Features and Specifications

• +/- 1 nanoamp accuracy when measured at +/-20 nA

• 15V voltage range

• 3A current range, continuous (10A pulses)

• 0.5 nA resolution, equivalent to 34-bits of dynamic range

• 300 kHz bandwidth with 2 million samples per second,
  16-bit, simultaneous current and voltage

• Rapid 1 μs switching between shunt resistors for
  seamless dynamic current measurement

• Enwavify technology for consistent, accurate measurements
  through current range changes

• Computes power, energy, and charge

• 4 general-purpose inputs and 2 general-purpose outputs

• 1 BNC trigger configurable for either input or output

• USB 2.0 high-speed host connectivity with modern USB C connector

• Sensor ports electrically isolated from USB

• Host software support for Microsoft Windows, Apple macOS, and Linux

• Python library and scripting provided

• Joulescope host software is open-source on GitHub

Joulescope JS220+: Precision Energy Analyzer

Joulescope's next-generation, affordable, and user-friendly instrument helps you create more energy-efficient products, all within a portable design. The LIMITED EDITION Joulescope JS220+ is an enhanced version of the JS220, designed for superior performance, temperature stability, and ±1 nanoamp accuracy at ±20 nA. It functions the same as the JS220 and offers the same top-tier high-dynamic current range measurement.

A JS220+ enables accuracy for measurement challenges including:

• In-circuit leakage measurement for market-leading low-power ICs

• Capacitor leakage measurement, including super-capacitors

• Charge, energy, and battery life estimation for leading energy-harvesting and extreme low-power systems

While many low-measurement instruments using transimpedance amplifiers can measure down to femtoamps (1e-15 A), they are typically limited to a maximum capacitance of around 10 nF (1e-8 F), which is far below what is needed for in-circuit measurements. The JS220+ remains stable across all capacitances.

The JS220+ boasts a completely revamped analog front end aimed at low-level accuracy and temperature stability. It also features a custom, extremely low-leakage front panel with safety banana jacks, and all PCBs are made with Rogers material to ensure the lowest possible current leakage performance.

Python Library and Scripting:

Want to go beyond the Joulescope UI? Automate a test? Integrate with a larger test setup? The Joulescope software contains several layers that you can use to integrate. The easiest way to get started is with Python. Joulescope's Python package includes the driver and command-line tools. This package allows you to automate and script Joulescope operations or integrate Joulescope into a custom application. Most users will use the graphical user interface provided in the pyjoulescope_ui package. While most of the code is written in Python 3.8+, it also includes some C and Cython for enhanced performance.

Applications Include

• Microprocessor and microcontroller power profiling and optimization

• Hardware power optimization

• Microcontroller and device sleep current optimization

• Hardware and software troubleshooting

• Software characterization and interrupt service routine profiling

• USB inrush and suspend current pre-compliance testing

• General-purpose current, voltage, power, charge, and energy measurement

  
  

JS220 Series

The JS220 Series offers the most affordable and user-friendly precision DC energy analyzers, measuring current and voltage to compute power and energy. The Joulescope JS220 can accurately measure electrical current across ten orders of magnitude, from amps to nanoamps, ensuring precise measurements for modern devices. The LIMITED EDITION Joulescope JS220+ is a variant of the JS220, designed for exceptional performance, temperature stability, and +/- 1 nanoamp accuracy at +/- 20 nA. The JS220+ operates identically to the JS220, providing the same best-in-class high-dynamic current range measurement.

What's in the Box

1. Joulescope JS220+ instrument (with installed safety banana jack front panel)

2. Carrying case

3. 25 cm GPIO cable

4. 5 ft USB cable

5. Quick start guide

   
   

Not shown:

SO 17025:2017 NIST-traceable calibration performed by Tra-Cal,
Allen wrench (for swapping the front panel), and Sticker