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Details for LMP91000SDE by Texas Instruments
Semiconductors - ICs > Special Function >
AFE SENSOR 14LLP
LMP91000SDE image

LMP91000SDE by Texas Instruments

AFE SENSOR 14LLP
Features
Ambient Operating Temperature u201340u00b0C to 85u00b0C
Cell Conditioning Current Up to 10 mA
Complete Potentiostat Circuit-to-Interface to Most Chemical Cells
I2 C Compatible Digital Interface
Low-Bias Voltage Drift
Output Drive Current 750 u00b5A
Package 14-Pin WSON
Programmable Cell Bias Voltage
Programmable TIA gain 2.75 ku2126 to 350 ku2126
Reference Electrode Bias Current (85u00b0C) 900pA (max)
Sink and Source Capability
Supply Current (Average Over Time) <10 u00b5A
Supply Voltage 2.7 V to 5.25 V
Supported by WEBENCHu00ae
Typical Values, TA = 25u00b0C
Part Information
LMP91000SDE image
RoHS Compliant
Description
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