SNOSD60 June 2017 LMC6001-MIL


  1. Features
  2. Applications
  3. Description
  4. Pin Configuration and Functions
  5. Specifications
    1. 5.1Absolute Maximum Ratings
    2. 5.2ESD Ratings
    3. 5.3Recommended Operating Conditions
    4. 5.4Thermal Information
    5. 5.5DC Electrical Characteristics for LMC6001AI
    6. 5.6Dissipation Ratings
    7. 5.7Typical Characteristics
  6. Detailed Description
    1. 6.1Overview
    2. 6.2Functional Block Diagram
    3. 6.3Feature Description
      1. 6.3.1Amplifier Topology
      2. 6.3.2Latch-up Prevention
    4. 6.4Device Functional Modes
  7. Applications and Implementation
    1. 7.1Application Information
      1. 7.1.1Compensating for Input Capacitance
      2. 7.1.2Capacitive Load Tolerance
    2. 7.2Typical Application
      1. 7.2.1Two Op Amp, Temperature Compensated Ph Probe Amplifier
        1. Requirements
        2. Design Procedure
        3. Curve
    3. 7.3System Example
      1. 7.3.1Ultra-Low Input Current Instrumentation Amplifier
  8. Power Supply Recommendations
  9. Layout
    1. 9.1Layout Guidelines
      1. 9.1.1Printed-Circuit-Board Layout For High-Impedance Work
    2. 9.2Layout Example
  10. 10Device and Documentation Support
    1. 10.1Documentation Support
      1. 10.1.1Related Documentation
    2. 10.2Related Links
    3. 10.3Community Resources
    4. 10.4Trademarks
    5. 10.5Electrostatic Discharge Caution
    6. 10.6Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
  • Y|0
Orderable Information


  • (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


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


Featuring 100% tested input currents of 25 fA maximum, low operating power, and ESD protection of 2000 V, the LMC6001-MIL 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-MIL 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-MIL is an almost noiseless amplifier.

The LMC6001-MIL 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-MIL can achieve higher signal to noise ratio than JFET input type electrometer amplifiers. Other applications of the LMC6001-MIL include long interval integrators, ultra-high input impedance instrumentation amplifiers, and sensitive electrical-field measurement circuits.

Device Information(1)

LMC6001-MILPDIP (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-MIL typ_app_snos695.gif