Features and Benefits

    • 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

Product Details

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.


  • Optical networking—laser power control
  • Base station systems
  • Precision instrumentation, smart sensors
  • Transient capture systems
  • DAS and communications systems

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Documentation & Resources

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  • Data Sheets (2)
  • Application Notes (13)
  • User Guides (2)
  • Technical Articles (1)
  • Application Notes

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