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Micrel Semiconductor

MICRF211 Datasheet Preview

MICRF211 Datasheet

QwikRadio 433.92 MHz Receiver

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MICRF211
3V, QwikRadio® 433.92 MHz Receiver
General Description
Features
The MICRF211 is a general purpose, 3V QwikRadio
Receiver that operates at 433.92MHz with typical
sensitivity of -110dBm.
The MICRF211 functions as a super-heterodyne
receiver for OOK and ASK modulation up to 10kbps.
The down-conversion mixer also provides image
rejection. All post-detection data filtering is provided on
the MICRF211. Any one-of-four filter bandwidths may
be selected externally by the user in binary steps, from
1.25kHz to 10kHz. The user need only configure the
device with a set of easily determined values, based
upon data rate, code modulation format, and desired
duty-cycle operation.
–110 dBm sensitivity, 1kbps and BER 10E-02
Image Rejection Mixer
Frequency from 380MHz to 450MHz
Low power, 6.0mA @ 433.92MHz, continuous on
data rates to 10kbps (Manchester Encoded)
Analog RSSI Output
No IF filter required
Excellent selectivity and noise rejection
Low external part count
Ordering Information
Part Number
Temperature Range
Package
MICRF211AYQS
–40° to +105°C
16-Pin QSOP
_______________________________________________________________________________________________
Typical Application
433.92 MHz, 1kHz Baud Rate Example
QwikRadio is a registered trademark of Micrel, Inc.
Certain of the QwikRadio ICs were developed under a development agreement with AIT of Orlando, FL.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 2007
M9999-030107
(408) 944-0800




Micrel Semiconductor

MICRF211 Datasheet Preview

MICRF211 Datasheet

QwikRadio 433.92 MHz Receiver

No Preview Available !

Micrel
www.DataSheet4U.com
Pin Configuration
MICRF211
MICRF211AYQS
Pin Description
16-Pin
QSOP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin
Name
RO1
GNDRF
ANT
GNDRF
VDD
SQ
SEL0
SHDN
GND
DO
SEL1
CTH
CAGC
RSSI
NC
RO2
Pin Function
Reference resonator input connection to Colpitts oscillator stage. May also be driven by external reference
signal of 1.5V p-p amplitude maximum.
Negative supply connection associated with ANT RF input.
RF signal input from antenna. Internally AC coupled. It is recommended that a matching network with an
inductor -to-RF ground is used to improve ESD protection.
Negative supply connection associated with ANT RF input.
Positive supply connection for all chip functions.
Squelch control logic input with an active internal pull-up when not shut down.
Logic control input with active internal pull-up. Used in conjunction with SEL1 to control the demodulator low
pass filter bandwidth. (See filter table for SEL0 and SEL1 in application section)
Shutdown logic control input. Active internal pull-up.
Negative supply connection for all chip functions except RF input.
Demodulated data output.
Logic control input with active internal pull-up. Used in conjunction with SEL0 to control the demodulator low
pass filter bandwidth. (See filter table for SEL0 and SEL1 in application section)
Demodulation threshold voltage integration capacitor connection. Tie an external capacitor across CTH pin
and GND to set the settling time for the demodulation data slicing level. Values above 1nF are
recommended and should be optimized for data rate and data profile.
AGC filter capacitor connection. CAGC capacitor, normally greater than 0.47µF, is connected from this pin to
GND
Received signal strength indication output. Output is from a buffer with 200typical output impedance.
Not Connected (Connect to Ground)
Reference resonator input connection to Colpitts oscillator stage, 7pF, in parallel with low resistance MOS
switch-to-GND, during normal operation. Driven by startup excitation circuit during the internal startup control
sequence.
March 2007
2 M9999-030107
(408) 944-0800


Part Number MICRF211
Description QwikRadio 433.92 MHz Receiver
Maker Micrel Semiconductor
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MICRF211 Datasheet PDF





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