Sensor AFE

NEW! LMP91050 – Configurable AFE for NDIR Sensing Applications




Thermopile Sensors as typically used in NDIR applications

The LMP91050 is a programmable integrated Sensor Analog Front End (AFE) optimized for thermopile sensors, as typically used in NDIR applications. It provides a complete signal path solution between a sensor and microcontroller that generates an output voltage proportional to the thermopile voltage. The LMP91050's programmability enables it to support multiple thermopile sensors with a single design as opposed to the multiple discrete solutions.

  • Programmable gain amplifier
  • “Dark Signal” offset cancellation
  • Supports external filtering
  • Common mode generator and 8 bit DAC
  • Ideal for NDIR Sensing, Demand control ventilation, Automotive CO2 cabin control, Alcohol detection

LMP91050 Configurable AFE for NDIR Sensing Applications

 

NEW! LMP91200 – Configurable AFE for Low-Power Chemical Sensing Applications



pH Sensors

The LMP91200 is a configurable 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. Optimized for low-power applications, the LMP91200 works over a voltage range of 1.8V to 5.5V. With its extremely low input bias current it is optimized for use with pH sensors.

  • Programmable output current in temperature measurement
  • Programmable Output common mode voltage
  • Active guarding
  • On board sensor test
  • Ideal for pH sensor platforms
LMP91200 Configurable AFE for Low-Power Chemical Sensing Applications

 

LMP91000 - Micro-Power Chemical & Gas Sensor AFE



Chemical & Gas Sensors

The LMP91000 low-power gas and chemical Sensor AFE provides adjustable bias (sensor drive), sensitivity, and wide dynamic range in an integrated solution for multiple sensing applications. For example, a toxic gas sensing application that today may require several boards and up to 25 components is reduced to just one LMP91000 gas sensor AFE.

  • Single analog design for multiple gases and gas concentrations
  • Programmable cell bias and TIA gain
  • Integrated temperature sensor for external temp monitoring / correction
  • Quick design and evaluation
  • Ideal for micro-power gas and chemical sensing applications
LMP91000 Micro-Power Chemical & Gas Sensor AFE

 

LMP90xxx Family – Multi-Channel 16- & 24-bit Sensor AFEs

Temperature, Pressure, Load, Force, & Other Sensors

The LMP90xxx Sensor AFE family features the industry's only low-power, fully configurable 16- and 24-bit ΣΔ ADCs with true continuous background calibration, eliminating gain and offset drift over time and temperature and making them ideal for critical performance and low power applications.

  • Multi-channel Sensor AFE with a 16- or 24-bit Sigma Delta ADC core
  • Flexible, programmable mux (4 differential, 7 single-ended, or a combination inputs)
  • Continuous background sensor diagnostics reduces downtime and improves system efficiency
  • Quick design and evaluation
  • Ideal for high-precision, multi-sensor temperature, pressure, load, and force applications
  • Industrial, process control, medical, and test & measurement applications
LMP90100 Multi-Channel 24-bit Sensor AFE with True Continuous Background Calibration

LMP90xxx Sensor AFE Portfolio

Resolution Current Sources Inputs
4 Diff / 7 SE 2 Diff / 4 SE
24-bit Yes LMP90100 LMP90098
24-bit No LMP90099 LMP90097
16-bit Yes LMP90080 LMP90078
16-bit No LMP90079 LMP90077





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