MICRF211AYQS

MICRF211 3V, QwikRadio 433.92 MHz Receiver General Description Features -2 The MICRF211 is a general purpose, 3V QwikRadio 110dBm sensitivity, 1kbps and BER 10 Receiver that operates at 433.92MHz with typical Image rejection mixer sensitivity of 110dBm. Frequency from 380MHz to 450MHz The MICRF211 functions as a super-heterodyne Low power, 6.0mA 433.92MHz, continuous on receiver for OOK and ASK modulation up to 10kbps. data rates to 10kbps (Manchester Encoded) The down-conversion mixer also provides image Analog RSSI output rejection. All post-detection data filtering is provided on the MICRF211. Any one-of-four filter bandwidths may No IF filter required be selected externally by the user in binary steps, from Excellent selectivity and noise rejection 1.25kHz to 10kHz. The user need only configure the Low external part count device with a set of easily determined values, based upon data rate, code modulation format, and desired duty-cycle operation. Datasheets and support documentation are available on Micrels website at: www.micrel.com. 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 Micrel MICRF211 Ordering Information Part Number Temperature Range Package MICRF211AYQS 40 to +105C 16-Pin QSOP Pin Configuration MICRF211AYQS Pin Description 16-Pin Pin Pin Function QSOP Name Reference resonator input connection to Colpitts oscillator stage. May also be driven by external reference 1 RO1 signal of 1.5V p-p amplitude maximum. 2 GNDRF 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 3 ANT inductor -to-RF ground is used to improve ESD protection. 4 GNDRF Negative supply connection associated with ANT RF input. 5 VDD Positive supply connection for all chip functions. 6 SQ 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 7 SEL0 pass filter bandwidth. (See filter table for SEL0 and SEL1 in application section) 8 SHDN Shutdown logic control input. Active internal pull-up. 9 GND Negative supply connection for all chip functions except RF input. 10 DO Demodulated data output. Logic control input with active internal pull-up. Used in conjunction with SEL0 to control the demodulator low 11 SEL1 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 12 CTH 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 0.47F, is connected from this pin to 13 CAGC GND 14 RSSI Received signal strength indication output. Output is from a buffer with 200 typical output impedance. 15 NC Not Connected (Connect to Ground) Reference resonator input connection to Colpitts oscillator stage, 7pF, in parallel with low resistance MOS 16 RO2 switch-to-GND, during normal operation. Driven by startup excitation circuit during the internal startup control sequence. 2 Revision 2.0 August 19, 2015 (408) 944-0800