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LMP91200 - Configurable AFE

Datasheet Summary

Description

The LMP91200 device is a sensor AFE for use in low-power, analytical-sensing applications.

The LMP91200 is designed for 2-electrode sensors.

This device provides all of the functionality needed to detect changes based on a delta voltage at the sensor.

Features

  • 1 Active Guarding.
  • Key Specifications Unless otherwise noted, typical values at TA = 25°C, VS = (VDD-GND) = 3.3 V.
  • pH Buffer Input Bias Current (0 < VINP < 3.3 V).
  • Maximum at 25°C: ±125 fA.
  • Maximum at 85°C: ±445 fA.
  • pH Buffer Input Bias Current (.
  • 500 mV < VINP.
  • VCM < 500 mV), VS = (VDD.
  • GND) = 0 V.
  • Maximum at 25°C: ±600 fA.
  • Maximum at 85°C: ±6.5 pA.
  • pH Buffer Input Offset Voltage: ±200 µV.

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Datasheet preview – LMP91200

Datasheet Details

Part number LMP91200
Manufacturer Texas Instruments
File Size 671.00 KB
Description Configurable AFE
Datasheet download datasheet LMP91200 Datasheet
Additional preview pages of the LMP91200 datasheet.

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Full PDF Text Transcription

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LMP91200 SNAS571E – JANUARY 2012 – REVISED FEBRUARY 2016 LMP91200 Configurable AFE for Low-Power Chemical-Sensing Applications 1 Features •1 Active Guarding • Key Specifications Unless otherwise noted, typical values at TA = 25°C, VS = (VDD-GND) = 3.3 V – pH Buffer Input Bias Current (0 < VINP < 3.3 V) – Maximum at 25°C: ±125 fA – Maximum at 85°C: ±445 fA – pH Buffer Input Bias Current (–500 mV < VINP– VCM < 500 mV), VS = (VDD – GND) = 0 V – Maximum at 25°C: ±600 fA – Maximum at 85°C: ±6.5 pA – pH Buffer Input Offset Voltage: ±200 µV – pH Buffer Input Offset Voltage Drift: ±2.5 μV/°C – Supply Current: 50 μA – Supply Voltage: 1.8 V to 5.
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