Microcontrollers feature precision AFE - Embedded.com

Microcontrollers feature precision AFE

Combining a high-precision analog front end (AFE) and a microcontroller (MCU) on a single chip, Renesas unveiled the RX23E-A Group MCUs, its first solution that measures signals with better than 0.1% precision without calibration. The RX23E-A Group targets applications such as manufacturing and test and measurement where the measurement of high-precision analog signals for temperature, pressure, weight and flow are critical. The RX23E-A Group enables sensor data to be measured accurately and reliably by reducing noise characteristics and temperature drift characteristics to low levels.

RX23E-A MCUs are based on the RXv2 core with operating speeds of 32 MHz, a digital signal processor (DSP), and superlative floating-point unit (FPU) calculations. This enables implementation of adaptive control using temperature data and inverse matrix calculations using 6-axis distortion data.

Features of the MCUs also include AFE precision including offset drift of 10 nV/°C, gain drift of 1 ppm/°C, and 30 nV rms noise, previously only achievable with dedicated A/D converter circuits with high-precision operational amplifier ICs. The solution enables implementation of high-precision sensor measurement, computation, control and communications, all in a single chip. This allows system manufacturers to reduce component count, save space, and simplify system design. It also enables distributed processing with MCUs, accelerating endpoint intelligence.

Samples of the RX23E-A Group of MCUs are currently available with mass production planned for December 2019. They are available in 48-pin QFP (7-mm square) and 40-pin QFP (6-mm square) packages.

>> This article was originally published on our sister site, Electronic Products: “Microcontrollers deliver 0.1% precision without calibration.”

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