ADUC812 Datasheet

• 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

• 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)

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.