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ADUC831 Datasheet(PDF) 1 Page - Analog Devices |
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ADUC831 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 76 page  REV. 0 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. 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 companies. 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 © Analog Devices, Inc., 2002. All rights reserved. ADuC831 FEATURES ANALOG I/O 8-Channel, 247 kSPS 12-Bit ADC DC Performance: 1 LSB INL AC Performance: 71 dB SNR DMA Controller for High Speed ADC-to-RAM Capture 2 12-Bit (Monotonic) Voltage Output DACs Dual Output PWM/ - DACs On-Chip Temperature Sensor Function 3 C On-Chip Voltage Reference Memory 62 kBytes On-Chip Flash/EE Program Memory 4 kBytes On-Chip Flash/EE Data Memory Flash/EE, 100 Yr Retention, 100 kCycles Endurance 2304 Bytes On-Chip Data RAM 8051 Based Core 8051 Compatible Instruction Set (16 MHz Max) 12 Interrupt Sources, 2 Priority Levels Dual Data Pointer Extended 11-Bit Stack Pointer On-Chip Peripherals Time Interval Counter (TIC) UART, I2C®, and SPI® Serial I/O Watchdog Timer (WDT), Power Supply Monitor (PSM) Power Specified for 3 V and 5 V Operation Normal, Idle, and Power-Down Modes Power-Down: 20 A @ 3 V APPLICATIONS Optical Networking—Laser Power Control Base Station Systems Precision Instrumentation, Smart Sensors Transient Capture Systems DAS and Communications Systems Pin compatible upgrade to existing ADuC812 systems that require additional code or data memory. Runs from 1 MHz–16 MHz to external crystal. The ADuC832 is also available. Functionally is the same as the ADuC831, except the ADuC832 runs from a 32 kHz external crystal with on-chip PLL. MicroConverter is a registered trademark and QuickStart is a trademark of Analog Devices, Inc. SPI is a registered trademark of Motorola, Inc. I 2C is a registered trademark of Philips Corporation. GENERAL DESCRIPTION The ADuC831 is a fully integrated 247 kSPS data acquisition system incorporating a high performance self-calibrating multi- channel 12-bit ADC, dual 12-bit DACs, and programmable 8-bit MCU on a single chip. The microcontroller core is an 8052, and therefore 8051- instruction-set compatible with 12 core clock periods per machine cycle. 62 kBytes of nonvolatile Flash/EE program memory are provided on-chip. Four kBytes of nonvolatile Flash/EE data memory, 256 bytes RAM and 2 kBytes of extended RAM are also integrated on-chip. The ADuC831 also incorporates additional analog functionality with two 12-bit DACs, power supply monitor, and a band gap reference. On-chip digital peripherals include two 16-bit Σ-∆ DACs, dual output 16-bit PWM, watchdog timer, time interval counter, three timers/counters, Timer 3 for baud rate generation and serial I/O ports (I 2C, 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 EA pin. The ADuC831 is supported by QuickStart™ and QuickStart Plus development systems featuring low cost software and hardware development tools. A functional block diagram of the ADuC831 is shown above with a more detailed block diagram shown in Figure 1. The part is specified for 3 V and 5 V operation over the extended industrial temperature range, and is available in a 52-lead plastic quad flatpack package and in a 56-lead chip scale package. FUNCTIONAL BLOCK DIAGRAM 62 kBYTES FLASH/EE PROGRAM MEMORY 4 kBYTES FLASH/EE DATA MEMORY 2304 BYTES USER RAM 3 16 BIT TIMERS 1 REAL TIME CLOCK PARALLEL PORTS 8051-BASED MCU WITH ADDITIONAL PERIPHERALS ADuC831 XTAL2 XTAL1 TEMP SENSOR VREF INTERNAL BAND GAP VREF ADC0 ADC1 ADC5 ADC6 ADC7 OSC 12-BIT DAC DAC PWM0 T/H MUX 12-BIT ADC HARDWARE CALIBRATON BUF DAC BUF PWM1 12-BIT DAC 16-BIT - DAC 16-BIT - DAC 16-BIT PWM 16-BIT PWM POWER SUPPLY MON WATCHDOG TIMER UART, I2 C, AND SPI SERIAL I/O MUX MicroConverter®, 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCU |
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