SY7M007A

• Capacitively coupled serial interface to a compatible Silergy metrology processor, e.g., SY7T625A,
• SY7T622A, or SY7x2xx SoC
• Capable of ±0.1% Wh accuracy over 5,000:1 current range
• Dual delta-sigma ADCs with pin-selectable gains and 4.28kHz effective sample rate
• On-chip digital temperature sensor
• Built-in 5V-to-3V LDO
• Compact 3x3mm 16-pin TQFN package

The SY7M007A is the sensor-side device of an isolated metering chipset for single-phase and poly-phase electricity metering applications. It can be combined with a compatible Silergy host and other SY7M007A devices to form a fully isolated meter based on shunt sensors.

The SY7M007A provides two analog inputs interfacing to voltage and current sensors. Scaled voltages from the sensors are digitized by the SY7M007A using high-resolution delta-sigma ADCs with pin-selectable gains. The device continuously sends trim data, silicon version, voltage and current measurements, plus device temperature information to a compatible Silergy host processor.

Isolation of the SY7M007A from the rest of the chipset is accomplished using capacitive coupling and can be implemented with discrete components or with PCB capacitors. The SY7M007A is pin compatible with the SY7M007. Host code for temperature sensing and temperature compensation of the metrology must be adapted when transitioning from the SY7M007 to the SY7M007A.

Silergy does not recommend mixing the SY7M007A with the SY7M007 in one meter.

The SY7M007A may be used with the SY7T625A or SY7T622A Metrology Processors which provide four remote channels, or with Silergy’s ARM-based metering SoCs such as the SY7x2xx (up to three remote channels).