SLPS730B august   2021  – august 2023 JFE2140

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 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
  8. 7 Parameter Measurement Information
    1. 7.1 AC Measurement Configurations
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Precision Matching
      2. 8.3.2 Ultra-Low Noise
      3. 8.3.3 Low Gate Current
      4. 8.3.4 Input Protection
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Input Protection Diodes
      2. 9.1.2 Cascode Configuration
      3. 9.1.3 Common-Source Amplifier
      4. 9.1.4 Composite Amplifiers
    2. 9.2 Typical Applications
      1. 9.2.1 Low-Noise, Low-Power, High-Input-Impedance Composite Amplifier
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Differential Front-End Design
        1. 9.2.2.1 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
        1. 10.1.1.1 PSpice® for TI
        2. 10.1.1.2 TINA-TI™ Simulation Software (Free Download)
        3. 10.1.1.3 TI Reference Designs
        4. 10.1.1.4 Filter Design Tool
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.3 Low Gate Current

The JFE2140 features a maximum gate current of 10 pA at room temperature, making the device an excellent choice for maximizing the gain and dynamic range from extremely high impedance sensors. Additionally, any noise contributions as a result of gate current are minimized because of the negligible shot noise at low current levels. As with all JFET devices, when the drain-to-source voltage increases, the gate current also increases. Keep the drain-to-source voltage to less than 5 V for the lowest gate input current operation.