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LM20

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±1.5°C Analog Output Temperature Sensor

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±1.5°C Analog Output Temperature Sensor

LM20

ACTIVE
Data sheet Order now

Product details

Parameters

Local sensor accuracy (Max) (+/- C) 1.5 Operating temperature range (C) -40 to 125, -55 to 130 Supply voltage (Min) (V) 2.4 Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 7 Sensor gain (mV/Deg C) -11.7 Rating Catalog Features Industry standard pinout, UL recognized Interface Analog Output open-in-new Find other Analog temperature sensors

Package | Pins | Size

DSBGA (YZR) 4 2 mm² 1.003 x 1.003 SOT-SC70 (DCK) 5 4 mm² 2 x 2.1 open-in-new Find other Analog temperature sensors

Features

  • Rated for −55°C to 130°C Range
  • Available in SC70 and DSBGA Package
  • Predictable Curvature Error
  • Suitable for Remote Applications
  • Accuracy at 30°C ±1.5 to ±4°C (Maximum)
  • Accuracy at 130°C and −55°C ±2.5 to ±5°C (Maximum)
  • Power Supply Voltage Range 2.4 V to 5.5 V
  • Current Drain 10 μA (Maximum)
  • Nonlinearity ±0.4% (Typical)
  • Output Impedance 160 Ω (Maximum)
  • Load Regulation
       0 μA < IL< 16 μA −2.5 mV (Maximum)

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Description

The LM20 is a precision analog output CMOS integrated-circuit temperature sensor that operates over −55°C to 130°C. The power supply operating range is 2.4 V to 5.5 V. The transfer function of LM20 is predominately linear, yet has a slight predictable parabolic curvature. The accuracy of the LM20 when specified to a parabolic transfer function is ±1.5°C at an ambient temperature of 30°C. The temperature error increases linearly and reaches a maximum of ±2.5°C at the temperature range extremes. The temperature range is affected by the power supply voltage. At a power supply voltage of 2.7 V to 5.5 V, the temperature range extremes are 130°C and −55°C. Decreasing the power supply voltage to 2.4 V changes the negative extreme to −30°C, while the positive extreme remains at 130°C.

The LM20 quiescent current is less than 10 μA. Therefore, self-heating is less than 0.02°C in still air. Shutdown capability for the LM20 is intrinsic because its inherent low power consumption allows it to be powered directly from the output of many logic gates or does not necessitate shutdown.

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Technical documentation

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Type Title Date
* Datasheet LM20 2.4-V, 10-µA, SC70, DSBGA Temperature Sensor datasheet (Rev. Q) Jan. 31, 2015
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
More literature UL Certificate of Compliance Vol1-Sec12 E232195 Aug. 06, 2018
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018
Selection guides Temperature sensors for optical modules Mar. 13, 2018
Application notes AN-1256 Tiny Temperature Sensors for Portable Systems (Rev. A) Apr. 26, 2013
User guides LM20X User's Guide Feb. 28, 2013
Application notes Tiny Temperature Sensors for Remote Systems Feb. 17, 2003

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$75.00
Description

The Texas Instruments LM20xEVM evaluation module (EVM) helps designers evaluate the operation and performance of the LM20B, LM20C, and LM20S analog temperature sensors.

Features
  • Evaluation board for variety of analog temperature sensor products
  • The board is user-friendly, and has access to the temp sensor output pins
  • This EVM replaces the LM20C-EVAL, LM20C-EVAL, and LM20S-EVAL boards
    • View details

    Reference designs

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    Design files
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    REFERENCE DESIGNS Download
    24-V/500-W resonant converter reference design with HV GaN FET
    PMP21309 — This reference design is a high-frequency resonant converter reference design. The output voltage is regulated to 24 V with input voltage ranges from 380 V to 400 V using a resonant tank with 500 kHz resonant frequency. A 97.9% peak efficiency is achieved with this design using TI’s (...)
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    REFERENCE DESIGNS Download
    12-V/500-W resonant converter reference design with HV GaN FET
    PMP21842 — This high-frequency resonant converter reference design regulates a 12-V output from a 380-V to 400-V input voltage range using a resonant tank with 500 kHz resonant frequency. A peak efficiency of 96.0% (bias supply included) is achieved with this design using our high-voltage GaN device along with (...)
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    180-W, Dual-Channel, Step-Down Converter Reference Design with 97% Efficiency for Server PSU
    TIDA-01444 — The TIDA-01444 reference design for server PSU, PC PSU, and other step-down converter applications implements a 180-W buck, dual-channel DC-DC converter with a regulatory 12-V DC input voltage designed to provide the terminal load voltage with greater than 97% efficiency and good thermal (...)
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    REFERENCE DESIGNS Download
    High Efficiency and Power Density 1kW Resonant Converter Reference Design with High Voltage GaN FET
    PMP20978 — The PMP20978 reference design is a high efficiency, high power density and light weight resonant converter reference design. It converts a 390V input to a 48V/1kW output. The PMP20637 power stage has over 140W/in^3 power density. The whole board weight is less than 230g. With fixed 950kHz switching (...)
    document-generic Schematic document-generic User guide
    Design files
    View details
    REFERENCE DESIGNS Download
    360W Phase Shift Full Bridge Resonant LLC with High Side Low Side Driver Reference Design
    TIDA-00381 — The power supply employs Full Bridge Resonant LLC with phase shift operating at ramp up, light load, low output voltage. This operating mode can replace PWM operating mode in LLC, which can improve efficiency signficantly in light load.
    document-generic Schematic document-generic User guide

    CAD/CAE symbols

    Package Pins Download
    DSBGA (YZR) 4 View options
    SC70 (DCK) 5 View options

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