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| ADuCRF101 无线风速和风向数据采集系统解决方案 |
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| 文章来源： 更新时间：2015/3/3 9:22:00 |
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ADI公司的ADuCRF101是用于低功耗无线应用的全集成的数据采集解决方案,集成了12位ADC,低功耗ARM® Cortex®-M3处理器, 862 MHz 到928 MHz和431 MHz到464 MHz RF收发器,以及闪存/EE存储器.工作电压2.2 V-3.6 V,主要用在电池供电的无线传感器, 远程医疗系统,资产跟踪, 工业和家庭自动化,健康和健身设备以及安全系统.本文介绍了ADuCRF101主要特性,功能框图, ADuCRF101评估板主要特性,电路图,材料清单和PCB元件布局图,以及无线风速和风向数据采集系统功能框图和ADuCRF101评估板测试建立图.
The ADuCRF101 is a fully integrated, data acquisition solution that is designed for low power, wireless applications. It features a 12-bit analog-to-digital converter (ADC), a low power ARM® Cortex®-M3 processor, a 862 MHz to 928 MHz and 431 MHz to 464 MHz RF transceiver, and Flash®/EE memory. The ADuCRF101 is packaged in a 9 mm × 9 mm LFCSP.
The data acquisition section consists of a 12-bit SAR ADC. The six inputs can be configured in single-ended or differential mode. When configured in single-ended mode, they can be used for ratiometric measurements on sensors that are powered, when required, from the internal low dropout regulator (LDO). An internal battery monitor channel and an on-chip tempera-ture sensor are also available.
This wireless data acquisition system is designed to operate in battery-powered applications where low power is critical. The device can be configured in normal operating mode or different low power modes under direct program control. In flexi mode, any peripheral can wake up the device and operate it. In hibernate mode, the internal wake-up timer remains active. In shutdown mode, only an external interrupt can wake up the device.
The ADuCRF101 integrates a low power ARM Cortex-M3 processor. It is a 32-bit RISC machine, offering up to 1.25 DMIPS peak performance. The ARM Cortex-M3 processor also has a flexible 14-channel direct memory access (DMA) controller that supports communication peripherals, serial peripheral interface (SPI), UART, and I2C. Also provided on chip are 128 kB of nonvolatile Flash/EE memory and 16 kB of SRAM.
A 16 MHz on-chip oscillator generates the system clock. This clock can be internally divided for the processor to operate at a lower frequency, thus saving power. A low power, internal 32 kHz oscillator is available and can be used to clock the four timers, as follows: two general-purpose timers, a wake-up timer, and a system watchdog timer.
A range of communication peripherals can be configured, as required, in a specific application. These peripherals include UART, I2C, SPI, GPIO ports, PWM, and RF transceivers.
The RF transceiver communicates in the 862 MHz to 928 MHz and 431 MHz to 464 MHz frequency bands using multiple configurations.
On-chip factory firmware supports in-circuit serial download via the UART, and nonintrusive emulation and program download are also supported via the serial wire interface. These features are incorporated into a low cost development system supporting this precision analog microcontroller family.
The ADuCRF101 operates from 2.2 V to 3.6 V and is specified over an industrial temperature range of −40℃ to +85℃. It is available in a 64-lead LFCSP package.
ADuCRF101主要特性:
Analog input/output (I/O)
6-channel, 12-bit SAR ADC
Single-ended and differential inputs
Programmable data rate of up to 167 kSPS
On-chip voltage reference
Supply range: 2.2 V to 3.6 V
Power consumption
280 nA in shutdown mode, nonretained state
1.9 μA in hibernate mode, processor memory and transceiver memory retained, RF transceiver in sleep mode
210 μA/MHz Cortex-M3 dynamic current
12.8 mA transceiver in receive mode, Cortex-M3 in hibernate mode
9 mA to 32 mA transceiver in transmit mode, Cortex-M3 in hibernate mode
RF transceiver
Frequency bands
862 MHz to 928 MHz
431 MHz to 464 MHz
Multiple configurations supported
Receiver sensitivity, bit error rate (BER)
−107.5 dBm at 38.4 kbps, 2FSK
Single-ended and differential power amplifier (PA)
Low external bill of materials (BOM)
Microcontroller
32-bit ARM Cortex-M3 processor
Serial wire download and debug
External watch crystal for wake-up timer
16 MHz internal oscillator with 8-way, programmable divider
Memory
128 kB Flash/EE memory, 16 kB SRAM
10,000-cycle Flash/EE endurance
10-year Flash/EE retention
In-circuit download via serial wire and UART
On-chip peripherals
UART, I2C, and SPI serial I/O
28-pin GPIO port
2 general-purpose, 16-bit timers
32-bit wake-up timer
16-bit watchdog timer
8-channel pulse-width modulation (PWM)
Package
64-lead, 9 mm × 9 mm LFCSP
Temperature range: −40℃ to +85℃
Tools
Low cost development system
Third-party compiler and emulator tool support
ADuCRF101应用:
Battery-powered wireless sensors
Medical telemetry systems
Industrial and home automation
Asset tracking
Security systems (access systems)
Health and fitness applications
图1. ADuCRF101功能框图
ADuCRF101评估板
The ADuCRF101 is a fully integrated, data acquisition solution designed for low power wireless applications. It features a 12-bit ADC, a low power ARM Cortex™-M3 processor, a 431 MHz to 464 MHz and 862 MHz to 928 MHz RF transceiver, and Flash/EE memory, in a 9 mm × 9 mm LFCSP package.
EVALUATION BOARD OVERVIEW
The ADuCRF101 mini board allows a user to program, debug, and evaluate the performance of the ADuCRF101. Its small form factor makes it the ideal hardware for evaluation of large wireless sensor networks.
Six kits are available, from a mini board only, to a combination of emulator and boards.
• EV-ADuCRF101MK3Z mini board for 433 MHz operation
• EV-ADuCRF101MK1Z mini board for 868 MHz/915 MHz operation
• EV-ADuCRF101QSP1Z QuickStart Plus for 868 MHz/915 MHz operation
• EV-ADuCRF101QSP3Z QuickStart Plus for 433 MHz operation
• EV-ADuCRF101QS1Z QuickStart for 868 MHz/915 MHz operation
• EV-ADuCRF101QS3Z QuickStart for 433 MHz operation
ADuCRF101评估板主要特性:
4-layer PCB (33 mm × 55 mm form factor)
2 power supply options
2.2 V to 3.6 V from an external power supply
5 V from interface/emulator board
Power indicator/general-purpose LEDs
Reset and download push buttons
8-pin connector to the interface/emulator board or to RS-232 interface cable (top row)
Access to ADuCRF101 pins on the two footprints for through-hole connectors on the edge of the board
32.768 kHz watch crystal footprint
Matching network and SMA connector for wireless communication
EVALUATION KIT CONTENTS
A DVD containing evaluation software, user guides, data sheets, and example code Antenna
Emulator board (QuickStart and QuickStart Plus kits only)
图2. ADuCRF101评估板外形图
图3. ADuCRF101评估板电路图(1)
图4. ADuCRF101评估板电路图(2)
图5. ADuCRF101评估板电路图(3)
ADuCRF101评估板材料清单:
MK1模型(868MHz/915MHz,差分PA)材料清单:
MK1模型(868MHz/915MHz,差分PA)谐波滤波器材料清单:
图6. ADuCRF101评估板PCB元件布局图(顶层)
图7. ADuCRF101评估板PCB元件布局图(底层)
图8.无线风速和风向数据采集系统功能框图
图9. ADuCRF101评估板测试建立图
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