AD2437

Rev. 0

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Page 35 of 42

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July 2023

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

Package pin information is shown in Figure 41. The pin func-

tion descriptions are shown in Table 20.

All digital inputs and digital outputs are three-stated with inputs

disabled during reset.

Figure 41. Package Pin Configuration

Table 20. AD2437 Pin Function Descriptions

Pin No.

Pin Name

Type

Alternate

Functions1

Description

1

PLLVSS

PWR

None

Power supply pin for PLLVDD return currents. This pin must be connected

to a low impedance local ground plane.

2, 3

DVDD

PWR

None

Power supply pin for digital core logic. This pin must be connected to

VOUT1.

4

DVSS

PWR

None

Power supply pin for DVDD return currents. This pin must be connected to

a low impedance local ground plane.

5SIO0

2, 3

D_IO

PDM0

GPIO0

Serial I/O pin 0. This pin is a I

2S/TDM receive data pin (DRX0). When PDM

functions are enabled, this pin is a microphone input pin (PDM0). When not

used for serial input, this pin can be configured as a general-purpose I/O pin

(GPIO0).

6SIO1

2, 3

D_IO

PDM1

GPIO1

Serial I/O pin 1. This pin is a configurable I

2S/TDM data pin (DRX1 or

DTX3).When PDM functions are enabled, this pin is a microphone input pin

(PDM1). When not used for serial I/O, this pin can be configured as a general-

purpose I/O pin (GPIO1).

7SIO22, 3

D_IO

ASPISS

SPISSEL1

GPIO2

Serial I/O pin 2. This pin is a configurable I2S/TDM data pin (DRX2 or DTX2).

When not used for serial I/O, this pin can be configured as the alternate SPI

slave-select input pin (ASPISS) or as an SPI slave-select output pin (SPISSEL1).

When not used for I

2S/TDM or SPI purposes, this pin can be configured as a

general-purpose I/O pin (GPIO2).

In this table, the type is defined as follows: PWR = power/ground, A_IN = analog input, D_IN = digital input, A_OUT = analog output,



D_OUT = digital output, A_IO = analog input/output, D_IO = digital input/output, D_IO_OD = digital input/open-drain output,



N/A = not applicable.

1

2

3

ISENSEN

BCM

BN

4

BP

5

TRXVSS

6

TRXVDD

7

TRXVSS

TOP VIEW

25

SIO3

26

IOVDD

27

IOVSS

28

BCLK

29

SYNC

30

SIO2

31

SIO1

32

SIO0

33

DVSS

34

DVDD

35

DVDD

36

PLLVSS

8

AP

9

AN

10

ACM

11

VSS

12

RST

EPAD

(PIN 49)