Communications Power

Digital Power Monitors target Telecom, Industrial and Consumer Systems

Intersil Corporation has added the ISL2802x family of digital power monitors capable of supporting a wide common mode input voltage range of 0V to 60V. The ISL2802x family is comprised of three devices offering a range of capability including full featured bi-directional, high-side and low-side digital current sense and voltage monitors with a serial interface with a high level of integration. Precision measurements are enabled by an integrated 16-bit ADC. Available in a tiny solution footprint and with a wide specified temperature range, the ISL2802x digital power monitor family is designed for use in telecom, industrial and consumer applications.

The ISL2802x family consists of the three unique products. The ISL28023 is a full featured PMBus compatible digital power monitor that integrates the analog comparators, a voltage regulator, a DAC and a low voltage auxiliary channel in a single chip. The ISL28025 is a high precision digital power monitor with integrated analog comparators and an integrated voltage regulator. The integrated analog comparators for the ISL28023/5 allow for continuous monitoring of the inputs. This results in a very fast response time (500nS) enabling real-time alerts for rapid system shut off if necessary. The ISL28022 is a highly efficient digital power monitor ideal for cost constrained applications.

The ISL2802x family delivers high-accuracy measurements through an integrated 16-bit native resolution sigma-delta ADC (gain error = ± 0.05% Typ) in a wide input common mode voltage range (0Vto 60V) providing designers with a high level of safety margin that is often necessary in wired, wireless and data infrastructure applications. In addition, the wide specified temperature range from -40 to 125 degrees C provides greater design flexibility.

"We've taken the best of our current sense amplifier technology and augmented it with digital power monitoring to deliver a robust and highly accurate, but simple to use family of digital power monitors," said Philip Chesley, vice president of Precision Products for Intersil. "Customers get all of the benefits of advanced features while simplifying their design efforts."

Key features and specifications include: Monitors supply voltages up to 60V; Digital output via serial interface that is I2C and SMBus and PMBus compatible; I2C operates down to 1.2V; Operating voltages from 3V to 5.5V and consuming an average current of just 800µA; User defined threshold alerts (OV,OC,UV); Integrated 8-bit voltage output margin DAC; Internal 3.3V voltage regulator; Auxiliary channel for monitoring current and voltage on additional channels; Auxiliary channel can be configured as an external temperature sensor with an addition of a diode; Real-time alerts (500ns response time); and Internal temperature sensor with average accuracy of +1C.

The ISL2802x family is available now. Pricing for the ISL2802x devices starts at $0.95 USD in 1k quantities. The ISL28023 full-featured digital power monitor is offered in a 24 lead 4x4mm QFN package. The ISL28022 digital power monitor for cost sensitive applications is offered in a 16 lead QFN or 10 lead MSOP, and the compact ISL28025 for portable and space-limited applications is offered in a 16 ball WLCP.

Intersil Corporation
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