498 Hybrid AC Current Pre-amplifier-DC Nanoammeter Module

Channel 1 input

Current input to trans-impedance amplifier

Channel 2 input

Current input to trans-impedance amplifier

Gain Ranges

10⁸-10³ V/A

Maximum Current Input

10mA

Gain Accuracy

+1%

Gain Stability

200ppm/°C

Output Stability

5ppm/°C to 500ppm/°C depending on sensitivity

Linearity

< 0.025% departure from linearity from zero to full scale

ADC Resolution

4½ digit BCD (0 to 19999) i.e. > 14 bit resolution

ADC Integration Time

100ms

Input Impedance

Virtual earth

Frequency Response 10³ V/A Range (-3dB)

> 1MHz

Frequency Response 10⁴ V/A Range (-3dB)

1MHz

Frequency Response 10⁵ V/A Range (-3dB)

260kHz

Frequency Response 10⁶ V/A Range (-3dB)

30kHz

Frequency Response 10⁷ V/A Range (-3dB)

23kHz

Frequency Response 10⁸ V/A Range (-3dB)

4kHz

Interface

USB via 417/417T Unit (I²C)

Control

Front panel/ USB

Front Panel Controlled Features

Input select, gain range select

Dimensions

Dual width module, 3U high

Connector

BNC

Display

Digital display of 417 unit, channel A