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LM71

ACTIVE

±1.5°C Temperature Sensor with SPI Interface

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Data sheet

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TMP127-Q1 ACTIVE Automotive ±0.8°C SPI temperature sensor with 175°C operation

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LM71

ACTIVE
Data sheet Order now

Product details

Local sensor accuracy (max) 1.5 Type Local Operating temperature range (°C) -40 to 150 Supply voltage (min) (V) 2.65 Interface type SPI Supply voltage (max) (V) 5.5 Supply current (max) (µA) 550 Temp resolution (max) (Bits) 14 Remote channels (#) 0 Rating Catalog
Local sensor accuracy (max) 1.5 Type Local Operating temperature range (°C) -40 to 150 Supply voltage (min) (V) 2.65 Interface type SPI Supply voltage (max) (V) 5.5 Supply current (max) (µA) 550 Temp resolution (max) (Bits) 14 Remote channels (#) 0 Rating Catalog
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 WSON (NGG) 6 9 mm² 3 x 3
  • LM71Q is AEC-Q100 Grade 0 Qualified and is Manufactured on an Automotive Grade Flow
  • 5-Pin SOT-23 Package or 6-Pin No-Pull-Back WSON Package
  • Operates Over a Full −40°C to +150°C Range
  • SPI and MICROWIRE Bus Interface
  • Key Specifications:
    • Supply Voltage: 2.65V to 5.5V
    • Supply Current
      • Operating: 300 µA (typ)
      • 550 µA (max)
    • Temperature Accuracy
      • −10°C to +65°C: ±1.5°C (max)
      • −40°C to 150°C: +3/− 2°C (max)
    • Temperature Resolution: 31.25 m°C
  • LM71Q is AEC-Q100 Grade 0 Qualified and is Manufactured on an Automotive Grade Flow
  • 5-Pin SOT-23 Package or 6-Pin No-Pull-Back WSON Package
  • Operates Over a Full −40°C to +150°C Range
  • SPI and MICROWIRE Bus Interface
  • Key Specifications:
    • Supply Voltage: 2.65V to 5.5V
    • Supply Current
      • Operating: 300 µA (typ)
      • 550 µA (max)
    • Temperature Accuracy
      • −10°C to +65°C: ±1.5°C (max)
      • −40°C to 150°C: +3/− 2°C (max)
    • Temperature Resolution: 31.25 m°C

The LM71 is a low-power, high-resolution digital temperature sensor with an SPI and MICROWIRE compatible interface, available in the 5-pin SOT-23 or the 6-pin WSON (no pull back) package. The host can query the LM71 at any time to read temperature. Its low operating current is useful in systems where low power consumption is critical.

The LM71 has 13-bit plus sign temperature resolution (0.03125°C per LSB) while operating over a temperature range of −40°C to +150°C.

The LM71’s 2.65V to 5.5V supply voltage range, fast conversion rate, low supply current, and simple SPI interface make it ideal for a wide range of applications. The LM71Q is available in the 5-lead SOT-23 package only.

The LM71 is a low-power, high-resolution digital temperature sensor with an SPI and MICROWIRE compatible interface, available in the 5-pin SOT-23 or the 6-pin WSON (no pull back) package. The host can query the LM71 at any time to read temperature. Its low operating current is useful in systems where low power consumption is critical.

The LM71 has 13-bit plus sign temperature resolution (0.03125°C per LSB) while operating over a temperature range of −40°C to +150°C.

The LM71’s 2.65V to 5.5V supply voltage range, fast conversion rate, low supply current, and simple SPI interface make it ideal for a wide range of applications. The LM71Q is available in the 5-lead SOT-23 package only.
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Technical documentation

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Type Title Date
* Data sheet LM71/LM71Q SPI/MICROWIRE 13-Bit Plus Sign Temperature Sensor datasheet (Rev. E) 16 Aug 2018
Technical article How to choose the right thermistor for your temperature sensing application 13 Feb 2020
Technical article How to enable thermal safety for automotive infotainment and cluster systems 15 Oct 2019
Technical article Driving industrial innovation with small-size sensors 12 Sep 2019
More literature LM71/LM71-Q1 Errata 13 Jul 2018
Technical article Where did the op amp ground pin go? 18 Mar 2016
More literature Die D/S LM71A MDA MCD1760A SPI/Microwire 13-Bit Plus Sign Temperature Sensor 19 Oct 2012
More literature Die D/S LM71A MDA MCD2190A SPI/Microwire 13-Bit Plus Sign Temperature Sensor 19 Oct 2012
More literature Die D/S LM71A MDO MCD5010A SPI/MICROWIRE 13-Bit Plus Sign Temperature Sensor 19 Oct 2012
More literature Die D/S LM71A MDO MCD6000A SPI/Microwire 13-Bit Plus Sign Temperature Sensor 19 Oct 2012
More literature Die D/S LM71A1 MDA MWA +1.5°C accuracy, SPI digital interface 19 Oct 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Driver or library

DIGITALTEMPSENSORSEVM-SW — Eval Board Software for Hardware Monitors and Digital Temp Sensors

Evaluation Board Software for Hardware Monitors and Digital Temperature Sensors
Download
Driver or library

LM70SW-LINUX — Linux Driver for LM70

The Linux driver supports the LM70 series of Temperature Sensors. The Linux driver supports communication through the SPI bus and interfaces with the Hardware Monitoring sub-system.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • lm70
  • tmp121
  • (...)
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Driver or library

SENSOREVAL — Eval Board Software For Hardware Monitors And Digital Temperature Sensors

SensorEval
SensorEval software supports the latest TI temperature sensor and hardware monitor evaluation boards via USB interface. It also allows access to sensors mounted directly on motherboards that support Intel chip sets.
  • Download SensorEval Software and Manual
  • Windows XP support is offered for (...)
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Package Pins Download
SOT-23 (DBV) 5 View options
WSON (NGG) 6 View options

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