The Keysight 34904A is a 4x8 Matrix Switch module designed for the 34970A and 34972A Data Acquisition/Switch Units. It features 32 two-wire crosspoints, offering a flexible connection path to connect multiple instruments to various points on a device under test (DUT) simultaneously. Multiple modules can be combined to build larger matrices, with up to 96 crosspoints supported in a single mainframe.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Internal backplane interface to mainframe, built-in screw terminal blocks |
| Display | None (status displayed on mainframe front panel) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered directly by 34970A/34972A mainframe backplane |
| Operating Temperature | 0°C to 55°C |
| Weight | 0.35 kg |
Switching Specifications
| Parameter | Value |
|---|---|
| Matrix Configuration | 4 rows x 8 columns (2-wire) |
| Total Crosspoints | 32 |
| Switch Type | Armature Latching |
| Maximum Switching Voltage | 300 V (DC or AC RMS) |
| Maximum Switching Current | 1 A |
| Maximum Carrying Current | 1 A |
| Maximum Switching Power | 50 W |
| Volt-Hertz Limit | 1 x 10^7 V-Hz |
| Initial Contact Resistance | < 1.0 Ω |
| End-of-Life Contact Resistance | < 3.0 Ω |
| Thermal Offset (typical) | < 3 µV |
RF / AC Performance
| Parameter | Value |
|---|---|
| AC Bandwidth (-3 dB) | 10 MHz (typical into 50 Ω) |
| Crosstalk at 100 kHz | < -75 dB (typical) |
| Crosstalk at 1 MHz | < -55 dB (typical) |
| Crosstalk at 10 MHz | < -35 dB (typical) |
| Capacitance Row to Col (open) | 80 pF |
| Capacitance Row to Shield (open) | < 150 pF (typical) |
| Capacitance Col to Shield (open) | < 150 pF (typical) |
Reliability
| Parameter | Value |
|---|---|
| Mechanical Lifetime | 100,000,000 operations |
| Electrical Lifetime | 100,000 operations (at rated load) |
Physical & Connection
| Parameter | Value |
|---|---|
| Compatible Mainframes | Agilent / Keysight 34970A, 34972A |
| Slots Occupied | 1 |
Environmental
| Parameter | Value |
|---|---|
| Operating Humidity | 80% R.H. at 40°C (non-condensing) |
Connectivity
| Parameter | Value |
|---|---|
| Connector Type | Screw terminals |
Performance
| Parameter | Value |
|---|---|
| DC Isolation | > 10 GΩ (channel-to-channel, channel-to-earth, at 25 °C / 40% RH) |
Isolation & Resistance
| Parameter | Value |
|---|---|
| Insulation Resistance | 10 GΩ at 25 °C (40% RH) / 100 MΩ at 40 °C (90% RH) |
Technology
Armature Latching Switch Matrix
Applications
Data Acquisition and Automated Routing
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