SNIS121J June   1999  – November 2016 LM61

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 LM61 Transfer Function
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Temperature Sensing Circuit
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Capacitive Loads
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Other Application Circuits
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Mounting
    2. 10.2 Layout Examples
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Calibrated Linear Scale Factor of 10 mV/°C
  • Rated for Full Temperature Range (–30° to 100°C)
  • Suitable for Remote Applications
  • UL Recognized Component
  • ±2°C or ±3°C Accuracy at 25°C (Maximum)
  • ±3°C Accuracy for –25°C to 85°C (Maximum)
  • ±4°C Accuracy for –30°C to 100°C (Maximum)
  • 10 mV/°C Temperature Slope (Maximum)
  • 2.7-V to 10-V Power Supply Voltage Range
  • 125-µA Current Drain at 25°C (Maximum)
  • ±0.8°C Nonlinearity (Maximum)
  • 800-Ω Output Impedance (Maximum)

2 Applications

  • Cellular Phones
  • Computers
  • Power Supply Modules
  • Battery Management
  • FAX Machines
  • Printers
  • HVAC
  • Disk Drives
  • Appliances

3 Description

The LM61 device is a precision, integrated-circuit temperature sensor that can sense a –30°C to 100°C temperature range while operating from a single 2.7‑V supply. The output voltage of the LM61 is linearly proportional to temperature (10 mV/°C) and has a DC offset of 600 mV. The offset allows reading negative temperatures without the need for a negative supply. The nominal output voltage of the LM61 ranges from 300 mV to 1600 mV for a –30°C to 100°C temperature range. The LM61 is calibrated to provide accuracies of ±2°C at room temperature and ±3°C over the full –25°C to 85°C temperature range.

The linear output of the LM61, 600-mV offset, and factory calibration simplify external circuitry required in a single supply environment where reading negative temperatures is required. Because the quiescent current is less than 125 µA, self-heating is limited to a very low 0.2°C in still air. Shutdown capability for the LM61 is intrinsic because its inherent low power consumption allows it to be powered directly from the output of many logic gates.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LM61 SOT-23 (3) 1.30 mm × 2.92 mm
TO-92 (3) 4.30 mm × 4.30 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application

LM61 1289702.gif
VO = (10 mV/°C × T°C) + 600 mV

Key Specifications

VALUE
Accuracy at 25°C ±2°C or ±3°C
Accuracy for –25°C to 85°C ±3°C
Accuracy for –30°C to 100°C ±4°C
Temperature slope 10 mV/°C
Power supply voltage 2.7 V to 10 V
Current drain at 25°C 125 µA
Nonlinearity ±0.8°C
Output impedance 800 Ω