OTII-ARC-001

Otii Arc Product Specification Otii Arc is the ultimate tool for energy optimization of battery-driven devices. Made for hardware, firmware and software developers. Otii Arc Otii Arc is a small, portable power supply, a current and voltage measurement unit and a dataacquisition module. It is powered by USB and optionally by using an external DC-adapter. See technical specification below. Otii Arc is shipped with a USB A to uB cable. Otii desktop application Otii Arc comes with free Otii basic software with possibility to upgrade. The Otii application is a powerful and easy-to-use desktop application for Windows, Ubuntu & macOS. Download the desktop application at https://www.qoitech.com/download Hardware spec in short Sample rate • 4ksps for main current channel • 1ksps for all other channels (main voltage, adc current, adc voltage, sense+, sense-, UART RX, GPI1, GPI2) Accuracy current measurement • +-(0,1% + 50nA) accuracy below 19mA and +-(0.1%+150uA) above 19.5mA • 5nA current measurement resolution • 24bit ADC with automatic switching between ranges Power supply • 0.5 - 5.0V • USB only (0.5 - 3.75V in auto range mode, 0.5 - 4.2V in high range mode) • DC plug supply (0.5 - 4.55V in auto range mode, 0.5 - 5.0V in high range mode) • 0-5A (depends on available current from USB or DC plug) Digital interface • Digital IO voltage 1.2 - 5.0V • Max 10mA source and sink in total Software features in short • • • • • • • • • • • Basic measurements (current, voltage, power) GPI measurements ADC (sub-system) measurements Basic statistics Check statistics of the accumulated energy consumption while recording Select a part of recording for analysis, while recording continues in the background Name recordings Export data to CSV Save/load projects Unlimited undo/redo Offset calibration Hardware specifications Min Unit Max Operating Environment Operating environment 15 °C / 60 °F 30 °C / 86 °F Output voltage (auto range) 0.5 V 3.75 V Output voltage (locked to high current range) 0.5 V 4.2 V USB Power Supply(1) Output voltage setting resolution 1 mV Output current up to 1A (1) External 7.5 – 9 V Power Supply(2) Output voltage (auto range) 0.5 V 4.55 V Output voltage (locked to high current range) 0.5 V 5.0 V Output voltage setting resolution 1 mV Output current, max continuous(3) 2.5 A Output current, max peak(3) 5A Programmable Current Sink (requires an Otii Battery Toolbox license) Sink current 0A Sink current, resolution 2.5 A 39 µA Sink voltage, USB power supply 0.85 V(4) 4.2 V Sink voltage, external power supply 0.85 V(4) 5V Current measurement Accuracy ±(0.1% + 50 nA)(5) Sample Rate in ±19 mA range 4 ksps Sample Rate in ±2.7A range 1 ksps Sample Rate in ±5.0 A range 1 ksps Analog bandwidth (3 dB) 400 Hz Voltage measurement Total accuracy ±(0.1% + 1.5 mV) Sample Rate 1 ksps UART Bitrate 110 bps 5.25 Mbps Digital I/O; GPO1, GPO2, TX(6) VIO Expansion port operating voltage 1.2 V VIO(7) VIL Low-level input voltage VIH High-level input voltage 5 V(8) VIO * 0.2 V VIO * 0.8 V Imax Maximum sink/source current 10 mA ADC, Differential Analog/Digital Conversion pins ADC-, ADC+ (9) Voltage input Shunt voltage range 0V 5V -81.9175 mV 81.2 mV Resolution 2.5 µV Accuracy ±(0.1% + 10 µV) Input impedance 220 kΩ ADC, Single Ended Analog/Digital Conversion pin ADC+ Voltage input 0V 5V Resolution 1.25 mV Accuracy ±(0.1% + 7.5 mV) Input impedance 830 kΩ SENSE, pins SENSE- and SENSE+ Voltage input 0V 5V Resolution 1.5 mV Accuracy 1% Input impedance 1 MΩ USB power capacity and reliability in laptops and desktops greatly depend on host USB port/cable design. See list of recommended external power supplies and powered USB hubs at our FAQ (3) Depends on chosen power supply. Otii Arc will monitor internal temperature and cut off if temperature limit is reached. (4) Sink voltage can go below this specification if locked to high range. It is possible to go down to 0.5 V if the sink current is below 1.9 A. For currents below 19 mA, the measurement will have a lot more noise when locked to high range than in auto range. (5) Up to 19 mA current in auto range, for higher currents, the accuracy is ±(0.1 % + 150 µA). Average > 1 s. (6) See Nexperia SN74LVC8T245 for details. (7) Expansion Port Digital voltage level is set by user in Otii SW. (8) Maximum voltage will depend on your USB power supply and USB cable. (9) See TI INA226 for details. (1) (2) Qoitech is a Swedish company bringing to market the most effective developer tools for visualisation, measurement and analysis of energy consumption of battery driven products. By enabling ease of use, our toolboxes help developers, throughout the stack, to develop for longer battery life, shorter development time and increased product quality. Learn more at www.qoitech.com. Copyright © 2022 Qoitech. All rights reserved.