Saelig has introduced the Jetperch Joulescope JS320, a third-generation precision DC energy analyzer developed for engineers working on low-power embedded designs. Building on earlier Joulescope models, the JS320 features a redesigned measurement architecture that enhances low-current accuracy, making it ideal for devices that spend most of their time in sleep mode and briefly activate for sensing, processing, communication, or user interaction.
The analyzer is optimized for critical power measurements in battery-operated and low-power electronics, with a focus on offset stability, leakage current, current-range switching performance, and time-domain response. These parameters play a vital role in accurately estimating battery life and improving design decisions. The JS320 can simultaneously measure voltage and current across a wide range—from nanoamps to amps—while its software calculates power, energy, and charge in real time. This enables engineers to assess battery longevity, refine firmware, verify hardware performance, compare operating modes, and determine power supply requirements. Key enhancements include better offset stability, lower leakage current, Enwavify v2 range-switching technology, a 24-bit ADC, expanded digital processing capabilities, and a linear-phase analog signal path. These advancements make the JS320 particularly valuable for BLE devices, IoT products, sensors, remote controls, backscatter RF applications, and energy-harvesting systems where even minor measurement inaccuracies can significantly impact battery-life predictions.
Most multimeters and current meters have a significant voltage drop (called burden voltage or insertion loss) which affects the actual voltage delivered to the device under test. The JS320 has a very low voltage drop of 25mV at 1A, which does not affect the operation of the target device. Joulescope’s extremely fast current range switching maintains this low voltage drop even under rapidly varying current demands.
The JS320 provides reports on cumulative energy and charge consumption, as well as real-time current, voltage, and power. It displays instantaneous voltage, current, power, and energy, like a multimeter. The Multimeter View provides a quick and easy summary of the present state of the device being tested. It can also display waveforms of voltage and current versus time like an oscilloscope. This Oscilloscope View helps identify and troubleshoot dynamic behavior or short events, including inrush current, event handlers, and tasks.
Joulescope combines high-speed sampling and rapid dynamic current range switching to provide accurate and seamless current and energy measurements, even for devices with rapidly varying current consumption. The reliable accuracy of the economical Joulescope allows users to measure the energy consumed by the target device during development, providing rapid knowledge of how changes affect the overall product battery life. Developers can make informed choices to account for battery life during the design phase, eliminating power consumption surprises during final product testing.
Applications include: microprocessor and hardware power profiling and optimization, sleep current optimization, 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, etc.
Made in the USA by Jetperch, the JS320 provides precision power measurements in a portable, handy form factor.
