ADUC831 Datasheet

• 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

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

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.