Keithley 3723

The Keithley 3723 is a dual-bank, high-speed multiplexer card for the Series 3700A mainframe, delivering configurable switching across 30 to 120 channels. Two independent 1×30 two-pole multiplexer banks interconnect via mainframe relays to form 1×60 two-pole, 1×30 four-pole, or 1×120 single-pole configurations. High-speed reed relays with actuation times below 0.5 ms enable scanning rates exceeding 800 channels/s, making the 3723 ideal for multi-channel I-V characterization, parametric testing, and complex data acquisition. The card maintains contact potential of ±6 μV (differential) and ±12 μV (single-ended) while supporting 1-, 2-, and 4-wire measurement topologies. Rated for switching up to 200 V DC/RMS at 1 A with 1.25 A carry capacity, it delivers 20 MHz bandwidth and 10^10 Ω isolation across all configurations.

## Technical Specifications

• **Multiplexer Banks:** Two independent 1×30 two-pole banks; interconnectable via relays to 1×60 two-pole or 1×120 single-pole
• **Relay Type:** High-speed reed relays, 10^9 operations at no load, 1×10^7 operations at 100 V/10 mA
• **Electrical:** 20 MHz bandwidth; 200 V DC/RMS switching; 1 A switch, 1.25 A carry; 15 W max power; 300 V DC/RMS common mode; 8×10^7 volt-hertz limit
• **Performance:** >800 channels/s scan rate; <1.5 Ω channel resistance (1×30 2-pole); <2.0 Ω (1×60 1-pole with 3723-ST); ±6 μV differential contact potential; ±12 μV single-ended; <250 pA offset current
• **Isolation:** 10^10 Ω differential (260 pF); 10^10 Ω bank-bank (75 pF); 10^10 Ω common mode (280 pF); crosstalk <-55 dB @ 300 kHz, <-50 dB @ 1 MHz, 120 channels
• Long relay life with predictable contact degradation
• Low thermal offset for precision low-level switching
• Support for differential and single-ended measurements

## Typical Applications

• Multi-channel I-V characterization with Series 2600B SourceMeter instruments
• High-throughput parametric device testing
• Automated production test and burn-in
• Data acquisition on large channel-count test systems

## Compatibility & Integration

The 3723 integrates into the Keithley Series 3700A mainframe via the analog backplane, enabling mixed-module configurations and synchronized scanning across multiple card types.