±1.25°C Temperature Sensor with SPI Interface

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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 1.25 Type Local Operating temperature range (C) -40 to 125, -55 to 150 Supply voltage (Min) (V) 2.65, 3 Interface type SPI Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 470 Temp resolution (Max) (bits) 13 Remote channels (#) 0 Addresses NA Rating Catalog open-in-new Find other Digital temperature sensors

Package | Pins | Size

DSBGA (YTA) 5 0 mm² 1.676 x 1.625 SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Digital temperature sensors

Features

  • 0.0625°C Temperature Resolution
  • Shutdown Mode Conserves Power Between Temperature Reading
  • SPI and MICROWIRE Bus Interface
  • 5-Bump DSBGA Package Saves Space

Key Specifications

  • Supply Voltage 3.0V or 2.65V to 5.5V
  • Supply Current
    • Operating265μA (typ)520μA (max)
    • Shutdown3μA (typ)
  • Temperature Accuracy
    • −10°C to 65°C, ±1.25°C(max)
    • −25°C to 110°C, ±2.1°C(max)
    • −55°C to 125°C, ±3°C(max)

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Description

The LM74 is a temperature sensor, Delta-Sigma analog-to-digital converter with an SPI and MICROWIRE compatible interface. The host can query the LM74 at any time to read temperature. A shutdown mode decreases power consumption to less than 10 μA. This mode is useful in systems where low average power consumption is critical.

The LM74 has 12-bit plus sign temperature resolution (0.0625°C per LSB) while operating over a temperature range of −55°C to +150°C.

The LM74's 3.0V to 5.5V supply voltage range, low supply current and simple SPI interface make it ideal for a wide range of applications. These include thermal management and protection applications in hard disk drives, printers, electronic test equipment, and office electronics. The LM74 is available in the SOIC package as well as the 5-Bump DSBGA package.

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Technical documentation

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Type Title Date
* Data sheet LM74 SPI/ MICROWIRE 12-Bit Plus Sign Temperature Sensor datasheet (Rev. K) Mar. 22, 2013
Technical article How to choose the right thermistor for your temperature sensing application Feb. 13, 2020
Technical article How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical article Driving industrial innovation with small-size sensors Sep. 12, 2019
Technical article How to select a temperature sensor probe Feb. 18, 2016
Application note AN-1256 Tiny Temperature Sensors for Portable Systems (Rev. A) Apr. 26, 2013
Application note Tiny Temperature Sensors for Remote Systems Feb. 17, 2003

Design & development

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Software development

DRIVER OR LIBRARY Download
Linux Driver for LM70
LM70SW-LINUX 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
  • lm71 (...)

CAD/CAE symbols

Package Pins Download
DSBGA (YTA) 5 View options
SOIC (D) 8 View options

Ordering & quality

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