Agilent/Keysight 16065C

The Keysight 16065C is an external DC bias adapter that introduces controlled bias voltage to devices under test during impedance measurements with compatible Keysight impedance analyzers and LCR meters. It extends measurement capability by enabling component and material characterization across various DC bias conditions, delivering stable, regulated bias for applications where bias-dependent behavior is critical to measurement accuracy.

Technical Specifications

• External DC Bias Voltage: ±40 VDC


• Frequency Range: 50 Hz to 1 MHz


• Internal Blocking Capacitor: 100 µF (series-connected between Hcur terminal and DUT)


• Current Limiting Resistor: 2 kΩ (series with DUT on DC bias input)


• External Bias Source Requirement: 20 mA at 40 V


• Operating Temperature: 0 to 55 °C


• Storage Temperature: -40 to +70 °C


• Operating Humidity: Up to 95% relative humidity at 40 °C (non-condensing)


• Storage Humidity: Up to 95% relative humidity at 65 °C (non-condensing)

Key Features

• Four-terminal-pair measurement interface with dedicated test leads for connection to UNKNOWN terminals


• BNC connector for external DC voltage source input


• Direct 4 terminal-pair test fixture attachment capability


• Series blocking capacitor prevents DC bias from flowing back into the measurement instrument


• Series current limiting resistor protects against excessive bias current

Typical Applications The 16065C enables bias-dependent impedance characterization of semiconductors, varactors, capacitors with voltage coefficients, and other components exhibiting bias-sensitive electrical behavior across the 50 Hz to 1 MHz measurement band.

Compatibility & Integration Measurement Instruments: Keysight 4263A/B, 4268A, 4278A LCR meters Compatible Test Fixtures: Keysight 16034E/G/H, 16044A, 16047A/C/D/E, 16048A/B/D/E, 16089A/B/C/D/E Important Limitation: The 16065C cannot be used with applications requiring the instrument's internal bias source. OPEN and SHORT correction procedures per instrument manual are mandatory to minimize measurement error from adapter stray capacitance, residual inductance, and resistance.