The Keysight N6785A is an 80 W Source/Measure Unit (SMU) designed specifically for battery drain analysis in mobile and IoT devices. Operating as a double-wide module within the N6700 modular power system mainframes, this 2-quadrant SMU provides advanced emulation and high-speed, seamless measurement capabilities to accurately profile battery usage.

Specifications

General

ParameterValue
InterfacesVia N6700 series mainframe backplane (mainframe provides USB, LAN/LXI, and GPIB interfaces)
DisplayNone (utilizes the mainframe display or software control)
Product TypeSource/Measure Unit (SMU) Module

Physical

ParameterValue
Power SupplySupplied by the N6700 series mainframe backplane
Operating Temperature0 to 55 °C
Dimensions (W×H×D)70.4 mm x 47.3 mm x 343.4 mm
Weight1.23 kg

Output Ratings

ParameterValue
Number of Channels1
Output Quadrants2-quadrant (source and sink)
Maximum Output Power80 W
Voltage Range 10 to 20 V
Current Range 1 (at 20 V)0 to ±4 A
Voltage Range 20 to 6 V
Current Range 2 (at 6 V)0 to ±8 A

Measurement Specifications

ParameterValue
Measurement Resolution18-bit
Digitizing Rate200 kHz (5 µs interval)
Current Measurement Ranges8 A, 100 mA, 1 mA, 10 µA
Voltage Measurement Ranges20 V, 2 V, 200 mV
Seamless Current AutorangingYes (allows glitchless measurement across all ranges)
Auxiliary DVMYes (for independent voltage measurements)
Auxiliary DVM Voltage Range-20 V to +20 V

Special Features

ParameterValue
Programmable Output ResistanceYes (emulates battery internal resistance)

Physical & System Compatibility

ParameterValue
Mainframe Slots Occupied2 slots (double-wide module)
Compatible MainframesKeysight N6700C, N6701C, N6702C, N6705C (and legacy A/B models)

Environmental Specifications

ParameterValue
Storage Temperature Range-30 to 70 °C

Programming Accuracy

ParameterValue
Voltage Programming Accuracy (20 V Range)0.025% + 1.8 mV
Voltage Programming Accuracy (6 V Range)0.025% + 600 µV
Current Programming Accuracy (8 A & 4 A Ranges)0.04% + 1.5 mA

Measurement Accuracy

ParameterValue
Voltage Measurement Accuracy (20 V Range)0.025% + 1.2 mV
Voltage Measurement Accuracy (6 V Range)0.025% + 350 µV
Current Measurement Accuracy (8 A Range)0.04% + 1.2 mA
Current Measurement Accuracy (100 mA Range)0.025% + 10 µA

Output Noise

ParameterValue
Output Voltage Ripple and Noise (RMS)1.5 mV (20 Hz to 20 MHz)
Output Voltage Ripple and Noise (Peak-to-Peak)15 mV (20 Hz to 20 MHz)
Output Current Ripple and Noise (RMS)2 mA (20 Hz to 20 MHz)

Programming Resolution

ParameterValue
Voltage Programming Resolution (20 V Range)300 µV
Voltage Programming Resolution (6 V Range)100 µV

Transient Response

ParameterValue
Voltage Transient Recovery Time< 35 µs (for a 1.5 A/µs load change)

Auxiliary DVM

ParameterValue
Auxiliary DVM Input Resistance> 10 GOhm

Outputs

ParameterValue
Maximum DC Floating Voltage240 VDC
Remote Sensing4-wire connection supported
Maximum Sense Lead Drop1 V per lead

Protection

ParameterValue
Overvoltage ProtectionProgrammable
Overcurrent ProtectionProgrammable

Technology

Source Measure Unit (SMU)

Applications

Battery Drain Analysis, Mobile Device Testing, IoT Device Testing

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