SNOS694I March 1995  – September 2015 LMC6001


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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 DC Electrical Characteristics for LMC6001AI
    6. 6.6 DC Electrical Characteristics for LMC6001BI
    7. 6.7 DC Electrical Characteristics for LMC6001CI
    8. 6.8 AC Electrical Characteristics for LMC6001AIC
    9. 6.9 AC Electrical Characteristics for LM6001BI
    10. 6.10AC Electrical Characteristics for LMC6001CI
    11. 6.11Dissipation Ratings
    12. 6.12Typical Characteristics
  7. Detailed Description
    1. 7.1Overview
    2. 7.2Functional Block Diagram
    3. 7.3Feature Description
      1. 7.3.1Amplifier Topology
      2. 7.3.2Latch-Up Prevention
    4. 7.4Device Functional Modes
  8. Applications and Implementation
    1. 8.1Application Information
      1. 8.1.1Compensating For Input Capacitance
      2. 8.1.2Capacitive Load Tolerance
    2. 8.2Typical Application
      1. 8.2.1Two Op Amp, Temperature Compensated Ph Probe Amplifier
        1. Requirements
        2. Design Procedure
        3. Curve
    3. 8.3System Example
      1. 8.3.1Ultra-Low Input Current Instrumentation Amplifier
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1Layout Guidelines
      1. 10.1.1Printed-Circuit-Board Layout For High-Impedance Work
    2. 10.2Layout Example
  11. 11Device and Documentation Support
    1. 11.1Documentation Support
      1. 11.1.1Related Documentation
    2. 11.2Related Links
    3. 11.3Community Resources
    4. 11.4Trademarks
    5. 11.5Electrostatic Discharge Caution
    6. 11.6Glossary
  12. 12Mechanical, Packaging, and Orderable Information


机械数据 (封装 | 引脚)

1 Features

  • (Maximum Limit, 25°C Unless Otherwise Noted)
  • Input Current (100% Tested): 25 fA
  • Input Current Over Temperature: 2 pA
  • Low Power: 750 μA
  • Low VOS: 350 μV
  • Low Noise: 22 nV/√Hz at 1 kHz Typical

2 Applications

  • Electrometer Amplifiers
  • Photodiode Preamplifiers
  • Ion Detectors
  • A.T.E. Leakage Testing

3 Description

Featuring 100% tested input currents of 25 fA maximum, low operating power, and ESD protection of 2000 V, the LMC6001 device achieves a new industry benchmark for low input current operational amplifiers. By tightly controlling the molding compound, Texas Instruments is able to offer this ultra-low input current in a lower cost molded package.

To avoid long turnon settling times common in other low input current op amps, the LMC6001A is tested three times in the first minute of operation. Even units that meet the 25-fA limit are rejected if they drift.

Because of the ultra-low input current noise of 0.13 fA/√Hz, the LMC6001 can provide almost noiseless amplification of high resistance signal sources. Adding only 1 dB at 100 kΩ, 0.1 dB at 1 MΩ and 0.01 dB or less from 10 MΩ to 2,000 MΩ, the LMC6001 is an almost noiseless amplifier.

The LMC6001 is ideally suited for electrometer applications requiring ultra-low input leakage such as sensitive photodetection transimpedance amplifiers and sensor amplifiers. Because input referred noise is only 22 nV/√Hz, the LMC6001 can achieve higher signal to noise ratio than JFET input type electrometer amplifiers. Other applications of the LMC6001 include long interval integrators, ultra-high input impedance instrumentation amplifiers, and sensitive electrical-field measurement circuits.

Device Information(1)

LMC6001PDIP (8)9.81 mm × 6.35 mm
TO-99 (8)9.08 mm × 9.08 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

LMC6001 typ_app_snos695.gif