Keithley 213

The Keithley 213 Quad Voltage Source is a precision four-channel instrument for independent voltage sourcing in test and measurement applications. Each channel delivers programmable outputs up to ±10 V at 10 mA, with resolution as fine as 250 µV on the ±1 V range. The unit supports Direct, Indirect, Stepped, and Waveform control modes, stores up to 8192 voltage values in non-volatile RAM for waveform generation at 1 ms per point intervals, and integrates with IEEE-488 test systems via GPIB. Eight TTL-compatible digital I/O lines (inputs and outputs) enable external triggering and system control.

– Technical Specifications

Voltage Output
• Four independent, stackable channels
• Programmable ranges: ±1 V, ±5 V, ±10 V
• Output current: up to 10 mA per channel
• Resolution: 250 µV (±1 V), 1.25 mV (±5 V), 2.5 mV (±10 V)
• Output impedance: <1 mΩ typical
• Wideband noise (p-p): 150 µV + 50 ppm (0.1 Hz to 300 Hz); 5 mV (0.1 Hz to 300 kHz local sensing); 8 mV (0.1 to 20 MHz)

Digital I/O
• 8 TTL-compatible level-sensitive inputs; <1.5 TTL load per line
• 8 TTL-compatible outputs with open collector drive, 100 mA capability; can drive two TTL loads
• DB25 female connector; all lines referenced to digital ground (pin 20)

Memory & Waveform Generation
• 8192-location buffer shared across all ports
• Non-volatile RAM preserves waveform data through power cycles
• Waveform generation speed: 1 ms per point

Isolation & Common-Mode
• 500 V or 105 V·Hz isolation between channels (whichever is less)
• Maximum common-mode voltage: 500 V peak (output LO to chassis ground)

Electrical
• Internally switch-selectable: 90–125 V AC or 180–250 V AC input
• Frequency: 50–60 Hz
• Power consumption: 70 VA maximum

Physical
• Dimensions: 425 mm × 45 mm × 309 mm (16.75 in × 1.75 in × 12.17 in)
• Weight: 3.52 kg (7.75 lb)
• Operating temperature: 0 °C to 50 °C; humidity: 0% to 70% relative
• Rackmount ears included

– Key Features

• Auto-calibration support
• All functions programmable via IEEE-488
• Trigger input/output via BNC connectors
• Analog output on 12-pin quick disconnect

– Typical Applications

Semiconductor characterization, bias sourcing for SMU systems, and multi-channel precision voltage applications requiring independent channel control and waveform generation.

– Compatibility & Integration

IEEE-488-1978 GPIB interface for seamless integration into automated test systems.