Keithley Instruments, Inc. Switch Card 3761

The 3761 is a switch card from Keithley. Additional Features: Channels Per Card: 10 Contact Configuration: Form A. Signal LO is common for all 10 channels and output. When open, signal HI is shorted to signal LO in current mode. When open, signal HI is high impedance in voltage mode. Connector Type: SMA Relay Drive Current: 16 mA/relay typical Relay drive scheme: Direct Maximum Signal Level: 30 V, 100 mA peak (resistive load) Contact Life: >10λ6 closures at maximum signal levels; >10λ7 closures cold switching or at low signal levels Contact Resistance: <1 ω Contact Potential: <200 µV Offset Current: <1 pA (<30 fA typical) 3dB Bandwidth: 1 MHz typical Warm up: One hour to rated accuracies Actuation Time: <1 ms, exclusive of mainframe Channel Isolation: >10λ14 ω, <50 pF Common Mode Isolation: >10λ9 ω, <150 pF Common Mode Voltage: <30 V maximum Voltage coefficient of leakage (voltage mode): <100 fA per volt (typical) Operating: 0 °C to 50 °C (32 °F to 122 °F), 70% relative humidity up to 35 °C (95 °F); derate 3% relative humidity per °C, 35 °C to 50 °C, noncondensing Storage: −25 °C to 65 °C (-13 °F to 149 °F) Altitude: 0 to 2000 m (0 to 6562 feet) above sea level Pollution degree: 2 Dimensions: 25.40 mm high x 166.12 mm wide x 263.40 mm long (1.00 in. x 6.54 in. x 10.37 in.) Safety: NRTL listed to UL61010-1 and CAN/CSA C22.2 NO. 61010-1-12; UL 61010-2-030 and CAN/CSA-22.2 NO.61010-2-030-12. Conforms with European Union Low Voltage Directive EMC: Conforms to European Union EMC Directive Available Accessories 3761-BNC-SMA: SMA to BNC Cable XXX Low Noise Male to Male SMA Cable 4801: Low Noise Male to Male BNC Cable 4802-10: Low Noise BNC to Unterminated Cable, 10 ft. 4803: Low Noise BNC Cable kit Available Services 3761-3Y-EW 1-year factory warranty extended to 3 years from date of shipment 3761-5Y-EW 1-year factory warranty extended to 5 years from date of shipment The Keithley 3761 provides quality low-current switching at an affordable price. The offset current error generated is specified <1pA, with typical performance at <30fA. When used with a voltage source and an electrometer or picoammeter, this card can easily automate insulation resistance tests, reverse leakage tests on semiconductor junctions, or gate leakage tests on FETs. The 3761 features both current and voltage modes. In current mode, the current path is maintained even when the channel is open. This eliminates cable charging time between measurements. In voltage mode, the input is broken and is high impedance. Input connectors are SMA for shielding of the sensitive measurements. An SMA male to BNC male cable (3761-BNC-SMA) is available for compatibility with existing 7158 configurations and with Keithley accessory cables such as the 4801 and 4803. The 3761 does not connect to the 6 common buses on the 3706A backplane, but two outputs are provided to allow for chaining several scanner cards to one measurement instrument, allowing up to 60 channels, while an isolation relay in the output HI minimizes interaction between cards.