ADUC812BSZ Analog Devices 8bit MCU

ADUC812BSZ Overview

The ADuC812 is a fully integrated 12-bit data acquisition systemincorporating a high performance self-calibrating multichannelADC, dual DAC, and programmable 8-bit MCU (8051 instructionset compatible) on a single chip.

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

Additional MCU support functions include Watchdog Timer,Power Supply Monitor, and ADC DMA functions. Thirty-twoprogrammable I/O lines, I2C compatible SPI and StandardUART Serial Port I/O are provided for multiprocessor interfacesand I/O expansion.

Normal, idle, and power-down operating modes for both theMCU core and analog converters allow flexible power managementschemes suited to low power applications. The part isspecified for 3 V and 5 V operation over the industrial temperaturerange and is available in a 52-lead, plastic quadflatpack package.

Applications

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)

ECAD Model

Footprint

Features

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