Texas Instruments: LMP90100EB/NOPB Evaluation Board for the LMP90100 Sensor AFE

atomar — Wed, 25 Jun 2014 00:53:06 GMT

Current Revision posted to Documents by atomar on 6/25/2014 12:53:06 AM

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Kit Overview

The LMP90100EB/NOPBLMP90100EB/NOPB is the evaluation board (LMP90100EB/NOPBLMP90100EB/NOPB) for the LMP90XXX family. In order to interface this board to a PC, a SPIO-4 digital controller board (order both boards separately) is required. The SPIO-4 board captures the SPI signals and displays the timing and histogram plots in the multiProductLinkLMP90100 Evaluation Platform software.

The LMP90100LMP90100 Design Kit (LMP90100EB/NOPBLMP90100EB/NOPB) is designed to ease evaluation and design-in of National Semiconductor’s multiProductLinkLMP90100 24-bit Fully Programmable Low Power ΣΔ ADC with True Continuous Background Calibration.

Data capturing and static evaluations are simplified by connecting the SPIO-4/NOPBSPIO-4/NOPB 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 LMP90100LMP90100. The user will also have the option to evaluate the multiProductLinkLMP90100 without using the SPIO-4 board or the Sensor AFE software. The LMP90100 will digitize the analog input, 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 calibrate the device or the system’s gain, offset, and scale settings, and most importantly, to configure and learn about the LMP90100LMP90100

The LMP90100LMP90100 are highly integrated, multi-channel, low power 24-bit Sensor AFEs. The devices features a precision, 24-bit Sigma Delta Analog-to-Digital Converter (ADC) with a low-noise programmable gain amplifier and a fully differential high impedance analog input multiplexer. A true continuous background calibration feature allows calibration at all gains and output data rates without interrupting the signal path.

The background calibration feature essentially eliminates gain and offset errors across temperature and time, providing measurement accuracy without sacrificing speed and power consumption. Another feature of the LMP90100LMP90100 is continuous background sensor diagnostics, allowing the detection of open and short circuit conditions and out-of-range signals, without requiring user intervention, resulting in enhanced system reliability.

Two sets of independent external reference voltage pins allow multiple ratiometric measurements. In addition, two matched programmable current sources are available in the LMP90100LMP90100/LMP90098LMP90098 to excite external sensors such as resistive temperature detectors and bridge sensors. Furthermore, seven GPIO pins are provided for interfacing to external LEDs and switches to simplify control across an isolation barrier.

Key Applications: Temperature and Pressure Transmitters, Strain Gauge Interface, Industrial Process Control

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Technical Documents

Learning Center

Type	Description
User Guide	TI: User Guide for LMP90100 Evaluation Board with Sensor AFE Software
Datasheet	TI: Data Sheet for LMP90100 Multi-Channel, Low Power 24-Bit Sensor AFE with True Continuous Background Calibration
Solution Guide	TI: Solution Guide for Precision Data Converters
Application Note	TI: AN-2265 - Application Note for LMP90100 / LMP90098(24-bit) and LMP90080 / LMP90078(16-bit) 4 Wire RTD Interface
Application Note	TI: AN-2217 - Application Note for MSP430 Interface to LMP90100 Code Library
Application Note	TI: AN-2180 - Application Note for LMP90100 True Continuous Background Calibration
Application Note	TI: Application Note for Microcontroller Firmware Considerations for the National LMP90100 Sensor vAFE
Application Note	TI: Application Note for A Unique Approach to Developing Sensor Signal Path Solutions

Design Elements

Type	Description
Application Library	TI: Software for LMP90100 Sensor AFE
CAD Model	TI: CAD Model for LMP90100 (BXL File Format)

Video

Video1	Video2
www.youtube.com/watch	www.youtube.com/watch

Kit Features

Key Features for LMP90100LMP90100 Features:

24-Bit Low Power Sigma Delta ADC
True Continuous Background Calibration at all gains
In-Place System Calibration using Expected Value programming
Low-Noise programmable gain (1x - 128x)
Continuous background open/short and out of range sensor diagnostics
8 output data rates (ODR) with single-cycle settling
2 matched excitation current sources from 100 µA to 1000 µA (LMP90100LMP90100/LMP90098LMP90098)
4-DIFF / 7-SE inputs (LMP90100/LMP90099LMP90099)
2-DIFF / 4-SE inputs (LMP90098/LMP90097LMP90097)
7 General Purpose Input/Output pins
Chopper-stabilized buffer for low offset
SPI 4/3-wire with CRC data link error detection
50 Hz to 60 Hz line rejection at ODR ≤13.42 SPS
Independent gain and ODR selection per channel
Supported by Webench Sensor AFE Designer
Automatic Channel Sequencer

Kit Contents

The Texas Instrument's LMP90100EB/NOPBLMP90100EB/NOPB Supplied with below contents:

LMP90100EB/NOPBLMP90100EB/NOPB Sensor AFE Evaluation Board

Tags: lmp90100eb, lmp90100, lmp90100eb/nopb, lmp90xxx, texas_instruments, evaluation_board