SE4002 FET Input Preamplifier

The SE4002 is a low-noise, ultra-high input impedance preamplifier with excellent common-mode rejection. It is designed to work with any Saluki digital lock-in amplifier. The preamplifier minimizes noise and pickup in the connecting lines and reduces measurement time in noise-limited experiments.

Key Features

6nV//√Hz input noise

Gain of 10/20/50/100, manual adjustment

FET input, 10 MΩ input impedance

Gain accuracy 2%

High common mode rejection

1Hz - 300kHz Gain bandwidth

Single-ended and differential inputs

Ultra small size and portable

Input Impedance



Single-ended or differential

Maximum Input

70mVrms (overload)

Noise (typ.)

5.6 nV/√Hz at 99.7 kHz

5.7 nV/√Hz at 9.7 kHz

6.2 nV/√Hz at 997 Hz

22.1 nV/√Hz at 9.7 Hz


SAC (0.16Hz)


> 100dB

Input Bandwidth

1Hz – 300kHz


10, 20, 50, 100

Gain Accuracy

2% (max.)


A (signal, single-ended)

B (shielded ground)

Maximum Output

7 Vrms

(Note: see more detail information in the ‘Resource’ – ‘Datasheet’)

Main Machine

Module No. Item Description
SE4002 FET Input Preamplifier 10 MΩ input impedance
Saluki Technology