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
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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