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ADUC814BRU Arkusz danych(PDF) 1 Page - Analog Devices |
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ADUC814BRU Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 72 page MicroConverter®, Small Package 12-Bit ADC with Embedded Flash MCU ADuC814 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2003 Analog Devices, Inc. All rights reserved. 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 FUNCTIONAL BLOCK DIAGRAM ADuC814 PROG. CLOCK DIVIDER XTAL2 XTAL1 T/H AIN MUX TEMP MONITOR INTERNAL BAND GAP VREF AIN0 VREF CREF AIN5 OSC AND PLL DAC1 DAC0 BUF BUF DAC0 DAC1 DAC CONTROL LOGIC 12-BIT ADC ADC CONTROL LOGIC BUF POWER- ON RESET 8 KBYTES FLASH/EE PROGRAM MEMORY 640 BYTES FLASH/EE DATA MEMORY 256 BYTES USER RAM 3 × 16-BIT TIMER/COUNTERS 1 × WAKE-UP/RTC TIMER 10 × DIGITAL I/O PINS 8051-BASED MCU WITH ADDITIONAL PERIPHERALS ON-CHIP MONITORS POWER SUPPLY MONITOR WATCHDOG TIMER UART AND SPI SERIAL I/O Figure 1. GENERAL DESCRIPTION The ADuC814 is a fully integrated 247 kSPS, 12-bit data acquisi- tion 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. |
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