The ADuC831 is a fully integrated 247 kSPS data acquisition system incorporating a high performance self-calibrating multi-channel 12-bit ADC, dual 12-bit DACs, and programmable 8-bit MCU on a single chip. The microcontroller core is an 8052, and therefore 8051-instruction-set compatible with 12 core clock periods per machine cycle. 62 kBytes of nonvolatile Flash/EE program memory are provided on-chip. Four kBytes of nonvolatile Flash/EE data memory, 256 bytes RAM and 2 kBytes of extended RAM are also integrated on-chip. The ADuC831 also incorporates additional analog functionality with two 12-bit DACs, power supply monitor, and a band gap reference. On-chip digital peripherals include two 16-bit Σ-∆ DACs, dual output 16-bit PWM, watchdog timer, time interval counter, three timers/counters, Timer 3 for baud rate generation and serial I/O ports (I2C, SPI and UART). On-chip factory firmware supports in-circuit serial download and debug modes (via UART), as well as single-pin emulation mode via the EA pin. The ADuC831 is supported by QuickStart™ and QuickStart Plus development systems featuring low cost software and hardware development tools. The part is specified for 3 V and 5 V operation over the extended industrial temperature range, and is available in a 52-lead plastic quad flatpack package and in a 56-lead chip scale package. Applications * Optical networking—laser power control * Base station systems * Precision instrumentation, smart sensors * Transient capture systems * DAS and communications systems * ANALOG I/O * 8-channel, 247 kSPS 12-bit ADC DC performance: ±1 LSB INL AC performance: 71 dB SNR * DMA controller for high speed ADC-to-RAM capture * 2 12-Bit (monotonic) voltage output DACs * Dual output PWM/Σ-Δ DACs * On-chip temperature sensor function ±3C * On-chip voltage reference * Memory * 62 kBytes on-chip Flash/EE program memory * 4 kBytes on-chip Flash/EE data memory * Flash/EE, 100 yr retention, 100 kCycles endurance * 2304 bytes on-chip data RAM * 8051 based core * 8051 compatible instruction set (16 MHz max) * 12 interrupt sources, 2 priority levels * Dual data pointer * Extended 11-bit stack pointer * See data sheet for additional features https://elecena.pl/product/185185/microconverter-12-bit-adcs-and-dacs-with-embedded-62-kbytes-flash-mcu 2007-02-21 https://elecena.pl/product/185185/microconverter-12-bit-adcs-and-dacs-with-embedded-62-kbytes-flash-mcu 2018-03-28 https://elecena.pl/product/185185/microconverter-12-bit-adcs-and-dacs-with-embedded-62-kbytes-flash-mcu 2025-01-22