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MICRF221-915-EV

Description
RF Receiver
CategoryTopical application    Wireless rf/communication   
File Size859KB,26 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
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MICRF221-915-EV Overview

RF Receiver

MICRF221-915-EV Parametric

Parameter NameAttribute value
Product AttributeAttribute Value
ManufacturerMicrochip
Product CategoryRF Receiver
RoHSDetails
Factory Pack Quantity1
MICRF221
3.3V, QwikRadio
®
850 MHz to 950 MHz
Receiver
General 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.
Datasheets and support documentation are available on
Micrel’s website at:
www.micrel.com.
®
Features
Complete receiver on a chip
-2
-109dBm sensitivity, 1kbps, and BER 10
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 “low sensitivity” mode
No IF filter required
Excellent selectivity and noise rejection
Low external part count
Additional functions programmed through serial
interface
Typical Application
Figure 1: MICRF221 Receiver 915.0 MHz, 1kHz Baud Rate Example
QwikRadio is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
August 12, 2015
Revision 2.0

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Description RF Receiver RF Receiver
Product Attribute Attribute Value Attribute Value
Manufacturer Microchip Microchip
Product Category RF Receiver RF Receiver
RoHS Details Details
Factory Pack Quantity 1 1
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