BOOSTXL-ADS7142-Q1 EVM Overview
4
SBAU321A – November 2018 – Revised August 2019
Copyright © 2018–2019, Texas Instruments Incorporated
BOOSTXL-ADS7142-Q1 BoosterPack™ Plug-In Module
2.2
Digital Interface
As noted in
, the BOOSTXL-ADS7142-Q1 interfaces with the MSP-EXP432E401Y LaunchPad™,
which in turn communicates with the computer over USB. The two devices on the booster pack that the
MSP432E401Y communicates over I
2
C are the ADS7142-Q1 ADC and the EEPROM. The EEPROM
comes preprogrammed with the information required to configure and initialize the BOOSTXL-ADS7142-
Q1 platform. Once the hardware is initialized, the EEPROM is no longer used.
2.3
ADS7142-Q1 Digital I/O Interface
The BOOSTXL-ADS7142-Q1 supports the I
2
C digital interface and functional modes as detailed in the
. The MSP432E401Y LaunchPad™ is capable of operating at a 3.3-V logic level
and is directly connected to the digital I/O lines of the ADC.
2.4
Power Supplies
The device supports a wide range of operation on its analog supplies. The AVDD can operate from 1.65 V
to 3.6 V. The DVDD operates from 1.65 V to 3.6 V, independent of the AVDD supply. The 3.3-V voltage
regulator available on the MSP-EXP432E401Y is used to supply 3.3 V to both AVDD and DVDD on the
BOOSTXL-ADS7142-Q1.
There is an onboard option to use an ultra-low power voltage reference REF3133-Q1 (U2) to generate
3.3-V supply for the ADS7142-Q1 AVDD pin. Voltage variants of REF3330 can be used to generate
supply other than 3.3-V for the ADS7142-Q1 AVDD pin. To generate a DVDD supply other than 3.3 V, an
adjustable version of the TPS799-Q1 regulator (U3) can be used.
