498 Hybrid AC Current Pre-amplifier-DC Nanoammeter Module

  • 498 modular hybrid AC current pre-amplifier-DC nanoammeter unit

In the AC mode, the 498 is deployed as a pre-amplifier for lock-in amplifiers employing current source detectors, i.e. photomultipliers and photodiodes.

In DC mode, the 498 nanoammeter represents the main detection electronic. Offering short-circuit detector operation and an impressive six decades of gain, wide dynamic range measurements with excellent linearity can be realised.

The 498 can be operated from the front panel or fully automated over the USB interface. Over-load and under-load flags are included to enhance optimal remote operation.

Core benefits

Features

  • Dual width module housed within the 417/417T unit
  • Dual input lock-in pre-amplifier
  • Dual input nanoammeter
  • Virtual ground input
  • Front panel control
  • Fully programmable via USB 2.0 interface

Electrical

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 & Mechanical

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

Ordering Information

S400_498

498 Hybrid AC Current Pre-amplifier-DC Nanoammeter Module

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