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 specified to VREF = 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 kcycle endurance

3 levels of Flash/EE program memory security

In-circuit serial downlaod (no external hardware)

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, 2 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 (32 kHz oscillator running)

On-chip peripherals

Power-on reset circuit (no need for external POR device)

Temperature monitor (±1.5°C accuracy)

Precision voltage reference

Time interval counter (wake-up/RTC timer)

UART serial I/O

SPI?/I2C? compatible serial I/O

Watchdog timer (WDT), power supply monitor (PSM)

Package and temperature range

28-lead TSSOP 4.4 mm × 9.7 mm 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, smart sensors

Battery-powered systems, precision system monitors