Convertor SoC is single-chip metering solution

The XE88LC02 ZoomingADC is billed as the world's most versatile single-chip acquisition chain.

The ZoomingADC is billed as the world's most versatile single-chip acquisition chain.

Ultra-low-power miniature solutions based on the XE88LC02 from Xemics need a minimal number of external parts, lowering bill of material costs.

The ZoomingADC (programmable gain/offset amplifier, high resolution ADC) has four differential or seven pseudodifferential inputs.

It can apply a gain of 1000 to the sensing element's signal while rejecting its offset, and then convert the resulting signal with 16bit resolution.

The XE88LC02 can be directly connected to any type of resistive sensor, and benefits from simplified calibration.

Embedded processing ensures that this low power chip can do it all.

This eliminates size and current consumption problems for manufacturers.

"With the XE88LC02, a single chip can be the whole electronics of a medical monitor or of an industrial weight scale".

"The advanced LCD driver with voltage regulation ensures the display is easy to read, even in low light and under difficult power supply conditions", said Michel Chevroulet, Product Line Manager at Xemics.

Integrated MTP Flash memory with 100 years retention at 55C, UART, SPI, numerous I/Os, 120 segment LCD driver and an embedded RISC CPU combine to facilitate a large variety of filtering and data processing functions.

Thanks to its large instruction word, the CPU core executes any instruction in one single clock cycle.

Large instruction word is a concept where the instructions are coded on large words (22bit in this case) instead of 8 or 16bit.

It has the advantage of putting the instruction itself (move or call or add etc) and the address of the source and of the destination, on a single instruction word that is loaded in a single clock cycle.

This programmable 16 + 10bit data acquisition system-on-chip uses less than 2uA in real time clock mode and a typical 300uA/MIPS in sustained computing mode.

All peripherals have sleep modes.

The ZoomingADC requires only 200uA for a 12bit 4kHz or a 16bit 1kHz data conversion.

The SoC operates at 2.4 to 5.5V.

Examples of applications that would benefit from the XE88LC02 include water, gas and heat meters, vital sign monitoring and industrial sensors.

The XE88LC02 programmable version is available from $5 in large volumes in LQFP100, and from $2.90 in bare die for the ROM version.

Software examples and design tools are available from the Xemics website.

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