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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.
Complete receiver on a chip
-109dBm sensitivity, 1kbps, and BER 10-2
Image rejection mixer
850MHz to 950MHz frequency range
Low power, 9mA @ 868MHz, continuous on
Data rates to 10kbps (Manchester Encoded)
Auto polling (sleep mode, current < 0.1 mA)
Analog RSSI output
Programmable “l(fā)ow sensitivity” mode
No IF filter required
Excellent selectivity and noise rejection
Low external part count
Additional functions programmed through serial interface

MICRF221 封裝圖
| 型號 | 制造商 | 描述 | 購買 |
|---|---|---|---|
| MICRF221AYQS-TR | Comchip Technology | 立即購買 | |
| MICRF221AYQS | ON | MOSFET N-CH 40V 110A | 立即購買 |
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