User’s Guide
October 2012
LMP91051EVM User’s Guide
October 2012
LMP91051EVM User’s Guide
CONTENTS
1
INTRODUCTION ................................................................................................... 1
2
SETUP .................................................................................................................. 2
3
OPERATION ......................................................................................................... 5
4
INSTALLING THE SENSOR AFE SOFTWARE ................................................... 10
5
BOARD LAYOUT ................................................................................................ 11
6
SCHEMATIC ....................................................................................................... 12
7
BOM .................................................................................................................... 13
LIST OF FIGURES
1 Connection Diagram ............................................................................................... 2
2 Jumper Setting (Default) for voltage reading ........................................................... 3
3 LMP91051EVM to SPIO-4 Board Connection ......................................................... 4
4 Sensor AFE Items of Interest .................................................................................. 5
5 Recommended LMP91051 Configuration for a voltage Reading ............................. 7
6 Sensor Database Window ..................................................................................... 8
7 Reults of DC Reading ............................................................................................. 9
8 LMP91051EVM’s J3 for SPI Signals ..................................................................... 10
9 LMP91051EVM Layout ......................................................................................... 11
8 LMP91051EVM Schematic ................................................................................... 12
LIST OF TABLES
1 Jumpers for Voltage Measurement ......................................................................... 3
2 LMP91051EVM Bill of Materials............................................................................ 13
1.
Introduction
The LMP91051 Design Kit (consisting of the LMP91051 Evaluation Module, the SPIO-4 Digital Controller
Board, the Sensor AFE software, and this user’s guide) is designed to ease evaluation and design-in of Texas
Instrument’s LMP91051 Configurable AFE for Nondispersive Infrared (NDIR).
Data capturing and evaluations are simplified by connecting the SPIO-4 Digital Controller Board (SPIO-4 board)
to a PC via USB and running the Sensor AFE software. The data capture board will generate the SPI signals
to communicate to and capture data from the LMP91051. The user will also have the option to evaluate the
LMP91051 without using the SPIO-4 board or the Sensor AFE software.
The on board data converter will digitize the LMP91051’s analog output, and the software will display these
results in time domain and histogram. The software also allows customers to write to and read from registers,
to configure the device’s gain, output offset, and common mode voltage, and most importantly, to configure and
learn about the LMP91051.
