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
| Parameter | Value |
|---|---|
| Interfaces | Via N6700 series mainframe backplane (mainframe provides USB, LAN/LXI, and GPIB interfaces) |
| Display | None (utilizes the mainframe display or software control) |
| Product Type | Source/Measure Unit (SMU) Module |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Supplied by the N6700 series mainframe backplane |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 70.4 mm x 47.3 mm x 343.4 mm |
| Weight | 1.23 kg |
Output Ratings
| Parameter | Value |
|---|---|
| Number of Channels | 1 |
| Output Quadrants | 2-quadrant (source and sink) |
| Maximum Output Power | 80 W |
| Voltage Range 1 | 0 to 20 V |
| Current Range 1 (at 20 V) | 0 to ±4 A |
| Voltage Range 2 | 0 to 6 V |
| Current Range 2 (at 6 V) | 0 to ±8 A |
Measurement Specifications
| Parameter | Value |
|---|---|
| Measurement Resolution | 18-bit |
| Digitizing Rate | 200 kHz (5 µs interval) |
| Current Measurement Ranges | 8 A, 100 mA, 1 mA, 10 µA |
| Voltage Measurement Ranges | 20 V, 2 V, 200 mV |
| Seamless Current Autoranging | Yes (allows glitchless measurement across all ranges) |
| Auxiliary DVM | Yes (for independent voltage measurements) |
| Auxiliary DVM Voltage Range | -20 V to +20 V |
Special Features
| Parameter | Value |
|---|---|
| Programmable Output Resistance | Yes (emulates battery internal resistance) |
Physical & System Compatibility
| Parameter | Value |
|---|---|
| Mainframe Slots Occupied | 2 slots (double-wide module) |
| Compatible Mainframes | Keysight N6700C, N6701C, N6702C, N6705C (and legacy A/B models) |
Environmental Specifications
| Parameter | Value |
|---|---|
| Storage Temperature Range | -30 to 70 °C |
Programming Accuracy
| Parameter | Value |
|---|---|
| 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
| Parameter | Value |
|---|---|
| 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
| Parameter | Value |
|---|---|
| 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
| Parameter | Value |
|---|---|
| Voltage Programming Resolution (20 V Range) | 300 µV |
| Voltage Programming Resolution (6 V Range) | 100 µV |
Transient Response
| Parameter | Value |
|---|---|
| Voltage Transient Recovery Time | < 35 µs (for a 1.5 A/µs load change) |
Auxiliary DVM
| Parameter | Value |
|---|---|
| Auxiliary DVM Input Resistance | > 10 GOhm |
Outputs
| Parameter | Value |
|---|---|
| Maximum DC Floating Voltage | 240 VDC |
| Remote Sensing | 4-wire connection supported |
| Maximum Sense Lead Drop | 1 V per lead |
Protection
| Parameter | Value |
|---|---|
| Overvoltage Protection | Programmable |
| Overcurrent Protection | Programmable |
Technology
Source Measure Unit (SMU)
Applications
Battery Drain Analysis, Mobile Device Testing, IoT Device Testing