The LS4118A is an Ultra-High Input Impedance N-Channel JFET
The LS4118A provides ultra-high input impedance. The device is specified with a 1-pA limit and typically operates at 0.2 pA. The part is ideal for use as a high-impedance sensitive front-end amplifier.
FEATURES
DIRECT REPLACEMENT FOR SILICONIX 2N4118A
LOW POWER IDSS<90 µA
MINIMUM CIRCUIT LOADING IGSS<1 pA
LS4118A Benefits:
◾ Insignificant Signal Loss / Error Voltage with High-Impedance Source
◾ Low Power Consumption (Battery)
◾ Maximum Signal Output, Low Noise
◾ High Sensitivity to Low-Level Signals
LS4118A Applications:
◾ High-Impedance Transducer
◾ Smoke Detector Input
◾ Infrared Detector Amplifier
◾ Precision Test Equipment