1 Features
• AEC-Q100 qualified for automotive applications
– Device temperature grade-0: –55°C to 175°C
ambient operating temperature
– Device HBM classification level 2
– Device CDM classification level C2b
• Function Safety Capable
– Documentation available to aid functional safety
system design
• High accuracy
– ±0.25°C (maximum) from 20°C to 30°C
– ±0.3°C (maximum) from –20°C to 85°C
– ±0.4°C (maximum) from –40°C to 125°C
– ±0.5°C (maximum) from –55°C to 150°C
– ±0.75°C (maximum) from 150°C to 175°C
• Fast measurement intervals with no self-heating
concerns
• Supply range: 1.62 V to 5.5 V
• Factory-calibrated
– NIST traceability
• Low power consumption
• Programmable temperature alert limits
• Temperature slew rate warning
• Optional Cyclic Redundancy Check (CRC)
• 3-wire SPI interface

2 Applications
• Transmission Control Units
• On-board Chargers (OBC)
• Brake Systems
• Traction Inverters
• Vehicle Control Units (VCU)
• DC/DC Converters
• Power Distribution Units (PDU)
• Powertrain Exhaust Sensors

3 Description
The TMP126-Q1 is a 0.25°C accuracy digital
temperature that supports an ambient temperature
range of –55°C to 175°C. The TMP126-Q1 features
a 14-bit signed temperature resolution (0.03125°C per
LSB) while operating over a supply range of 1.62
V to 5.5 V. With a fast conversion rate, low supply
current, and a simple 3-wire SPI compatible interface,
the TMP126-Q1 is designed for a wide range of
applications.
The TMP126-Q1 includes additional advanced
features for increased reliability in harsh environments
such as optional CRC checksum for data integrity,
programmable alert limits, a temperature slew rate
warning, and an enhanced operational temperature
range. The device utilizes a NIST traceable factory
calibration for guaranteed accuracy and comes in
a small SOT package for close placement to heat
sources along with fast response times.