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QFMR5-434-128 Datasheet(PDF) 2 Page - rfsolutions.ltd |
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QFMR5-434-128 Datasheet(HTML) 2 Page - rfsolutions.ltd |
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2 / 6 page  FM Radio Transmitter & Receiver Modules T5 / R5 DS305_2 April 01 © ©2001 REG No 277 4001, England. Page 2 Connection Diagram T5 1 2 3 4 5 Figure 1: Transmitter Pin Description: RF GND (pin 1) RF ground pin, internally connected to pin 4 (0V). This pin should ideally be connected to the nearest ground plane (e.g. coax braid, main PCB ground plane etc.) RF OUT (pin2) 50 Ω RF antenna output. To achieve best results the antenna impedance must match that of the module. VCC (pin 3) +Ve supply pin (3.0 to 9.0 volts). The module will generate RF when VCC is present. It is strongly recommended that a 100nF capacitor decouples the supply rail as close as possible to this pin. GND (pin 4) Supply and data ground connection, connected to pin 1. Data IN (pin 5) This input has an impedance of 47K Ω and should ideally be driven by a CMOS logic drive or compatible. The drive circuitry should be supplied with the same supply voltage as the Tx module. Ordering Information: Part No Description QFMT5-434-5V Transmitter 433.92MHz 5v QFMT5-434-3V Transmitter 433.92MHz 3v QFMT5-434-128 Transmitter 433.92MHz 5v 128Kbps Data rate Figure 2: Receiver RF IN (pin 1) 50 RF input from antenna, connect using shortest possible route. This input is isolated from the internal circuit using the air gap of the front end SAW RF filter RF GND (pin 2) RF ground connection, preferable connected to a solid plane. RSSI (pin 3) The Received Signal Strength Indicator provides a DC output voltage proportional to the RF input signal. The amplitude of the RSSI voltage increases with increasing RF signal strength. GND (pin 4) Connect to power supply ground. VCC (pin 5) +Ve supply pin. Operation from a 5V supply able to source6mA at less than Vp-p ripple. AF (pin 6) Audio frequency output. DATA OUT (pin 7) CMOS compatible output. This may be used to drive external decoders. Part No Description QFMR5-434-15 Receiver 433.92MHz 15Kbps Data rate QFMR5-434-50 Receiver 433.92MHz 50Kbps Data rate QFMR5-434-128 Receiver 433.92MHz 128Kbps Data rate Quasar R 5 1 2 3 4 5 6 7 |
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