GENERAL DESCRIPTION
The ADuC814 is a fully integrated 247 kSPS 12-bit data acquisition system incorporating a high performance multichannel ADC, an 8-bit MCU, and program/data Flash/EE memory on a single chip.

FEATURES
   Analog I/O
      6-Channel 247 kSPS ADC
         12-Bit Resolution
         ADC High Speed Data Capture Mode
         Programmable Reference via On-Chip DAC for Low
            Level Inputs
         ADC Performance Down to VREF of 0.1 V
      Dual-Voltage Output DACs
         12-Bit Resolution, 15 μs Settling Time
   Memory
      8 KBytes On-Chip Flash/EE Program Memory
      640 Bytes On-Chip Flash/EE Data Memory
      Flash/EE, 100-Year Retention, 100 K Cycles
         Endurance
      Three Levels of Flash/EE Program Memory Security
      In-Circuit Serial Download (No External Hardware
         Required)
      256 Bytes On-Chip Data RAM
   8051 Based Core
      8051 Compatible Instruction Set
      32 kHz External Crystal
      On-Chip Programmable PLL (16.78 MHz Max)
      Three 16-Bit Timer/Counters
      11 Programmable I/O Lines
      11 Interrupt Sources, Two Priority Levels
   Power
      Specified for 3 V and 5 V Operation
      Normal: 3 mA @ 3 V (Core CLK = 2.1 MHz)
      Power-Down: 15 μA at 3 V (32 kHz Running)
   On-Chip Peripherals
      Power-On Reset Circuit (No Need for External
         POR Device)
      Temperature Monitor (1.5°C)
      Precision Voltage Reference
      Time Interval Counter (Wake-Up/RTC Timer)
      UART Serial I/O
      SPI®/I2C® Compatible Serial I/O
      Watchdog Timer (WDT) and Power Supply
         Monitor (PSM)
   Package and Temperature Range
      28-Lead TSSOP 4.4 mm x 9.7 mm Body Package
      Fully Specified for –40°C to +125°C Operation

APPLICATIONS
   Optical Networking—Laser Power Control
   Base Station Systems—Power Amplifier Bias Control
   Precision Instruments and Smart Sensors
   Battery-Powered Systems and General Precision
      System Monitors