SNOSAW8E May 2008  – September 2015 LM7321 , LM7322


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description continued
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2ESD Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5 2.7-V Electrical Characteristics
    6. 7.6 ±5-V Electrical Characteristics
    7. 7.7 ±15-V Electrical Characteristics
    8. 7.8Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Output Short Circuit Current and Dissipation Issues
      2. 8.3.2Estimating the Output Voltage Swing
    4. 8.4Device Functional Modes
      1. 8.4.1Driving Capacitive Loads
  9. Application and Implementation
    1. 9.1Application Information
      1. 9.1.1Similar High-Output Devices
      2. 9.1.2Other High Performance SOT-23 Ampliers
    2. 9.2Typical Application
      1. 9.2.1Design Requirements
      2. 9.2.2Detailed Design Procedure
      3. 9.2.3Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
  12. 12Device and Documentation Support
    1. 12.1Related Links
    2. 12.2Community Resources
    3. 12.3Trademarks
    4. 12.4Electrostatic Discharge Caution
    5. 12.5Glossary
  13. 13Mechanical, Packaging, and Orderable Information


机械数据 (封装 | 引脚)

1 Features

  • (VS = ±15, TA = 25°C, Typical Values Unless Specified.)
  • Wide Supply Voltage Range 2.5 V to 32 V
  • Output Current +65 mA/−100 mA
  • Gain Bandwidth Product 20 MHz
  • Slew Rate 18 V/µs
  • Capacitive Load Tolerance Unlimited
  • Input Common-Mode Voltage 0.3-V Beyond Rails
  • Input Voltage Noise 15 nV/√Hz
  • Input Current Noise 1.3 pA/√Hz
  • Supply Current/Channel 1.1 mA
  • Distortion THD+Noise −86 dB
  • Temperature Range −40°C to 125°C
  • Tested at −40°C, 25°C and 125°C at 2.7 V, ±5 V, ±15 V.
  • LM732xx are Automotive Grade Products that are AEC-Q100 Grade 1 Qualified.

2 Applications

  • Driving MOSFETs and Power Transistors
  • Capacitive Proximity Sensors
  • Driving Analog Optocouplers
  • High-Side Sensing
  • Below Ground Current Sensing
  • Photodiode Biasing
  • Driving Varactor Diodes in PLLs
  • Wide Voltage Range Power supplies
  • Automotive
  • International Power Supplies

3 Description

The LM732xx devices are rail-to-rail input and output amplifiers with wide operating voltages and high-output currents. The LM732xx family is efficient, achieving 18-V/µs slew rate and 20-MHz unity gain bandwidth while requiring only 1 mA of supply current per op amp. The LM732xx device performance is fully specified for operation at 2.7 V, ±5 V and ±15 V.

The LM732xx devices are designed to drive unlimited capacitive loads without oscillations. All LM7321x and LM7322x parts are tested at −40°C, 125°C, and 25°C, with modern automatic test equipment. High performance from −40°C to 125°C, detailed specifications, and extensive testing makes them suitable for industrial, automotive, and communications applications.

Greater than rail-to-rail input common-mode voltage range with 50 dB of common-mode rejection across this wide voltage range, allows both high-side and low-side sensing. Most device parameters are insensitive to power supply voltage, and this makes the parts easier to use where supply voltage may vary, such as automotive electrical systems and battery powered equipment. These amplifiers have true rail-to-rail output and can supply a respectable amount of current (15 mA) with minimal head- room from either rail (300 mV) at low distortion (0.05% THD+Noise).

Device Information(1)

SOIC (8)4.90 mm × 3.91 mm
SOT (5)2.90 mm × 1.60 mm
LM7322VSSOP (8)3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Output Swing vs. Sourcing Current

LM7321 LM7322 20205736.gif

Large Signal Step Response

LM7321 LM7322 20205749.gif