RF2915 RF Micro Devices, RF2915 Datasheet
RF2915
Related parts for RF2915
RF2915 Summary of contents
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... Keyless Entry Systems • 433MHz/868MHz/915MHz ISM Band Product Description The RF2915 is a monolithic integrated circuit intended for use as a low cost FM transceiver. The device is provided in 32-lead plastic TQFP packaging and is designed to be used with a PLL IC to provide a fully functional FM trans- ceiver ...
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... RF2915 Absolute Maximum Ratings Parameter Supply Voltage Control Voltages Input RF Level Output Load VSWR Operating Ambient Temperature Storage Temperature Parameter Overall RF Frequency Range VCO and PLL Section VCO Frequency Range VCO OUT Impedance VCO OUT Level VCO/PLL Phase Noise Transmit Section ...
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... MHz 60 dB 330 kHz V -0 RF2915 Condition 433MHz 915MHz 433MHz 915MHz 433MHz 915MHz 433MHz 915MHz RX ENABL=“1”, TX ENABL=“0” RX Mode 433MHz/915MHz Single-ended configuration 433MHz 915MHz 433MHz 915MHz 433MHz 915MHz 433MHz 915MHz Balanced IF=10 ...
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... RF2915 Parameter Power Down Control Logical Controls “ON” Logical Controls “OFF” Control Input Impedance Turn On Time Turn Off Time and Time Power Supply Voltage Current Consumption 11 11-114 Specification Unit Min. Typ. Max. 2.0 1.0 25k 100 3.6 2.7 to 5.0 2 ...
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... The output voltage range is 0.5V to 2.3V and increases with increasing signal strength. 13 IF1 IN IF input to the 40dB limiting amplifier strip. A 10nF DC blocking capaci- tor is required on this input. Rev A7 001011 impedance image filters. termina- RF2915 Interface Schematic ENABL OUT ...
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... RF2915 Pin Function Description 14 IF1 BP+ DC feedback node for the 40dB limiting amplifier strip. A 10nF bypass capacitor from this pin to ground is required. 15 IF1 BP- Same as pin 14. 16 IF1 OUT IF output from the 40dB limiting amplifier. The IF1 OUT output presents a nominal 330 ceramic filters ...
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... Low High High High PLL Lock * LVL ADJ pin must be low to disable transmitter. Rev A7 001011 or greater. When using a RF2915 transmitter and nd IF amplifier, Demodulator and Function Entire chip is powered down. Total current consumption is < Transmitter, VCO are on. Receiver, VCO are on. * VCO is on ...
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... This eliminates the need for a TX/RX switch, and allows for a single RF filter to be used in transmit and receive modes. Separate access to the PA and LNA allows the RF2915 to inter- face with external components such as a high power PA, lower NF LNA, upconverters, and downconverters, 11 for a variety of implementations ...
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... Figure 1. Recommended VCO Layout For the interface between the LNA/mixer, the coupling capacitor should be as close to the RF2915 pins as possible, with the bias inductors further away. Once again, the value of the inductor may be changed to compensate for trace inductance. The output imped- ...
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... Note that LVL ADJ needs to be held low for PLL- only mode. Sometimes desirable to ramp up the power amplifier to minimize load pulling on the VCO this with the RF2915, first put the RF2915 into 11 PLL mode by putting TX ENABL and RX ENABL high. ...
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... TX ENABL 1 TX OUT 2 GND2 GND1 5 LNA OUT 6 GND3 7 MIX IN 8 Rev A7 001011 Pin Out RF2915 24 RESNTR+ 23 MOD IN 22 IF2 OUT 21 DEMOD IN 20 GND6 19 IF2 BP- 18 IF2 BP+ 17 IF2 IN 11-121 11 ...
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... RF2915 DATA OUT LVL ADJ RX ENABL TX ENABL 100 pF 915 MHz SAW 100 11-122 915 MHz Application Schematic Control 1 Gain Logic Control 2 PA ...
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... L7* CLK TBD R27 12 k R28 R29 DB9 R24 R25 R26 P1-1 V (RF2915 GND P3 P1 (LMX2315) PLL 1 GND P3 ENABL P2 P3 ENABL P2-1 1 LVL ADJ GND P4-1 RSSI P3 ...
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... RF2915 Same board layout is used for the -L, -M, and -H versions 11 11-124 Evaluation Board Layout Board Size 3.070" x 3.670" Rev A7 001011 ...
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... Rev A7 001011 RF2915 11 11-125 ...
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... RF2915 11 11-126 Rev A7 001011 ...
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... Icc(868) 25.0 0.0 20.0 -5.0 15.0 -10.0 10.0 -15.0 5.0 -20.0 3.0 3.5 4.0 0.0 0.5 1.0 30.0 9.0 Icc (433) Icc (868) Icc (905) 25.0 8.0 20.0 7.0 15.0 6.0 10.0 5.0 5.0 4.0 3.0 3.5 4.0 2.5 3.0 RSSI Output versus Temperature 2.5 -40°C 10°C 25°C 40°C 2.0 85°C 1.5 1.0 0.5 0.0 -60.0 -50.0 -40.0 -130.0 -110.0 RF2915 versus Level Adjust CC at 868MHz, 3. 30.0 25.0 20.0 15.0 10.0 5.0 1.5 2.0 2.5 3.0 3.5 4.0 LVL ADJ (V) Receive Current versus V CC (including LMX2315 IC) 3.5 4.0 4.5 5.0 5.5 Supply Voltage ( 2.4V CC -90.0 -70.0 -50.0 -30.0 -10.0 10.0 Received Signal Strength (dBm) 11-127 11 ...
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... RF2915 11 11-128 Rev A7 001011 ...