Product details

Number of channels (#) 1 Total supply voltage (Max) (+5V=5, +/-5V=10) 15.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 4.5 Rail-to-rail In to V-, Out GBW (Typ) (MHz) 1.3 Slew rate (Typ) (V/us) 1.5 Vos (offset voltage @ 25 C) (Max) (mV) 0.35 Iq per channel (Typ) (mA) 0.45 Vn at 1 kHz (Typ) (nV/rtHz) 22 Rating Catalog Operating temperature range (C) -40 to 85 Offset drift (Typ) (uV/C) 2.5 Features Input bias current (Max) (pA) 0.025 CMRR (Typ) (dB) 83 Output current (Typ) (mA) 21 Architecture CMOS
Number of channels (#) 1 Total supply voltage (Max) (+5V=5, +/-5V=10) 15.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 4.5 Rail-to-rail In to V-, Out GBW (Typ) (MHz) 1.3 Slew rate (Typ) (V/us) 1.5 Vos (offset voltage @ 25 C) (Max) (mV) 0.35 Iq per channel (Typ) (mA) 0.45 Vn at 1 kHz (Typ) (nV/rtHz) 22 Rating Catalog Operating temperature range (C) -40 to 85 Offset drift (Typ) (uV/C) 2.5 Features Input bias current (Max) (pA) 0.025 CMRR (Typ) (dB) 83 Output current (Typ) (mA) 21 Architecture CMOS
PDIP (P) 8 93 mm² 9.81 x 9.43
  • (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
  • (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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet LMC6001 Ultra, Ultra-Low Input Current Amplifier datasheet (Rev. I) 29 Sep 2015
Technical article What is an op amp? 21 Jan 2020
Technical article How to lay out a PCB for high-performance, low-side current-sensing designs 06 Feb 2018
Technical article Low-side current sensing for high-performance cost-sensitive applications 22 Jan 2018
Technical article Voltage and current sensing in HEV/EV applications 22 Nov 2017
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

LMC6001 PSPICE Model (Rev. A)

SNOM216A.ZIP (17 KB) - PSpice Model
Simulation model

LMC6001B PSpice Model

SNOM690.ZIP (15 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Design tool

CIRCUIT060013 — Inverting amplifier with T-network feedback circuit

This design inverts the input signal, VIN, and applies a signal gain of 1000 V/V or 60 dB. The inverting amplifier with T-feedback network can be used to obtain a high gain without a small value for R4 or very large values for the feedback resistors.
Design tool

CIRCUIT060015 — Adjustable reference voltage circuit

This circuit combines an inverting and non-inverting amplifier to make a reference voltage adjustable from the negative of the input voltage up to the input voltage. Gain can be added to increase the maximum negative reference level.
Design tool

CIRCUIT060074 — High-side current sensing with comparator circuit

This high-side, current sensing solution uses one comparator with a rail-to-rail input common mode range to create an over-current alert (OC-Alert) signal at the comparator output (COMP OUT) if the load current rises above 1 A. The OC-Alert signal in this implementation is active low. So when the (...)
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