GENERAL DESCRIPTION

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.

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

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)