Inductive Proximity Sensor AFE

Inductive Proximity Sensor AFE - LMP91300


The LMP91300 is a complete analog front end (AFE) optimized for use in industrial inductive proximity sensors. The LMP91300 directly converts the RP of the external LC tank into a digital value.

Post-manufacturing configuration and calibration is fully supported. The temperature dependence of the sensor is digitally compensated, using an external temperature sensor. The LMP91300 provides programmable thresholds, programmable temperature compensation and programmable oscillation frequency range. Due to its programmability, the LMP91300 can be used with a wide variety of external inductors and its detection thresholds can be adjusted to the desired detection distances.

An internal voltage regulator allows the device to operate with a supply from 6.5V to 40V. The output can be programmed to drive an external transistor in either NPN or PNP mode.

Available in 4mm × 5mm 24-terminal WQFN and 2.05mm × 2.67mm 20-terminal DSBGA packages, the LMP91300 operates from –40°C to +125°C.


  • Post Production Configuration and Calibration
  • Programmable Decision Thresholds
  • Programmable Hysteresis
  • Flexible Overload Protection
  • Digital Temperature Compensation
  • Integrated LED driver
  • Small Form Factor, Supports 4mm Sensors
    (DSBGA Package)
  • Low Power Consumption
  • Integrated Voltage Regulator
  • 3-Wire Capability
  • Supports NPN and PNP Modes
  • Normally Open (NO) and Normally Closed (NC)
  • 16-bit Resolution Threshold Setting

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Parametrics Compare all products in Inductive Switches

# Input Channels
Analog Supply (V) (Min)
Analog Supply (V) (Max)
Sensor Frequency (Hz)
Operating Temperature Range (C)
LMP91300 LDC0851
1    1   
6.5    1.8   
40    3.3   
SWIF    Push/Pull   
5k to 5M    300KHz to 19MHz   
-40 to 125    -40 to 125