2

Channel 2 Negative Input.

5, 28

DNC

Do Not Connect. Do not connect to this pin.

DVSS

Negative Digital Supply Voltage.

DVDD

Positive Digital Supply Voltage.

SDO

SPI Serial Data Output.

SDI

SPI Serial Data Input.

SCLK

SPI Serial Clock Input.

SPI Chip Select Input.

GPIO6

GPIO6/SCS6.

GPIO5

GPIO5/SCS5.

GPIO4

GPIO4/SCS4/Clock Input or Output.

GPIO3

GPIO3/SCS3/Fault Interrupt Output.

GPIO2

GPIO2/SCS2/Calibration Busy Out.

GPIO1

GPIO1/SCS1/External Multiplexer Control 1.

GPIO0

GPIO0/SCS0/External Multiplexer Control 0.

+OUT

Positive Output.

−OUT

Negative Output.

VOCM

Output Amplifier Common-Mode Voltage Input. The VOCM pin is high impedance and is not internally biased.

AVSS

Output Amplifier Negative Supply Voltage.

AVDD

Output Amplifier Positive Supply Voltage.

IOUT

Excitation Current Source Output.

VDDCP

Charge Pump Supply Voltage.

VDDH

Positive High Voltage Charge Pump Output. VDDH handles 500 μA load.

VSSH

Negative High Voltage Charge Pump Output. VSSH handles 500 μA load.

EPAD

Exposed Pad. Connect the exposed pad (EPAD) to VSSH.

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