GENERAL DESCRIPTION

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

FEATURES
ANALOG I/O
8-Channel, High Accuracy 12-Bit ADC
On-Chip, 40 ppm/°CC Voltage Reference
High Speed 200 kSPS
DMA Controller for High Speed ADC-to-RAM Capture
Two 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
On-Chip Charge Pump (No Ext. VPP Requirements)
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)
Three 16-Bit Timer/Counters
32 Programmable I/O lines
High Current Drive Capability—Port 3
Nine Interrupt Sources, Two Priority Levels
POWER
Specified for 3 V and 5 V Operation
Normal, Idle and Power-Down Modes
ON-CHIP PERIPHERALS
UART Serial I/O
2-Wire (I2C®-Compatible) and SPI® Serial I/O
Watchdog Timer
Power Supply Monitor

APPLICATIONS
Intelligent Sensors (IEEE 1451.2-Compatible)
Battery Powered Systems (Portable PCs, Instruments,
Monitors)
Transient Capture Systems
DAS and Communications Systems