MICRF221中文资料3.3V, QwikRadio® 850 MHz to 950 MHz Receiver数据手册Microchip规格书

描述 Description

The MICRF221 is a third generation QwikRadio® receiver, offering all the benefits of Micrel's earlier QwikRadio products with significant improvements, including: enhanced sensitivity, automatic duty-cycle feature and RSSI output.The MICRF221 is a super-heterodyne receiver, designed for OOK and ASK modulation. The down-conversion mixer also provides image rejection. The MICRF221 receiver provides a SLEEP Mode for duty-cycle operation and an enhanced, customer programmable \"WAKE\" function. These features are further combined into a wholly integrated \"self-polling\" scheme that is ideal for low and ultra-low power applications, such as RKE and RFID All post-detection data filtering is provided on the MICRF221 receiver. Any one of four filter bandwidths may be selected externally by the user in binary steps, from 1.25kHz to 10kHz. The user needs only to program the device with a set of easily determined values based on data rate, code modulation format, and desired duty-cycle operation.

特性 Features

• Complete Receiver on a Chip
• -109dBm sensitivity, 1 kbps and BER 10E-02
• Image Rejection Mixer
• 850 MHz to 950 MHz frequency range
• Low Power, 9mA @ 868 MHz, continuous on
• Data Rates to 10kbps (Manchester Encoded)
• Auto polling (sleep mode, current < 0.1 mA)
•Analog RSSI Output
• Programmable “Low Sensitivity” mode
• No IF filter required
• Excellent selectivity and noise rejection
• Low external part count
• Additional Functions Programmed through serial interface 

简介

MICRF221属于开发板套件编程器的射频评估开发套件开发板。由制造生产的MICRF221射频评估和开发套件，开发板本系列中的产品适用于在已知实施环境中，提供能访问射频相关器件的功能或者有助于访问该功能。所含的焦点产品范围从射频信号链元器件（如放大器和检测器）到模块化收发器，以及不直接包含焦点产品的适配器硬件，但此类硬件可供方便地访问用户单独提供的特定射频产品或系列。