The D8331 series of ultra low power mixed-signal processors consist of several devices
featuring different sets of peripherals targeted for energy meter applications. They integrate
analog front end and fixed function DSP solution with an enhanced 8052 MCU core, RTC
and LCD driver in a single part. The measurement core includes active, reactive, apparent
energy calculations, voltage, current RMS, and frequency measurements. This information
can be used as energy billing and any necessary application. Also included is a built-in
16-bit timer, LCD segment drive capability and hardware multiplier.

The D8331 integrates three PGAs with gain settings from 1x to 32x. Three 24-bit sigma-deltas A/D converters guarantee precision in captured data and enough needed resolution.

The microprocessor functionality includes a single-cycle 8052 core, a real-time clock, UART, and an SPI, I2C and JTAG interface. It reduces the program memory size requirement and makes it easy to integrate complicated designs. The programming is very easy and supports multiple ways. (SPI or JTAG) No external voltage is needed for programming.

Features

● Wide supply voltage range: 2.4V to 3.6V
● Ultralow power consumption
- Normal mode:
Total: 2.2mA @ 3V
- Sleep Mode: 3μA
- RTC only: 1.1μA
● Multi mode power saving function
● Internal switch between regulated and battery inputs
● Compatible with CTs, resistive shunts and Rogowski Coil sensors
● Wake-up from standby mode in less than 5μs
● Operation temperature range: -40℃ to +80℃

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