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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-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, ultrahigh

input impedance instrumentation amplifiers, and

sensitive electrical-field measurement circuits.