The Keysight N6781A is a 2-quadrant Source/Measure Unit (SMU) engineered for precision sourcing and measurement in applications requiring simultaneous voltage and current control with high accuracy. It sources positive and negative voltage and current while measuring both parameters across multiple ranges, making it ideal for battery drain analysis and dynamic device characterization. The module integrates into the N6700 or N6705 platform as a single-slot instrument, enabling multi-channel test systems with synchronized measurements.
Technical Specifications
Output Ratings:
• Voltage: up to 20 V
• Current: ±3 A
• Power: 20 W
Programming Accuracy (23°C ± 5°C, post 30-minute warm-up):
• Voltage (20 V range): 0.025% + 1.8 mV
• Voltage (6 V range): 0.025% + 600 µV
• Current (3 A and 1 A ranges): 0.04% + 300 µA
• Current (300 mA range): 0.03% + 150 µA
Measurement Accuracy (23°C ± 5°C):
• Voltage (20 V range): 0.025% + 1.2 mV
• Current (3 A range): 0.03% + 250 µA
• Current (100 mA range): 0.025% + 10 µA
• Current (10 µA range): 0.025% + 8 nA
Transient Response:
• Less than 30 mV droop for 0.15 A/µs current transients
Digitization:
• Sample rates: 5.12 µs/sample (single parameter) and 10.24 µs/sample (dual parameter)
– Key Features
• 2-quadrant operation functions as voltage or current source, or as CV/CC electronic load
• Automatic measurement ranging across four current ranges with instantaneous glitch-free transitions; when paired with 18-bit digitizer, delivers 28-bit effective vertical resolution
• Fast DC modulation up to 100 kHz for waveform generation
• Programmable output resistance for battery internal resistance emulation
• Auxiliary Digital Voltmeter for independent voltage measurement
• Glitch-free sourcing and measurement range changes
– Typical Applications
Battery drain characterization, device quiescent current measurement, multi-mode current profiling (off, sleep, standby, transmit states), and dynamic load emulation.
– Compatibility & Integration
Designed for integration with Keysight N6700 Low-Profile Modular Power Systems or N6705 DC Power Analyzers.
