e mbedding the wireless future.. features typical applications description - i - rcr-xxx-hp low cost 315/418/433.92 mhz super-he t ask/ook rec e ive r ? remote keyles s entry (rke) ? remote lighting controls ? on-site paging ? a sset tracking ? wireless alarm and security systems ? long range rfid ? automated resource management ? low cost ? 150khz receiving bandwidth ? 5v operation ? 4.5ma current drain ? no external parts are required ? small size: 1.98? x 0.72? ? 4800 baud operation the rcr-xxx-hp is ideal for remote control applications where low cost and longer range are required. the receiver module requires no external rf components except for the antenna. i t generates virtually no emissions, making fcc and etsi approvals easy. the super-heterodyne desi gn exhibits exceptional sensitivity and selectivity. a saw filter can be added to the antenna input to improve selectivit y for applications that require robust performance. the manufacturing-friendly sip style package and low-cost make t he rcr-433-hp suitable for high volume applications.
rcr-xxx- hp super- h et ask/ook receiver data sheet document control created by st eve m ont gom ery 5/ 21/ 01 engineering review marketing review approved - engineering approved - marketing revision history revision author date description 1 . 0 s j m 5 / 2 1 / 0 1 docum e nt c r e a t e d 1 . 1 g w h 7 / 2 9 / 0 3 u p d a t e d . 1 . 2 s j m 1 1 / 2 2 / 0 4 u p d a t e d - 1 - 11/30/2004
rcr-xxx- hp super- h et ask/ook receiver data sheet mechanical drawing pinout diagram notes: 1). w h en designing products with the m odule, the designer should account for tolerances in the dim e nsions of the circuit board. 2). com ponent location and spacing are subject to change. the designer should not place any com ponents inside the footprint of the m odule. absolute m aximum ratings rating value units power supply and all input pins -0.3 to +12 vdc storage temperature -50 to +100 electrical characteristics characteristic sy mbol min ty p max units notes operating voltage v cc 4 . 5 5 . 0 5 . 5 v d c n o n e operating current i cc - - 4 . 5 - - m a n o n e reception bandwidth bw rx - - 1 5 0 - - k h z n o n e f c - - 3 1 5 - - m h z r c r - 3 1 5 - h p f c - - 4 1 8 - - m h z r c r - 4 1 8 - h p center frequency f c - - 4 3 3 . 9 2 - - m h z r c r - 4 3 3 - h p s e n s i t i v i t y n o n e - - - 1 0 9 - - d b m n o n e baud rate ? nrz none 1200 -- 4800 bps none baud rate ? pwm none 120 -- 2400 bps none audio bandwidth bw audio . 1 5 - - 2 . 8 k h z n o n e s e l e c t i v i t y n o n e t b d t b d t b d operating temperature t op - 2 0 - - + 7 0 - 2 - 11/30/2004
rcr-xxx- hp super- h et ask/ook receiver data sheet pin description pin name descript i on 1 gnd receiver ground. connect to ground plane. 2 data digital data output. this output is capabl e of driving one ttl or cmos load. it is a cmos compatible output. 3 v cc (5v) provides operating voltage for the receiver. vcc should be bypassed with a .01 ? theory of operation super-heterody ne am detection the rcr-xxx-hp is a super-heterodyne am receiver with a built-in data slicer. the incoming am carrier is amplified and downconverted to an inte rmediate frequency (if) of 10.7mhz. this if is filtered using a ceramic bandpass filter with a 150khz 3db bandwidth. the output of the if filter is then amplifi ed and demodulated using diode det ector. the output of the diode detector is the demodulated am envelope of the carrier. this signal is applied to the data slicer to generate the ttl/cmos output. data slicer the data slicer converts the baseband analog signal from the diode detector to a cmos/ttl compatible output. because the data slicer is ac coupled to the audio output, there is a minimum data rate. ac coupling also limits the minimu m and maximum pulse width. typically, data is encoded on the transmit side using pulse-width modul ation (pwm) or non-return-to zero (nrz). the most common source for nrz data is fr om a uart embedded in a micro-controller. applications that use nrz data encoding ty pica lly inv o lv e microcontrollers. refer to the rcr- xxx-hp designer?s guide for more information on using nrz data encoding. the most common source for pwm data is from a remote control ic such as the hc-12e from holtek. data is sent as a constant ra te square-wave. the duty cycle of that square wave will generally be either 33% (a zero) or 66% (a one). the data s licer on the rcr-xxx-hp is optimized for use with pwm encoded data, though it will work with nrz dat a if certain encoding rules are followed. the data slicer is designed to drive one(1) ttl or cmos load. a buffer must be used if the data output is going to drive more than one ttl/cmo s load or if the load is a lower-impedence (<100k). pow e r supply the rcr-xxx-hp is designed to operate from a 5v pow er supply. it is crucial that this power supply be very quiet. the power supply should be bypassed using a 0.01uf low-esr ceramic capacitor and a 4.7 - 3 - 11/30/2004
rcr-xxx-hp super-het ask/ook receiver data sheet - 4 - 11/30/2004 antenna input pin 1 is a 50 ohm antenna input. it will support most antenna types, including printed antennas integrated directly onto the pcb. if a trace is longer than 1/8 th the wavelength of the frequency it is carrying, it should be a 50 ohm microstrip. ordering information product order code RCR-315-HP RCR-315-HP rcr-418-hp rcr-418-hp rcr-433-hp rcr-433-hp radiotronix inc. 207 industrial blvd. moore, ok 73044 (405) 794-7730 (405) 794-7477 (fax) www.radiotronix.com sales@radiotronix.com
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