Product details

Resolution (Bits) 24 Number of input channels 7 Sample rate (Max) (kSPS) 0.215 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext Input range (Max) (V) 5.5 Input range (Min) (V) 0 Features Excitation Current Sources (iDACs), PGA Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 1.2 Analog voltage AVDD (Min) (V) 2.85 Analog voltage AVDD (Max) (V) 5.5 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.5
Resolution (Bits) 24 Number of input channels 7 Sample rate (Max) (kSPS) 0.215 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext Input range (Max) (V) 5.5 Input range (Min) (V) 0 Features Excitation Current Sources (iDACs), PGA Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 1.2 Analog voltage AVDD (Min) (V) 2.85 Analog voltage AVDD (Max) (V) 5.5 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.5
HTSSOP (PWP) 28 43 mm² 9.7 x 4.4
  • 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 to 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 (LMP90100/LMP90098)
  • 4-DIFF / 7-SE Inputs (LMP90100/LMP90099)
  • 2-DIFF / 4-SE Inputs (LMP90098/LMP90097)
  • 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 WEBENCHR Sensor AFE Designer
  • Automatic Channel Sequencer
  • Key Specifications
    • ENOB/NFR Up to 21.5/19 Bits
    • Offset Error (Typical) 8.4 nV
    • Gain Error (Typical) 7 ppm
    • Total Noise < 10 µV-rms
    • Integral Nonlinearity (INL Maximum) ± 15 ppm
      of FSR
    • Output Data Rates (ODR) 1.6775 - 214.65
      SPS
    • Analog Voltage, VA 2.85 to 5.5 V
    • Operating Temp Range –4°C to 125°C
    • 28-Pin HTSSOP Exposed Pad
  • 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 to 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 (LMP90100/LMP90098)
  • 4-DIFF / 7-SE Inputs (LMP90100/LMP90099)
  • 2-DIFF / 4-SE Inputs (LMP90098/LMP90097)
  • 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 WEBENCHR Sensor AFE Designer
  • Automatic Channel Sequencer
  • Key Specifications
    • ENOB/NFR Up to 21.5/19 Bits
    • Offset Error (Typical) 8.4 nV
    • Gain Error (Typical) 7 ppm
    • Total Noise < 10 µV-rms
    • Integral Nonlinearity (INL Maximum) ± 15 ppm
      of FSR
    • Output Data Rates (ODR) 1.6775 - 214.65
      SPS
    • Analog Voltage, VA 2.85 to 5.5 V
    • Operating Temp Range –4°C to 125°C
    • 28-Pin HTSSOP Exposed Pad

The LMP90xxx is a highly integrated, multichannel, 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 LMP90100/LMP90099/LMP90098/LMP90097 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 LMP90100/LMP90098 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.

Collectively, these features make the LMP90100/LMP90099/LMP90098/LMP90097 complete analog front-ends for low-power, precision sensor applications such as temperature, pressure, strain gauge, and industrial process control. The LMP90100/LMP90099/LMP90098/LMP90097 are ensured over the extended temperature range of –40°C to +125°C and are available in a 28-pin HTSSOP package with an exposed pad.

The LMP90xxx is a highly integrated, multichannel, 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 LMP90100/LMP90099/LMP90098/LMP90097 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 LMP90100/LMP90098 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.

Collectively, these features make the LMP90100/LMP90099/LMP90098/LMP90097 complete analog front-ends for low-power, precision sensor applications such as temperature, pressure, strain gauge, and industrial process control. The LMP90100/LMP90099/LMP90098/LMP90097 are ensured over the extended temperature range of –40°C to +125°C and are available in a 28-pin HTSSOP package with an exposed pad.

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Design & development

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Evaluation board

LMP90100EB — LMP90100 Sensor AFE Evaluation Board

Already own the LMP90100EB and SPIO-4 boards?
Download the
LMP90100 Evaluation Platform Software
(version 2.0.1, zip)

The LMP90100EB is the evaluation board 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. (...)

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Support software

LMP90100 Sensor AFE Software Download

SNAC006.ZIP (28317 KB)
Support software

MSP430 Interface to LMP90100 Code Library

SNAC029.ZIP (115 KB)
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and (...)
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Package Pins Download
HTSSOP (PWP) 28 View options

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