Jumpers And Switches; Analog Connections - Texas Instruments ADS1271EVM-PDK User Manual

ADS1271EVM Hardware Details
5 ADS1271EVM Hardware Details
The ADS1271EVM is designed to easily interface with multiple control platforms. Dual-row, header/socket
combinations of J1 and J2 allow connection to external circuitry for evaluation and debug.
5.1

Jumpers and Switches

The jumpers and switches functions are shown below in
Jumper/Switch Functions
J1 Analog inputs/external reference (primary)
J2 Digital Interface signals
J3 Power
J4 Analog inputs/external reference (aux)
J5 Analog inputs/external reference (aux)
J6 Power
J7 Format/Mode Selection
S1 Analog input to buffer
S2 Analog input to buffer
S3 U7 Reference selector
S4 U7 Analog Input selector
S5 U8 Reference selector
S6 U8 Analog Input selector
S7 Interface selector
5.2

Analog Connections

5.2.1 Analog Interface, J1, J4, and J5
The ADS1271EVM features several analog input options. Signals can be routed directly to the converters
or can pass through the onboard buffer amplifiers (U5, U6). Signals can be applied to the board through
the standard modular EVM analog connector (J1) or brought in through the auxiliary input connectors (J4,
J5). A set of switches selects which analog connector source is used and whether the buffer amplifiers are
in the signal path. These switches enable several configurations for evaluation. Switch operation and
analog path configuration are described in
For maximum flexibility, the ADS1271EVM is designed for easy interfacing to multiple analog sources.
Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-
row, header/socket combination at J1. This header/socket provides access to the analog input pins of the
ADS1271.
Pin Number
J1.1
J1.2
J1.3
J1.4
J1.5
J1.6
J1.7
8
ADS1271EVM and ADS1271EVM-PDK User's Guide
Table 4. Jumper and Switch Descriptions
Section
Table 5. Analog Interface Pinout (J1)
Signal Description
AIN0N ADS1271 (U7) AINN
AIN0P ADS1271 (U7) AINP
AIN1N ADS1271 (U8) AINN
AIN1P ADS1271 (U8) AINP
Unused
Unused
Unused
Copyright © 2004–2014, Texas Instruments Incorporated
Table 4
Descriptions
Primary analog input/external reference connectors (from
MMB0)
Serial Interface and GPIO signals (from MMB0)
Power supply connections (from MMB0)
Auxiliary analog input/eternal reference connector for U7
Auxiliary analog input/eternal reference connector for U7
Power selection and supply monitoring
Connection of Format and Mode controls to ADCs
Selection of which analog signal header to connect to buffer,
U5
Selection of which analog signal header to connect to buffer,
U6
Select source of reference for U7
Select source of analog input for U7
Select source of reference for U8
Select source of analog input for U8
Select interface type (FORMAT)
5.2.2, Table 6 , and Table
SBAU107C – November 2004 – Revised November 2014
www.ti.com
7.
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