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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 Pin-to-pin upgrade with improved accuracy and extended operating temperature: -55°C to 175°C.

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) (bps) 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) (bps) 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
Application note LM71/LM71-Q1 Errata 13 Jul 2018
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

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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Support software

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

Evaluation Board Software for Hardware Monitors and Digital Temperature Sensors
Supported products & hardware

Supported products & hardware

Products
Digital temperature sensors
LM63 — 1 remote and local temperature sensor with fan control LM64 — 1 remote and local temp sensor with fan control and 5 GPIO's LM71 — ±1.5°C Temperature Sensor with SPI Interface LM71-Q1 — Automotive Grade, ±1.5°C Temperature Sensor with SPI Interface LM73 — ±1°C Temperature Sensor with I2C/SMBus Interface LM86 — ±0.75°C remote and local temperature sensor with SMBus interface LM89 — ±0.75°C remote and local temperature sensor with SMBus interface and 2 addresses for bus sharing LM90 — Remote and Local Temperature Sensor with SMBus Interface LM93 — 2 remote, 1 local temp sensor with hardware monitor and 16 power supply voltage monitors LM95010 — ±2°C Temperature Sensor with SensorPath Interface LM95071 — ±1°C Temperature Sensor with SPI Interface LM95221 — ±3°C dual remote & local temperature sensor with beta compensation and SMBus, I2C LM95231 — Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95235 — ±0.75°C remote & local temperature sensor with SMBus, beta compensation for 65/90n LM95235-Q1 — Automotive Grade, ±2°C Remote and Local Temperature Sensor with TruTherm Technology and SMBus LM96000 — Hardware monitor with fan control and 6 power supply voltage monitors LM96080 — 1 local temp sensor with fan speed and power supply voltage monitor LM96163 — 1 remote and local temp sensor with beta compensation and fan control LM99 — Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface
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Support software

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 (...)
Supported products & hardware

Supported products & hardware

Products
Digital temperature sensors
LM63 — 1 remote and local temperature sensor with fan control LM64 — 1 remote and local temp sensor with fan control and 5 GPIO's LM71 — ±1.5°C Temperature Sensor with SPI Interface LM71-Q1 — Automotive Grade, ±1.5°C Temperature Sensor with SPI Interface LM73 — ±1°C Temperature Sensor with I2C/SMBus Interface LM75A — 2C industry standard temperature sensor, I2C/SMBus interface LM86 — ±0.75°C remote and local temperature sensor with SMBus interface LM89 — ±0.75°C remote and local temperature sensor with SMBus interface and 2 addresses for bus sharing LM90 — Remote and Local Temperature Sensor with SMBus Interface LM93 — 2 remote, 1 local temp sensor with hardware monitor and 16 power supply voltage monitors LM95010 — ±2°C Temperature Sensor with SensorPath Interface LM95071 — ±1°C Temperature Sensor with SPI Interface LM95172-Q1 — Automotive Grade, ±1°C Temperature Sensor with 200°C Capability and SPI Interface LM95214 — ±2°C Quad Remote and Local Temperature Sensor with SMBus Interface LM95221 — ±3°C dual remote & local temperature sensor with beta compensation and SMBus, I2C LM95231 — Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95233 — ±2°C Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95234 — ±2°C Quad Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95235 — ±0.75°C remote & local temperature sensor with SMBus, beta compensation for 65/90n LM95235-Q1 — Automotive Grade, ±2°C Remote and Local Temperature Sensor with TruTherm Technology and SMBus LM95241 — ±1.25°C dual remote & local temperature sensor with beta compensation and SMBus, I LM95245 — ±0.75°C remote & local temperature sensor with SMBus, beta compensation for 45nm d LM96000 — Hardware monitor with fan control and 6 power supply voltage monitors LM96080 — 1 local temp sensor with fan speed and power supply voltage monitor LM96163 — 1 remote and local temp sensor with beta compensation and fan control LM99 — Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface
Precision ADCs
ADC128D818 — 12-Bit, 82SPS, 8-Ch Delta-Sigma ADC with Temp Sensor, INT / EXT Voltage Reference & I2C Interface
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Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBV) 5 Ultra Librarian
WSON (NGG) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

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