Overview
Description
The ISL28022 is a bidirectional high-side and low-side digital current sense and voltage monitor with serial interface. The device monitors current and voltage and provides the results digitally along with calculated power.
It provides tight accuracy of less than 0.3% for both voltage and current monitoring over the entire input range. The digital power monitor has configurable fault thresholds and measurable ADC gain ranges.
It also handles common-mode input voltage ranging from 0V to 60V. The wide range permits the device to handle telecom, automotive and industrial applications with minimal external circuitry. Both high- and low-side ground sensing applications are easily handled with the flexible architecture.
The ISL28022 consumes an average current of just 700μA and is available in a 10 Ld MSOP package. The ISL28022 is also offered in a space-saving 16 Ld QFN package. The part operates across the extended temperature range from -40°C to +125°C
Features
- Bus voltage sense range: 0V to 60V
- 16-bit ΣΔADC monitors current and voltage
- Voltage measuring error: <0.3%
- Current measuring error: <0.3%
- Handles negative system voltage
- Overvoltage/undervoltage and current fault monitoring
- I2C/SMBus interface
- Wide VCC range: 3V to 5.5V
- ESD (HBM): 8kV
- Supports high speed I2C: 3.4MHz
Comparison
Applications
Design & Development
Software & Tools
Boards & Kits
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
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ISL28022 Current Sense error
Dear Forum: I have built a power subsystem using the ISL28022 digital power monitor. I can read the bus voltage very accurately but I am seeing a scale error in the current sense value of about +7%. My sense resistor tolerance is 1%, so I expected no worse than 1 ...
Jul 11, 2024 -
I2C: Using SSP with Renesas ISL28022 power monitor
We are trying to measure power draw using the Renesas/Intersil ISL28022 via I2C communication. Using SSP 1.3.2 (locked in for now) on S5D9.The protocol is fairly simple: write 2 bytes of configuration data, then issue read to receive 2 bytes of measured data. These are ...
Sep 6, 2019 -
ISL28022 Negative system voltage and I2C communication
I would like to use your ISL28022 to measure the current and voltage of a negative -8V supply. The datasheet indicated that this can be done by connected the GND pin to the most negative supply. How does this affect the I2C communications, given that the ground reference is a ...
Feb 13, 2025
FAQs
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What is the proper input voltage sequence for the ISL28022?
Question:The ISL28022 has a VCC pin for the part's internal logic and VBUS, VINP and VINM pins for target measurement. Is it OK to apply voltage on VBUS, VINP and VINM pins before voltage is applied on VCC? Will this sequence potentially damage the part? Answer:There is ...
Jan 1, 1970 -
What should we do with the VINP and VINM connections if we do not want to use the ISL28022 for current sensing?
Question:What should we do with the VINP and VINM connections if we want to use the ISL28022 as a voltage monitor only, and not for current sensing? Answer:If you don't want to use it for current sensing, tie the VINP and VINM inputs to a low impedance ...
Jan 1, 1970