SNOSCS3A – SEPTEMBER 2013 – REVISED OCTOBER 2013
LMP91300 Industrial Inductive Proximity Sensor AFE
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FEATURES
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)
Supported
16-bit Resolution Threshold Setting
DESCRIPTION
The LMP91300 is a complete analog front end (AFE)
optimized for use in industrial inductive proximity
sensors. The LMP91300 directly converts the R
P
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 4×5mm 24-pin WQFN and 2.05×2.67mm
20-pin DSBGA packages, the LMP91300 operates
from -40°C to +125°C.
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APPLICATIONS
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Industrial Proximity Detection
Industrial Production Lines
Industrial Automation
FUNCTIONAL BLOCK DIAGRAM
EXT B
OTP Memory
V+/EXT E
Voltage Regulator
CBY
INA
Oscillator
Digital Temp
Correction
SENSE1+
Comparator
Driver
SENSE2+
DRIVE
LED
Drive
Serial
Interface
SENSE-
SENSE1+
SENSE2+/
SWIF RX
SWDRV
SENSE-
INB
Direct R
P
to
Digital Converter
Temp
Sensor
CFA
CFB
TEMP
Figure 1. LMP91300 Block Diagram
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated
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