ADUC8  -  Series DataSheet
ADuC814  -  MicroConverter?, Small Package 12-Bit ADC with Embedded Flash MCU  -  Analog Devices  -  8051

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

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.
This low power device operates from a 32 kHz crystal with an on-chip PLL generating a high frequency clock of 16.78 MHz.
This clock is, in turn, routed through a programmable clock divider from which the MCU core clock operating frequency is generated.
The microcontroller core is an 8052 and is compatible with an 8051 instruction. 8 kBytes of nonvolatile Flash/EE program memory are provided on-chip. 640 bytes of nonvolatile Flash/EE data memory and 256 bytes RAM are also integrated on-chip.
The ADuC814 also incorporates additional analog functionality with dual 12-bit DACs, a power supply monitor, and a band gap reference. On-chip digital peripherals include a watchdog timer, time interval counter, three timer/counters, and two serial I/O ports (SPI and UART).
On-chip factory firmware supports in-circuit serial download and debug modes (via UART), as well as single-pin emulation mode via the DLOAD pin. The ADuC814 is supported by a QuickStart™ Development System.
The part operates from a single 3 V or 5 V supply over the extended temperature range −40°C to +125°C. When operating from 3 V supplies, the power dissipation for the part is below 10 mW. The ADuC814 is housed in a 28-lead TSSOP package.