The Keithley 3732 is an ultra-high-density reed matrix card designed for the Keithley 3706 and 3706A system switch/multimeters, offering 448 single-pole crosspoints. It can be configured dynamically in multiple matrix topologies, including quad 4x28, dual 4x56, single 4x112, dual 8x28, or single 8x56. Its ultra-fast reed relays provide actuation times under 0.6 ms, making it ideal for high-speed automated test applications where throughput is critical.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Two 78-pin male D-sub connectors |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered via mainframe backplane |
| Operating Temperature | 0°C to 50°C |
| Dimensions (W×H×D) | 33 mm x 211 mm x 322 mm |
Topology and Configuration
| Parameter | Value |
|---|---|
| Switch Type | Reed Relay |
| Number of Crosspoints | 448 |
| Supported Topologies | Quad 4x28 (1-pole), Dual 4x56 (1-pole), Single 4x112 (1-pole), Dual 8x28 (1-pole), Single 8x56 (1-pole) |
| Number of Poles | 1-pole |
| Compatible Mainframes | Keithley 3706, 3706A |
DC Electrical Specifications
| Parameter | Value |
|---|---|
| Maximum Switching Voltage | 200 V DC or peak AC |
| Maximum Switching Current | 0.5 A |
| Maximum Carry Current | 1.2 A |
| Maximum Switching Power | 10 W / 10 VA |
| Initial Path Resistance | < 1.5 Ω |
| Contact Potential (Thermal EMF) | < 50 µV |
| Isolation Resistance (Path-to-Path) | > 10^9 Ω |
| Isolation Resistance (Path-to-Chassis) | > 10^9 Ω |
AC and RF Electrical Specifications
| Parameter | Value |
|---|---|
| Bandwidth (-3 dB) | 30 MHz (typical, 50 Ω system) |
Timing and Switching Dynamics
| Parameter | Value |
|---|---|
| Actuate Time (Relay Close) | < 0.6 ms |
| Release Time (Relay Open) | < 0.6 ms |
Relay Life and Reliability
| Parameter | Value |
|---|---|
| Mechanical Lifetime (No-Load) | 10^9 operations |
| Electrical Lifetime (Rated-Load) | 10^5 operations (at 200V, 0.5A, 10W) |
| Electrical Lifetime (Light-Load) | 10^8 operations (at 10V, 10mA) |
Power and Environmental Specifications
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40°C to 70°C |
| Operating Humidity Range | Up to 80% R.H. at 35°C (non-condensing) |
Connectivity
| Parameter | Value |
|---|---|
| Connector Type | Two 78-pin male D-sub connectors |
| Backplane Connection | Internal connection to 3706/3706A analog backplane via backplane relays |
Performance
| Parameter | Value |
|---|---|
| Maximum Common Mode Voltage | 300 V DC or peak AC (any terminal to chassis) |
Technology
Reed Relay Matrix
Applications
Automated switch systems, high-speed multi-channel testing, and automated test equipment (ATE)
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