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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ADUC824 датащи(PDF) 1 Page - Analog Devices |
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ADUC824 датащи(HTML) 1 Page - Analog Devices |
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1 / 68 page  REV.B 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. a ADuC824 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 MicroConverter®, Dual-Channel 16-/24-Bit ADCs with Embedded FLASH MCU FEATURES High Resolution Sigma-Delta ADCs Two Independent ADCs (16- and 24-Bit Resolution) Programmable Gain Front End 24-Bit No Missing Codes, Primary ADC 13-Bit p-p Resolution @ 20 Hz, 20 mV Range 18-Bit p-p Resolution @ 20 Hz, 2.56 V Range Memory 8 KB On-Chip Flash/EE Program Memory 640 Bytes On-Chip Flash/EE Data Memory Flash/EE, 100 Year Retention, 100 Kcycles Endurance 256 Bytes On-Chip Data RAM 8051-Based Core 8051-Compatible Instruction Set (12.58 MHz Max) 32 kHz External Crystal, On-Chip Programmable PLL Three 16-Bit Timer/Counters 26 Programmable I/O Lines 11 Interrupt Sources, Two Priority Levels Power Specified for 3 V and 5 V Operation Normal: 3 mA @ 3 V (Core CLK = 1.5 MHz) Power-Down: 20 A (32 kHz Crystal Running) On-Chip Peripherals On-Chip Temperature Sensor 12-Bit Voltage Output DAC Dual Excitation Current Sources Reference Detect Circuit Time Interval Counter (TIC) UART Serial I/O I2C®-Compatible and SPI® Serial I/O Watchdog Timer (WDT), Power Supply Monitor (PSM) APPLICATIONS Intelligent Sensors (IEEE1451.2-Compatible) Weigh Scales Portable Instrumentation Pressure Transducers 4–20 mA Transmitters MicroConverter is a registered trademark of Analog Devices, Inc. SPI is a registered trademark of Motorola, Inc. I 2C is a registered trademark of Philips Semiconductors, Inc. GENERAL DESCRIPTION The ADuC824 is a complete smart transducer front-end, inte- grating two high-resolution sigma delta ADCs, an 8-bit MCU, and program/data Flash/EE Memory on a single chip. This low power device accepts low-level signals directly from a transducer. 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 are intended for the measurement of wide dynamic range, low-frequency signals, such as those in weigh scale, strain-gauge, pressure trans- ducer, or temperature measurement applications. The ADC output data rates are programmable and the ADC output resolution will vary with the programmed gain and output rate. 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, 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 therefore 8051-instruction- set-compatible. The microcontroller core machine cycle consists of 12 core clock periods of the selected core operating frequency. 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 ADuC824 also incorporates additional analog functionality with a 12-bit DAC, current sources, power supply monitor, and a bandgap reference. On-chip digital peripherals include a watchdog timer, time interval counter, three timers/counters, and three serial I/O ports (SPI, UART, and I 2C-compatible). 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. A functional block diagram of the ADuC824 is shown above with a more detailed block diagram shown in Figure 12. The part operates from a single 3 V or 5 V supply. When operating from 3 V supplies, the power dissipation for the part is below 10 mW. The ADuC824 is housed in a 52-lead MQFP package. FUNCTIONAL BLOCK DIAGRAM 8 KBYTES FLASH/EE PROGRAM MEMORY 640 BYTES FLASH/EE DATA MEMORY 256 BYTES USER RAM 3 16 BIT TIMER/COUNTERS 1 TIME INTERVAL COUNTER 4 PARALLEL PORTS 8051-BASED MCU WITH ADDITIONAL PERIPHERALS ON-CHIP MONITORS POWER SUPPLY MONITOR WATCHDOG TIMER I2C-COMPATIBLE UART AND SPI SERIAL I/O PGA ADuC824 PROG. CLOCK DIVIDER XTAL2 XTAL1 BUF AVDD AGND MUX TEMP SENSOR REFIN+ REFIN– EXTERNAL VREF DETECT INTERNAL BANDGAP VREF AIN1 AIN2 AIN3 AIN4 AIN5 AUXILIARY 16-BIT - ADC PRIMARY 24-BIT - ADC MUX OSC AND PLL 12-BIT VOLTAGE O/P DAC BUF CURRENT SOURCE MUX AVDD IEXC1 IEXC2 DAC |
Аналогичный номер детали - ADUC824 |
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Аналогичное описание - ADUC824 |
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ссылки URL |
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