Texas Instruments LMP91000EVM Manuals

User’s Guide SNAU121- June 2012 LMP91000EVM User’s Guide SNAU121-April 2012 LMP91000EVM User’s Guide 1 CONTENTS 1 INTRODUCTION ....................................................................................................... 1 2 SETUP ....................................................................................................................... 1 3 BOARD LAYOUT ..................................................................................................... 5 4 SCHEMATIC ............................................................................................................. 7 LIST OF FIGURES Figure 1: Gas sensor’s footprint .......................................................................................... 2 Figure 2: 2-WIRE Jumper Settings ..................................................................................... 2 Figure 3: J_MENB Jumper Settings ................................................................................... 3 Figure 4: Connection of the LMP91000EVM to SPIO4 board ............................................ 3 Figure 5: Top Layer Routing ............................................................................................... 5 Figure 6: Bottom Layer Routing .......................................................................................... 6 Figure 7: LMP91000EVM Schematic .................................................................................. 7 LIST OF TABLES Table 1: Device and Package Configurations .................................................................... 1 Table 2: Recommended p-FETs for short circuiting RE and WE when LMP91000 is OFF 2 Table 2: LMP91000EVM Bill of Materials ........................................................................... 8 1. Introduction The Texas Instruments LMP91000EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LMP91000 Sensor Analog Front End for Electrochemical sensor. The LMP91000EVM is part of the Sensor AFE eval platform The EVM contains one LMP91000, (See Table 1). Table 1: Device and Package Configurations DEVICE IC PACKAGE U1 LMP91000SD LLP-14 The LMP91000EVM is provided with a 16 bit ADC (ADC161S626) in order to capture the output of the LMP91000. The LMP91000EVM is not provided with any gas sensor. It supports 3-lead electrochemical cells and 2-lead galvanic cell in potentiostat configuration. 2. Setup This section describes the jumpers and connectors on the EVM as well and how to properly connect, set up and use the LMP91000EVM in the Sensor AFE eval platform.