LMP91000SDE

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Series Information for LMP91000SDE - Texas Instruments

Features

  • feature
    Ambient Operating Temperature u201340u00b0C to 85u00b0C
  • feature
    Cell Conditioning Current Up to 10 mA
  • feature
    Complete Potentiostat Circuit-to-Interface to Most Chemical Cells
  • feature
    I2 C Compatible Digital Interface
  • feature
    Low-Bias Voltage Drift
  • feature
    Output Drive Current 750 u00b5A
  • feature
    Package 14-Pin WSON
  • feature
    Programmable Cell Bias Voltage
  • feature
    Programmable TIA gain 2.75 ku2126 to 350 ku2126
  • feature
    Reference Electrode Bias Current (85u00b0C) 900pA (max)
  • feature
    Sink and Source Capability
  • feature
    Supply Current (Average Over Time) <10 u00b5A
  • feature
    Supply Voltage 2.7 V to 5.25 V
  • feature
    Supported by WEBENCHu00ae
  • feature
    Typical Values, TA = 25u00b0C

Description

AFE SENSOR 14LLP
The LMP91000 is a programmable analog front-end (AFE) for use in micro-power electrochemical sensing applications. It provides a complete signal path solution between a sensor and a microcontroller that generates an output voltage proportional to the cell current. The LMP91000’s programmability enables it to support multiple electrochemical sensors such as 3-lead toxic gas sensors and 2-lead galvanic cell sensors with a single design as opposed to the multiple discrete solutions. The LMP91000 supports gas sensitivities over a range of 0.5 nA/ppm to 9500 nA/ppm. It also allows for an easy conversion of current ranges from 5 µA to 750 µA full scale. The LMP91000’s adjustable cell bias and transimpedance amplifier (TIA) gain are programmable through the I2C interface. The I2C interface can also be used for sensor diagnostics. An integrated temperature sensor can be read by the user through the VOUT pin and used to provide additional signal correction in the µC or monitored to verify temperature conditions at the sensor. The LMP91000 is optimized for micro-power applications and operates over a voltage range of 2.7 to 5.25 V. The total current consumption can be less than 10 μA. Further power savings are possible by switching off the TIA amplifier and shorting the reference electrode to the working electrode with an internal switch.

Specifications

IC Function:
Programmable Analogue Front End (AFE)
Supply Voltage Min:
2.7V
Supply Voltage Max:
5.25V
IC Package Type:
LLP
No. of Pins:
14Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
-
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
MSL 3 - 168 hours
SVHC:
No SVHC (27-Jun-2018)
Base Number:
91000
Brief Features:
Programmable Cell Bias Voltage Low Bias Voltage Drift I2C Compatible Digital Interface
Operating Temperature Range:
-40°C to +85°C
Output Current Max:
750µA
Supply Voltage Range:
2.7V to 5.25V