Metrology processor comes in a 5x5mm 32-pin QFN package

3rd August 2020
Mick Elliott

New Yorker Electronics is now distributing the Silergy Technology SY7625 Isolated Metrology Processor for Electricity Metering Applications.

The SY7T625 is the host side device of an isolated metering chipset for single-phase and poly-phase electricity metering applications.

Featuring Silergy’s proprietary Teridian power measurement technology, it can be combined with up to four analogue front end (AFE) devices are supported, each utilising an independent, robust capacitive-coupled digital interface.

Each AFE supports two ADC channels (voltage and current) to form an accurate and fully isolated shunt-based meter.

The device functions as a completely autonomous metrology processor. A set of pre-processed metrology outputs can be obtained by the host by reading registers that are accessible though the SPI interface.

Likewise, system parameters, such as the desired meter constant (Kh), calibration coefficients, sag threshold, and other parameters into the RAM of the SY7T625 by the host.

A powerful 24-bit Compute Engine and math accelerators implement the core requirements of high accuracy metering. Code images that cover most requirements of revenue metering are provided by Silergy.

These images can be pre-loaded into the flash memory of the SY7T625 by ordering option, programmed at production, and can be updated in the field, if necessary.

The flash memory is also used to store calibration coefficients generated during meter calibration and configuration.

A sophisticated onboard clock management system provides an internal clock source and automatically accesses an optional external crystal if the highest accuracy timing is desired. An integrated hardware Watchdog Timer (WDT) is also included.

As a franchise distributor for Silergy, New Yorker Electronics supplies its full line of Single Output Step Up/Step Down Regulators, Dual Output Regulators, Power Management ICs, LED Backlight Regulators, Controller ICs, LED Lighting Drivers, LDO Regulators, Protection Switches, TVS/Surges, EMIs, Electricity Metering ICs and Embedded Measurement ICs.

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