PicoScope 4444 — High-resolution Differential USB Oscilloscope
Four-channel differential USB oscilloscope for safe non-ground-referenced measurements, power electronics, motor drives, EV battery stacks, biomedical signals and low-level sensor work. Each channel uses Pico’s intelligent D9 probe interface for voltage or current measurement configuration.
| Model | Input Type | Channels | Bandwidth | Resolution | Memory |
|---|---|---|---|---|---|
| PicoScope 4444 | Fully differential, high impedance | 4 | 20 MHz | 12 / 14-bit flexible | 256 MS |
Key Features
Four Fully Differential Inputs
Measure between two high-impedance points on each channel, instead of measuring everything relative to earth ground.
Common-mode Noise Rejection
Differential inputs help reject noise that appears equally on both input conductors, improving difficult measurements in noisy electrical environments.
Intelligent Probe Interface
Each channel detects compatible D9-connected voltage or current probes and applies the right scaling for the selected measurement setup.
High-voltage and Current Workflows
Configure low-voltage differential probes, 1000 V CAT III voltage probes, and current probes for mains, inverters, motor drives and EV work.
Deep-memory High-resolution Capture
256 MS memory and high vertical resolution support long-duration detailed captures for power, mechanical, biomedical and sensor signals.
USB 3.0 Connected and Powered
The instrument is powered and controlled over USB 3.0, keeping the bench compact while supporting PicoScope and PicoSDK workflows.
Specifications
| Parameter | Unit | Value / Description |
|---|---|---|
| OSCILLOSCOPE | ||
| Input channels | — | 4 fully differential high-impedance inputs |
| Bandwidth | MHz | 20 |
| Resolution | bit | Flexible 12 and 14-bit operation |
| Capture memory | MS | 256 |
| Waveform buffer | segments | 10,000 circular buffer |
| Waveform update rate | wfms/s | Up to 100,000 |
| MEASUREMENT WORKFLOW | ||
| Differential measurement | — | Measures across floating components or test points without referencing either side to ground |
| Common-mode rejection | — | Differential input architecture rejects shared noise on the measurement pair |
| Probe interface | — | Intelligent D9 interface for compatible voltage and current probes |
| High-voltage workflow | — | Probe-dependent measurement up to 1000 V CAT III |
| Current workflow | — | Compatible current probes and clamps for AC/DC or AC current measurement |
| ANALYSIS / CONTROL | ||
| Serial decoding | — | Supported through PicoScope analysis environment |
| Mask and math tools | — | Mask testing, math, filtering and measurements with statistics |
| Host interface | — | USB 3.0 connected and powered |
Applications
Power Electronics
Floating voltage and current measurements in SMPS, inverters, motor drives and mains-quality checks.
Electric Vehicles
Battery-stack and cell-level measurements where different channels may sit at different common-mode voltages.
Biomedical / Sensors
Low-level differential signals where common-mode noise rejection and higher vertical resolution are important.
Automotive
CAN, balanced sensor and actuator measurements without creating unwanted ground references.
Industrial Drives
Three-phase voltage and current investigations with appropriate rated probes and clamps.
Research
Multi-channel differential measurements on bridge sensors, physical experiments and non-ground-referenced circuits.
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