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  5. ADUC812


Features and Benefits

  • Analog I/O
    • 8-Channel, High Accuracy 12-Bit ADC
    • On-Chip, 100 ppm/°C Voltage Reference
    • High Speed 200 kSPS
    • DMA Controller for High Speed ADC-to-RAM Capture
    • 2 12-Bit Voltage Output DACs
    • On-Chip Temperature Sensor Function
  • Memory
    • 8K Bytes On-Chip Flash/EE Program Memory
    • 640 Bytes On-Chip Flash/EE Data Memory
    • 256 Bytes On-Chip Data RAM
    • 16M Bytes External Data Address Space
    • 64K Bytes External Program Address Space
  • 8051 Compatible Core
    • 12 MHz Nominal Operation (16 MHz Max)
    • 3 16-Bit Timer/Counters
    • High Current Drive Capability—Port 3
    • 9 Interrupt Sources, 2 Priority Levels
  • Power
    • Specified for 3 V and 5 V Operation
    • Normal, Idle, and Power-Down Modes
  • On-Chip Peripherals
    • UART and SPI® Serial I/O
    • 2-Wire (400 kHz I2C® Compatible) Serial I/O
    • Watchdog Timer
  • Power Supply Monitor

Product Details

The ADuC812 is a fully integrated 12-bit data acquisition system incorporating a high performance self-calibrating multichannel ADC, dual DAC, and programmable 8-bit MCU (8051 instruction set compatible) on a single chip.

The programmable 8051 compatible core is supported by 8K bytes Flash/EE program memory, 640 bytes Flash/EE data memory, and 256 bytes data SRAM on-chip.

Additional MCU support functions include Watchdog Timer, Power Supply Monitor, and ADC DMA functions. Thirty-two programmable I/O lines, I2C compatible SPI and Standard UART Serial Port I/O are provided for multiprocessor interfaces and I/O expansion.

Normal, idle, and power-down operating modes for both the MCU core and analog converters allow flexible power management schemes suited to low power applications. The part is specified for 3 V and 5 V operation over the industrial temperature range and is available in a 52-lead, plastic quad flatpack package.


  • Intelligent Sensors Calibration and Conditioning
  • Battery-Powered Systems (Portable PCs, Instruments, Monitors)
  • Transient Capture Systems
  • DAS and Communications Systems
  • Control Loop Monitors (Optical Networks/Base Stations)

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

  • View All (19)
  • Data Sheets (2)
  • Application Notes (13)
  • User Guides (2)
  • Technical Articles (2)
  • Application Notes

    Software & Systems Requirements

    Code Examples

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    ADUC812BSZ Material Declaration Reliability Data 52-Lead MQFP (10mm x 10mm)
    ADUC812BSZ-REEL Material Declaration Reliability Data 52-Lead MQFP (10mm x 10mm)
    Wafer Fabrication Data

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    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.