RX1020 433.92 mhz ash receiver rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 1 of 4 http://www.rfm.com ?1998 by rf monolithics, inc. the stylized rfm logo and rfm are registered trademarks of rf monolithics, inc. RX1020-121198 ? ideal for 433.92 mhz, 3 v receivers in europe (i-ets 300 220) ? high-sensitivity passive design with no rf oscillation ? baseband data rate of 20 kbps ? simple to apply with external parts count ? rugged, surface-mount package with 130 mm 2 footprint this amplifier-sequenced hybrid (ash) receiver is based on several leading-edge technologies that allow outstanding performance in a small and simple-to-apply mod- ule. two surface-accoustic-wave (saw) devices are employed. front-end filtering by a low-loss coupled-resonator saw filter provides excellent selectivity. typical sensitivity better than -92 dbm is achieved with no rf oscillating or regenerative circuits. this results in virtually no rf spu rious emis- sions. a low-loss saw delay line provides the time delay necessary to sequence the two rf amplifiers. time sequencing of the rf gain eliminates the need for frequency conversion prior to am detection. this receiver is designed to operate from 3 v lithium batter y with typically 1.3 ma current. for system design flexibility, the baseband output is accessible, and the comparator threshold can be changed externally between two settings. typical applications include unlicensed wireless remote-controls, security and data-link device s oper- ating in europe under etsi i-ets 300 220. electrical characteristics characteristic sym notes minimum typical maximum units operating radio frequency f c 2, 3 433.92 nominal mhz received carrier modulation type 4, 5 pulse modulation (ook) rf band sensitivity 6 -92 dbm operating signal strength -10 channel width f c 200 khz input impedance z in 50 nominal w interference rejection half-frequency spurious 7 105 db f c 1 mhz 20 sequencing (sampling) sample duration 8 700 ns sample repetition rate 250 khz baseband data rate 9 20 kb/s 3 db bandwidth 24 khz comparator threshold default (terminal 5 nc) 10 25 mv override (terminal 5 low) 0 digital output cmos load capacitance 11 10 p f output high voltage v oh v cc -0.2 v cc v output low voltage v ol 0.0 0.2 rise time t r 3 s fall time t f 3 power supply operating voltage v cc 1 2.7 3.0 3.5 vdc current at 25c and 3.0 v i cc 1.3 1.4 ma operating ambient temperature t a 1 -40 +85 c lid symbolization (in addition to lot and/or date codes) rfm RX1020 sm-10 case
the rx series smt hybrid ash receivers rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 2 of 4 http://www.rfm.com ?1998 by rf monolithics, inc. the stylized rfm logo and rfm are registered trademarks of rf monolithics, inc. RX1020-121198 caution: electrostatic sensitive device. observe precautions for handling. notes: 1. unless noted otherwise, specifications apply over the entire specified operating temperature and voltage ranges. 2. one or more of the following united states patents apply: 4,454,488; 4,616,197; 4,749,964; 4,902,925. other patents are pending. 3. typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of th e equipment manufacturer. 4. the design, manufacturing process, and specifications of this device are subject to change without notice. 5. a variety of on-off-keyed (ook) pulse modulation schemes are possible since digital decoding is an external function (not includ ed in the ash receiver). 6. these parameters apply over the absolute minimum operating passband which is referenced to f c . 7. with interfering signal matched to the receiver modulation and code. see ?typical modulated interference rejection? for a more detailed view. 8. sample repetition rates greater than 1 mhz are available in custom versions. contact rfm for details. 9. baseband data rates are available to 20 kbps, respectively, in custom versions. contact rfm for details. see hx/rx designer?s guide for details on data rate limits. 10. the default comparator threshold (with terminal 5 not connected) is optimized for low duty-cycle, or ?bursty? data and eliminate s noise output when there is no rf signal. the override threshold (with terminal 5 connected to ground) is optimized for continuou s data. 11. the ash receiver is designed to drive a single cmos load. 12. for esd protection block diagram and electrical connections absolute maximum ratings rating value units incident rf power +10 dbm power supply voltage (v cc to ground) (observe esd precautions) -0.3 to +4.0 vdc esd (100 pf, 1.5 k w ) terminals 2, 3, or 7 to ground 2000 v all other terminals to ground 300 case temperature -40 to +100 c t o p v i e w 50 ohm antenna +3v 10 uf 0.1 to 10 uf 1 uf pulse gen- erator saw delay line lpf rf amp. rf amp. saw bpf comparator am detector 10 9 8 7 6 5 4 3 2 1 rf input gnd gnd data output voltage reference vcc baseband output comparator input gnd threshold override note 12
the rx series smt hybrid ash receivers rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 3 of 4 http://www.rfm.com ?1998 by rf monolithics, inc. the stylized rfm logo and rfm are registered trademarks of rf monolithics, inc. RX1020-121198 demonstration circuit typical modulated interference rejection (433.92 mhz rx1000 shown) this plot is for an interfacing signal modulated with the receiver?s modulation and code. continuous wave (cw) or signals with o ther modulation or codes typically result in significantly better rejection performance. + + 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 + piezo alarm 620 k 0.1 uf 33 k 0.1 uf 1 ma @ 3vdc rs 273-065a or equiv + + + +3v lithium cr2032 1 uf open: default 25mv closed: override ov .1 to 1uf 10 uf 1 vcc 2 bb out 3 comp in 4 gnd 5 thres override rf in 10 gnd 9 gnd 8 data out 7 vref 6 top view m c 1 4 5 0 2 8 d e c o d e r note 12 433.92 operating freq. 216.96 half freq. spurious response frequency (mhz) spurious rejection relative to passband sensitivity (db) 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560 580 600 620 640 120 0 10 20 30 40 50 60 70 80 90 100 110 0 10 20 30 40 50 60 70 80 90 100 110
the rx series smt hybrid ash receivers rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 4 of 4 http://www.rfm.com ?1998 by rf monolithics, inc. the stylized rfm logo and rfm are registered trademarks of rf monolithics, inc. RX1020-121198 case design typical antennas dimensions units frequency 303.825 418.0 433.92 916.5 a inches 5.35 3.9 3.55 1.58 millimeters 135.89 99.06 90.17 40.13 b inches 1.0 0.6 0.6 0.4 millimeters 25.4 15.24 15.24 10.16 c inches 0.25 0.6 0.55 0.18 millimeters 6.35 15.24 13.97 4.57 d inches 3.7 2.7 2.4 1.0 millimeters 93.98 68.58 60.96 25.4 e inches 0.375 0.1 0.1 0.1 millimeters 9.53 2.54 2.54 2.54 f number of turns 4t 16t 15t 7t g awg #20 #22 #22 #24 0.10 (2.54) 0.370 (9.40) 0.540 (13.72) 0.241 (6.12) 0.050 (1.27) 10 places 0.100 (2.54) 4 places 0.065 (1.65) 10 places 0.070 (1.78) 4 places rfm rxxxxx inner dia = e no. turns = f enameled wire, awg = g a b c d ground plane 50 w
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