MICRF2229 4000MHz to 4450MHz ASSK/OOK Reeceiver with Auto-Poll and RSSI Genneral Desccription Featuures The MICRF229 is a 400MHz to 4550MHz supeer- 1122dBm sensitivvity at 1kbps with 1% BERR heterrodyne, image-reject, RF rreceiver with automatic gaain Autoo-polling modde with bit cheecking contrrol, ASK/OOKK demodulatoor, and analoog RSSI output. Suppports bit ratess up to 20kbpps at 433.92MMHz It onnly requires a crystal annd a minimuum number of 25dBB image-rejecct mixer exterrnal componeents to implemment. The MICCRF229 is ideeal for low-cost, loow-power, RRKE, TPMS, and remoote No IIF filter requirred actuaation applications. 60dBB analog RSSSI output rangge 3.5VV to 5.5V supply voltage raange The MICRF229 achieves 1122dBm sensitivvity at a bit raate of 1kkbps with 1% BER. Eight demodulator fiilter bandwidtths 6.0mmA supply current at 434MMHz are sselectable in binary stepss from 1625HHz to 34kHz at 15 AA supply currrent in sleep mmode 433.992MHz, allowwing the devicce to supportt bit rates up to 0.5 A supply currrent in shutdoown mode 20kbbps. The devicce operates frrom a supply voltage of 3.55V 16-ppin 4.9mm 66.0mm QSOPP package to 5.55V, and typicaally consumees 6.0mA at 433.92MHz. The MICRRF229 has aa shutdown mmode and sleep mode thhat 40C to +105 CC temperaturee range reducce current to 0.5 A and 155A respectivvely. 2kV V HBM ESD raating Datasheets and ssupport docuumentation arre available on Appllications Micreels web site aat: www.micreel.com. Autoomotive remoote keyless enntry (RKE) Longg-range RF IDD Remmote fan/light control Garaage door/gatee openers Remmote meteringg Loww data rate unidirectional wwireless data links Typpical Application MICRFF229 433.92MHHz Typical Appplication Circuuit Micrel Inc. 2180 Fortune Drivve San Jose, CCA 95131 USA tel +1 (408) 9444-0800 fax + 11 (408) 474-10000 Micrel, Inc. MICRF229 Ordering Information Junction Part Number Top Marking Temperature Package Range MICRF229YQS MICRF229YQS 40C to +105C 16-Pin 4.9mm 6.0mm QSOP Pin Configuration 16-Pin 4.9mm 6.0mm QSOP (QS) (Top View) Pin Description Pin Pin Type Pin Function Number Name Reference Resonator Connection (to the Pierce oscillator): Can also be driven by external 1 RO1 In to 1.5V amplitude maximum. Internal capacitance of 7pF to reference signal of 200mVP-P P-P GND during normal operation. 2 RFGND Supply Ground Connection for ANT RF Input: Connect to PCB ground plane. Antenna Input: RF signal input from antenna. Internally AC coupled. It is recommended to use 3 ANT Input a matching network with an inductor to RF ground to improve ESD protection. 4 RFGND Supply Ground Connection for ANT RF Input: Connect to PCB ground plane. Internal Supply Decoupling Access: Bypass to PCB ground plane with a 0.1F ceramic 5 CDEC Supply capacitor located as close to pin as possible. Maximum operating voltage is 3.6V. Squelch Control Logic-Level Input: An internal pull-up (3A typical) pulls the logic-input HIGH 6 SQ Input when the device is enabled. This feature is not recommended in MICRF229 and this pin should remain floating. Positive Supply Connection (for all chip functions): Bypass with 1F capacitor located as close 7 VDD Supply to the VDD pin as possible. April 15, 2015 Revision 1.0 2