1 Features
• Industry-Standard Sensor Gain/Offset:
– 10mV/°C, 500mV at 0°C
– Drop-in functional equivalent to LM50C
• LMT90 Temperature Accuracy:
– ±3°C (Max) at 25°C
– ±4°C (Max) over −40°C to +125°C
• Operating supply range: 4.5V to 10V
• Quiescent Current (Typ): 95μA
• Available in Standard SOT23-3 package
• Nonlinearity: ±0.8°C (Max)
• DC Output Impedance: 2kΩ/4kΩ (typ/Max)
– Enables driving large capacitive loads
• Cost-Effective Alternative to Thermistors

2 Applications
• Mobile phones, PC & notebooks
• Data storage
• Battery Management
• Home and Multifunction printers
• Medical and healthcare Instruments
• HVAC System
• Power Supply Modules

3 Description
The LMT90 device is a cost-optimized precision
analog temperature sensor developed as a linear
alternative to discrete thermistors. This device can
measure temperatures from -40°C to 125°C using
a single positive supply. The output voltage of
the device is linearly proportional to temperature
(10mV/°C) and has a DC offset of 500mV at 0°C. The
offset allows reading negative temperatures without
the need for a negative supply. The output voltage of
the LMT90 ranges from 100mV (at –40°C) to 1.75V
(at 125°C), simplifying analog-to-digital converter
(ADC) interfacing.
The LMT90 is a drop-in equivalent to LM50C and
does not require any external calibration, trimming
or software linearization leading to simplifying the
circuitry requirements in a single supply environment.
Due to low quiescent current of LMT90 (typically
around 95μA), self-heating is limited to a very low
0.2°C (in still air). This device is suitable for HVAC,
appliance, and consumer electronics applications.
Trimming and calibration of the LMT90 at the
wafer level supports long-term availability, low cost
and consistent accuracy (±3°C at 25°C, ±4°C over
temperature range).