The Keysight Technologies (formerly Agilent / HP) 44470A is a 10-channel multiplexer module designed for use with the HP 3488A Switch/Control Unit. It provides dual-line (high and low) switching to a common bus, making it ideal for precision low-level signal routing, four-wire resistance measurements, and general-purpose signal scanning up to 250V and 2A.
Specifications
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered directly by HP 3488A mainframe |
| Operating Temperature | 0 to 55 °C |
| Weight | 0.31 kg |
| Mainframe Slots Occupied | 1 slot |
| Maximum Wire Size | 18 AWG |
| Shipping Weight | 0.77 kg |
| Form Factor | Plug-in module |
Channel and Configuration
| Parameter | Value |
|---|---|
| Number of Channels | 10 |
| Multiplexer Configuration | 10-channel, 2-wire |
| Relay Type | Latching electromechanical |
| Switch Type | Double-pole, single-throw (DPST) |
| Input Connector Type | Screw terminal block |
| Custom Circuit Provision | Provisions to add simple attenuators or filter networks |
| Operating Modes | Break-before-make or multiple channels close |
| 4-Wire Resistance Support | Card pair mode programming (using two 44470A modules) |
Electrical Specifications
| Parameter | Value |
|---|---|
| Maximum Switching Voltage (DC) | 250 V |
| Maximum Switching Voltage (AC RMS) | 250 V |
| Maximum Switching Current (DC) | 2 A |
| Maximum Switching Current (AC RMS) | 2 A |
| Maximum Carrying Current | 2 A |
| Maximum Switching Power (DC) | 60 W |
| Maximum Switching Power (AC) | 125 VA |
| Thermal Offset Voltage | < 3 µV |
| Closed-Channel Path Resistance | < 2 Ω |
| DC Isolation Resistance | 10^10 Ω (at 25 °C, 50% RH) |
AC and RF Performance
| Parameter | Value |
|---|---|
| Bandwidth (-3 dB) | 10 MHz (typical into 50 Ω) |
| Crosstalk (at 100 kHz) | < -75 dB |
| Crosstalk (at 1 MHz) | < -55 dB |
| Crosstalk (at 10 MHz) | < -35 dB |
Switching Characteristics and Lifetime
| Parameter | Value |
|---|---|
| Relay Actuation Time | 10 ms (typical) |
| Maximum Switching Rate | 40 channels/second |
| Mechanical Life Expectancy | 10,000,000 operations |
| Electrical Life Expectancy (At Rated Load) | 100,000 operations |
Power and Host Mainframe Integration
| Parameter | Value |
|---|---|
| Compatible Host Mainframe | HP / Agilent 3488A |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -40 °C to +75 °C |
| Operating Humidity | Up to 95% RH at 40 °C (non-condensing) |
Electrical Safety
| Parameter | Value |
|---|---|
| Maximum Terminal-to-Chassis Voltage | 250 V AC RMS / 250 V DC |
Connectivity
| Parameter | Value |
|---|---|
| Terminal Block Type | Removable screw terminal block |
Configuration
| Parameter | Value |
|---|---|
| Configurable Topologies | Single 1x10 or dual 1x5 multiplexer (selectable via internal jumpers) |
Technology
Electromechanical Relay
Applications
Signal routing, multiplexing, and precision low-level measurement scan