Keithley 7012C

The Keithley 7012C is a 4×10 matrix switching card engineered for signal routing within Keithley 7001 and 7002 switch mainframes. Built around a 2-pole Form A (Hi, Lo) contact configuration, this card delivers precision switching for sensitive measurement environments while minimizing signal degradation and crosstalk. The card connects via a 96-pin male Euro card connector and supports DC signals up to 110V at 1A (30VA resistive load) and AC signals up to 125V RMS or 175V peak at 1A (60VA resistive load). With contact potential below 1 µV per pair and channel resistance under 1 Ω per conductor, the 7012C maintains signal integrity across demanding applications. Isolation exceeds 10⁹ Ω across all paths, while crosstalk performance reaches -40 dB at 1 MHz with a 50 Ω load. ## Technical Specifications • **Matrix Configuration:** 4 rows × 10 columns
• **Contact Configuration:** 2-pole Form A (Hi, Lo)
• **Connector:** 96-pin male Euro card
• **DC Signal Rating:** 110V between any two pins, 1A switched, 30VA (resistive load)
• **AC Signal Rating:** 125V RMS or 175V peak between any two pins, 1A switched, 60VA (resistive load)
• **Common Mode Voltage:** 175V peak to chassis
• **Channel Resistance:** <1 Ω per conductor
• **Contact Potential:** <1 µV per contact pair; <3 µV per single contact
• **Offset Current:** 10⁹ Ω, 10⁹ Ω, 10⁹ Ω, <400 pF
• **Crosstalk (1 MHz, 50 Ω load):** <-40 dB
• **Insertion Loss:** <0.1 dB below 1 MHz; <3 dB below 2 MHz (50 Ω source and load)
• **Relay Drive Current:** 16 mA per relay
• **Contact Life:** 10⁸ closures (cold switching); 10⁵ closures (at maximum signal levels) ## Key Features • Flexible matrix routing with independent row isolation via jumper removal
• Low contact potential ensures accurate low-level signal measurements
• Rapid 3 ms actuation supports dynamic test sequences
• Wide signal compatibility spanning DC, audio, and low-frequency AC ## Typical Applications • Precision data acquisition and measurement multiplexing
• Low-level analog signal switching
• Automated test and production characterization
• Mixed-signal DC and AC circuit validation ## Compatibility & Integration The 7012C operates within Keithley 7001 and 7002 switch mainframes and integrates with the 7011 multiplexer card for expanded row-switching capabilities. Rows connect to the analog backplane of the host mainframe with independent isolation control.