Texas Instruments LMP91000EVM Скачать руководство пользователя страница 7 | Manualshive

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SNAU121-April 2012

LMP91000

EVM User’s Guide

7

4.

Schematic

Figure 7: LMP91000EVM Schematic

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Содержание LMP91000EVM

Страница 1: ... 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...

Страница 2: ...below The gate resistance R12 can be populated with a 1kohm resistor Table 2 Recommended p FETs for short circuiting RE and WE when LMP91000 is OFF DEVICE IC DESCRIPTION MANUFACTURER PACKAGE Q1 PMBFJ177 P channel Silicon Junction Field effect Transistor NXP SEMICONDUCTOR SOT23 SST177 VISHAY SILICONIX MMBF177 Fairchild 2 2 Jumpers Configuration 2 WIRE is the jumper which shorts CE and RE pin when a...

Страница 3: ... AFE eval platform make sure the following steps have been accomplished 1 Install the Graphical User Interface of the LMP91000EVM 2 Connect the LMP91000EVM to the SPIO4 board 3 Connect the USB cable to SPIO 4 board 4 Connect the other end of the USB cable to an available USB port on the computer 5 Run the Graphical User Interface The voltage at VDD pin of the LMP91000 VDD test point is 3 3V the vo...

Страница 4: ...s The I2C bus requires two 10kohm pull up resistors R1 R2 the external microcontroller can be connected to the SPIO GPSI16 connector according to the following pin out SCL pin 12 of SPIO GPSI16 SDA pin 11 of SPIO GPSI16 GND pin 2 of SPIO GPSI16 Refer to LMP91000 s datasheet for further details on I2C commands and registers The footprints of the pull up resistors R1 R2 are on the bottom side of the...

Страница 5: ...Board Layout Figure 5 Figure 6 and Figure 7 show the board layout for the LMP91000EVM The EVM offers footprint for External JFET Q1 to short RE and WE pin Resistor R3 and capacitor C2 to apply external RTIA gain and filter Figure 5 Top Layer Routing ...

Страница 6: ...Bill of Materials 6 LMP91000EVM User s Guide SNAU121 April 2012 Figure 6 Bottom Layer Routing ...

Страница 7: ...SNAU121 April 2012 LMP91000EVM User s Guide 7 4 Schematic Figure 7 LMP91000EVM Schematic ...

Страница 8: ...ishay Sprague 593D106X9016C2 TE3 4 GND1 GND2 GND3 GND4 Test Point TH Miniature Black 40 mil Keystone Electronics 5001 3 GAS_SENSOR Gas sensor Hood 100mil Cambion 450 3326 01 03 00 4 H1 H2 H3 H4 BUMPON HEMISPHERE 44X 20 BLACK 3M SJ 5003 BLACK 1 J_MENB Header TH 100mil 1x3 Gold plated 230 mil above insulator 0 100 x 3 Samtec Inc TSW 103 07 G S 2 R4 R8 RES 20 0 ohm 1 0 1W 603 Yageo America RC0603FR 0...

Страница 9: ...SNAU121 April 2012 LMP91000EVM User s Guide 9 ...

Страница 10: ...vices described herein Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2012 Texas Instruments Incorporated REGULATORY COMPLIANCE INFORMATION As noted in the EVM User s Guide and or EVM itself this EVM and or accompanying hardware may or may not be subject to the Federal Communications Commission FCC and Industry Canada IC rules For EVMs not subject to the abov...

Страница 11: ...ergy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correc...

Страница 12: ...nnée équivalente p i r e ne dépasse pas l intensité nécessaire à l établissement d une communication satisfaisante Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d antenne énumérés dans le manuel d usage et ayant un gain admissible maximal et l impédance requise pour chaque type d antenne Les types d antenne non inclus dans cette liste ou dont le gain...

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