RX1120 • • • • • Ideal for 303.825 MHz, 3 V Data Receivers in the UK and the USA High-Sensitivity Passive Design with No RF Oscillation Baseband Data Rate of 10 kb/s Simple to Apply with External Parts Count Rugged, Surface-Mount Package with 130 mm2 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 module. 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 spurious emissions. 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 a 3 V lithium battery 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 devices operating in the USA under FCC Part 15, in Australia, in Japan, and in Korea. 303.825 MHz ASH Receiver SM-10 Case Electrical Characteristics Characteristic Operating Radio Frequency Sym fC Received Carrier Modulation Type RF Band 4, 5 Input Impedance 6 half-Frequency Spurious Data Rate Default (Terminal 5 NC) Power Supply W 105 dB 20 700 ns 250 kHz 20 kbps 24 kHz 25 10 Override (Terminal 5 LOW) mV 0 CMOS Load Capacitance 10 Output HIGH Voltage VOH Output LOW Voltage VOL 11 VCC -0.2 VCC 0.0 0.2 Rise Time tR 3 Fall Time tF 3 Operating Voltage VCC Current at 25C and 3.0 V ICC Operating Ambient Temperature TA Lid Symbolization (in addition to Lot and/or Date Codes) RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. 1 1 2.7 dBm kHz 50 Nominal 9 3 dB Bandwidth Digital Output fC±200 8 Sample Repetition Rate Comparator Threshold -10 7 Sample Duration Units MHz Pulse Modulation (OOK) ZIN fC ±1 MHz Baseband Typical Maximum 303.825 Nominal -92 Channel Width Sequencing (Sampling) Minimum Sensitivity Operating Signal Strength Interference Rejection Notes 2, 3 pF V µs 3.0 3.5 VDC 1.3 1.4 mA +85 °C -40 RFM RX1120 E-mail: [email protected] http://www.rfm.com RX1120-111199 Page 1 of 4 The RX Series SMT Hybrid ASH Receivers 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 the 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 included in the ASH receiver). 6. These parameters apply over the absolute minimum operating passband which is referenced to fC. 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 eliminates noise output when there is no RF signal. The override threshold (with terminal 5 connected to ground) is optimized for continuous data. 11. The ASH receiver is designed to drive a single CMOS load. 12. For ESD protection. Absolute Maximum Ratings Rating Value Incident RF Power Power Supply Voltage (VCC to Ground) (Observe ESD Precautions) ESD (100 pF, 1.5 kΩ) Units +10 dBm -0.3 to +4.0 VDC Terminals 2, 3, or 7 to Ground ±2000 All Other Terminals to Ground ±300 V -40 to +100 Case Temperature °C Block Diagram and Electrical Connections 50 ohm Antenna Note 12 10 9 8 7 RF Input Gnd Gnd Data Output 6 Voltage Reference 1 uF Top View Pulse Generator RF Amp. SAW Delay Line RF Amp. AM Detector LPF SAW BPF Comparator Baseband Output 2 Vcc 1 +3V Comparator Input 3 Gnd 4 Threshold Override 5 10 uF 0.1 to 10 uF RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com RX1120-111199 Page 2 of 4 The RX Series SMT Hybrid ASH Receivers Demonstration Circuit + 1 Vcc Note 12 RF In 10 +3V Lithium CR2032 1 16 2 15 10 uF 2 BB Out Gnd 9 3 3 Comp In Gnd 8 4 Data Out 7 5 + .1 to 1uF 4 Gnd 5 Thres Override OPEN: Default 25mV CLOSED: Override OV Vref 6 6 + 1 uF 33 K + 7 MC145028 Decoder Top View 14 13 1 mA @ 3VDC RS 273-065A or equiv 12 + Piezo 11 Alarm 10 0.1 uF 0.1 uF + 620 K 8 9 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 other modulation or codes typically result in significantly better rejection performance. 0 Spurious Rejection Relative to Passband Sensitivity (dB) 0 10 10 20 20 30 30 40 40 50 50 60 60 70 70 80 80 90 90 100 100 110 110 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560 580 600 620 640 216.96 Half Freq. Spurious Response 433.92 Operating Freq. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. Frequency (MHz) E-mail: [email protected] http://www.rfm.com RX1120-111199 Page 3 of 4 The RX Series SMT Hybrid ASH Receivers Case Design 0.370 (9.40) 0.065 (1.65) 10 Places 0.050 (1.27) 10 Places 0.070 (1.78) 4 Places RFM Rxxxxx 0.540 (13.72) 0.241 (6.12) 0.10 (2.54) 0.100 (2.54) 4 Places Typical Antennas A B C D 50 Ω Ground Plane Enameled Wire, AWG = G Inner Dia = E No. Turns = F Frequency Dimensions A B C D E F G Units Inches Millimeters Inches Millimeters Inches Millimeters Inches Millimeters Inches Millimeters Number of Turns AWG 303.825 418.0 433.92 916.5 5.35 135.89 1.0 25.4 0.25 6.35 3.7 93.98 0.375 9.53 3.9 99.06 0.6 15.24 0.6 15.24 2.7 68.58 0.1 2.54 3.55 90.17 0.6 15.24 0.55 13.97 2.4 60.96 0.1 2.54 1.58 40.13 0.4 10.16 0.18 4.57 1.0 25.4 0.1 2.54 4T 16T 15T 7T #20 #22 #22 #24 RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com RX1120-111199 Page 4 of 4