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ADUC836 Datasheet(PDF) 1 Page - Analog Devices |
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ADUC836 Datasheet(HTML) 1 Page - Analog Devices |
1 / 80 page 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 other- wise 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 © 2003 Analog Devices, Inc. All rights reserved. ADuC836 MicroConverter®, Dual 16-Bit - ADCs with Embedded 62 kB Flash MCU FEATURES High Resolution - ADCs 2 Independent ADCs (16-Bit Resolution) 16-Bit No Missing Codes, Primary ADC 16-Bit rms (16-Bit p-p) Effective Resolution @ 20 Hz Offset Drift 10 nV/C, Gain Drift 0.5 ppm/C Memory 62 Kbytes On-Chip Flash/EE Program Memory 4 Kbytes On-Chip Flash/EE Data Memory Flash/EE, 100 Year Retention, 100 Kcycles Endurance 3 Levels of Flash/EE Program Memory Security In-Circuit Serial Download (No External Hardware) High Speed User Download (5 Seconds) 2304 Bytes On-Chip Data RAM 8051 Based Core 8051 Compatible Instruction Set 32 kHz External Crystal On-Chip Programmable PLL (12.58 MHz Max) 3 16-Bit Timer/Counter 26 Programmable I/O Lines 11 Interrupt Sources, 2 Priority Levels Dual Data Pointer, Extended 11-Bit Stack Pointer On-Chip Peripherals Internal Power on Reset Circuit 12-Bit Voltage Output DAC Dual 16-Bit - DACs/PWMs On-Chip Temperature Sensor Dual Excitation Current Sources Time Interval Counter (Wake-Up/RTC Timer) UART, SPI®, and I2C® Serial I/O High Speed Baud Rate Generator (Including 115,200) Watchdog Timer (WDT) Power Supply Monitor (PSM) Power Normal: 2.3 mA Max @ 3.6 V (Core CLK = 1.57 MHz) Power-Down: 20 A Max with Wake-Up Timer Running Specified for 3 V and 5 V Operation Package and Temperature Range 52-Lead MQFP (14 mm 14 mm), –40C to +125C 56-Lead LFCSP (8 mm 8 mm), –40C to +85C APPLICATIONS Intelligent Sensors Weigh Scales Portable Instrumentation, Battery-Powered Systems 4–20 mA Transmitters Data Logging Precision System Monitoring FUNCTIONAL BLOCK DIAGRAM 62 KBYTES FLASH/EE PROGRAM MEMORY 4 KBYTES FLASH/EE DATA MEMORY 2304 BYTES USER RAM 3 16 BIT TIMERS BAUD R ATE TIMER 4 PARALLEL PORTS 8051-BASED MCU WITH ADDITIONAL PERIPHERALS POWER SUPPLY MON WATCHDOG TIMER UART, SPI, AND I2C SERIAL I/O ADuC836 XTAL2 XTAL1 BUF AGND REFIN+ REFIN– INTERNAL BAND GAP VREF AIN1 AIN2 AIN3 AIN4 AIN5 AUXILIARY 16-BIT - ADC PRIMARY 16-BIT - ADC MUX OSC AVDD MUX PGA DUAL 16-BIT - DAC BUF DAC CURRENT SOURCE AVDD IEXC1 IEXC2 PWM0 PWM1 DUAL 16-BIT PWM WAKE- UP/ RTC TIMER TEMP SENSOR EXTERNAL VREF DETECT 12-BIT DAC MUX DGND DVDD RESET POR PLL AND PROG CLOCK DIV GENERAL DESCRIPTION The ADuC836 is a complete smart transducer front end, integrating two high resolution - ADCs, an 8-bit MCU, and program/data Flash/EE memory on a single chip. The two independent ADCs (primary and auxiliary) include a temperature sensor and a PGA (allowing direct measurement of low level signals).The ADCs with on-chip digital filtering and programmable output data rates are intended for the measure- ment of wide dynamic range, low frequency signals, such as those in weigh scale, strain gage, pressure transducer, or temperature measurement applications. The device operates from a 32 kHz crystal with an on-chip PLL generating a high frequency clock of 12.58 MHz.This clock is routed through a programmable clock divider from which the MCU core clock operating frequency is generated.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, 4 Kbytes of nonvolatile Flash/EE data memory, and 2304 bytes of data RAM are provided on-chip.The program memory can be configured as data memory to give up to 60 Kbytes of NV data memory in data logging applications. 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 ADuC836 is supported by a QuickStart™ development system featuring low cost software and hardware development tools. REV. A |
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