Agilent/Keysight 44470A

The Keysight 44470A is a 10-channel analog multiplexer module designed for signal routing in automated test systems. It uses armature latching relays to switch signals up to 250V, 2A, and 60W (125VA) per channel to a common bus, supporting both single-channel break-before-make and multiple-channels-closed operation. With thermal offset below 3 µV per channel and closed-channel resistance under 1 Ohm, the module is optimized for precision low-level measurements.

The removable screw terminal block simplifies wiring, while onboard provisions allow integration of attenuators or filter networks.

Technical Specifications

• 10 channels with armature latching relay switching


• Maximum switching: 250V, 2A, 60W or 125VA per channel


• Thermal offset: 43 channels/second


• Closed-channel resistance: 10¹¹ Ohm; HI-LO >10¹⁰ Ohm; channel-chassis >10¹⁰ Ohm


• AC isolation (1 channel closed): channel-channel <5 pF; HI-LO <27 pF; channel-chassis <80 pF


• Insertion loss at 50 Ohm: 100 kHz <0.20 dB; 1 MHz <0.25 dB; 10 MHz <0.50 dB


• Crosstalk at 50 Ohm: 100 kHz <-73 dB; 1 MHz <-53 dB; 10 MHz <-33 dB

Key Features

• Dual operating modes: single-channel break-before-make or multiple channels simultaneously closed


• Low thermal offset for precision analog measurements


• Configurable for four-wire resistance measurements using paired module programming


• High DC and AC isolation across all channel-to-channel paths


• Low insertion loss across audio and RF frequencies


• Removable screw terminal connectors for field installation

Typical Applications

• Multi-source to single-instrument signal routing


• Single-source distribution to multiple test points


• Low-level DC and AC signal switching


• Resistance and impedance measurement systems

Compatibility & Integration Designed as an option module for the Keysight 3488A mainframe. Screw terminal block provides standard laboratory integration.