ADC3544 datasheet(3/86 Pages) TI

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5 Pin Configuration and Functions

Figure 5-1. RSB Package, 40-Pin WQFN

(Top View)

Table 5-1. Pin Descriptions

I/O

DESCRIPTION

NAME

NO.

INPUT/REFERENCE

AINM

Negative analog input

AINP

Positive analog input

REFBUF

1.2-V external voltage reference input for use with internal reference buffer. Internal 100 kΩ

pull-up resistor to AVDD. This pin is also used to configure default operating conditions.

REFGND

Reference ground input, 0 V

VCM

Common-mode voltage output for the analog inputs, 0.95 V

VREF

External voltage reference input, 1.6 V.

CLOCK

CLKM

Negative differential sampling clock input for the ADC

CLKP

Positive differential sampling clock input for the ADC

CONFIGURATION

PDN/SYNC

Power down, synchronization input. This pin can be configured via the SPI interface. Active

high. This pin has an internal 21 kΩ pull-down resistor.

RESET

Hardware reset; active high. This pin has an internal 21 kΩ pull-down resistor.

SCLK

Serial interface clock input. This pin has an internal 21 kΩ pull-down resistor.

SDIO

Serial interface data input and output. This pin has an internal 21 kΩ pull-down resistor.

SEN

Serial interface enable. Active low. This pin has an internal 21 kΩ pull-up resistor to AVDD.

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ADC3541, ADC3542

SBAS840B – JULY 2020 – REVISED APRIL 2022

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