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RX1-161.975-10 Datasheet(PDF) 2 Page - Radiometrix Ltd |
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RX1-161.975-10 Datasheet(HTML) 2 Page - Radiometrix Ltd |
2 / 19 page Radiometrix Ltd., TX1 & RX1 Data Sheet page 2 Functional description The TX1 module is a two stage crystal controlled NBFM transmitter operating between 2.2V and 12V at a current of 9.5mA. At 3V supply it delivers nominally +10dBm RF output. The SIL style TX1 measures 32 x 12 x 3.8 mm excluding the pins. The RX1 module is a single conversion NBFM superhet receiver capable of handling data rates of up to 10kbps. It will operate from a supply of 2.7V to 12V and draws 12mA when receiving. A signal strength (RSSI) output with greater than 80dB of range is provided. The SIL style RX1 measures 48 x 17.5 x 5.5 mm excluding the pins. TX1 transmitter Lowpass filter PA Bandpass filter x2 VCXO 7kHz LPF 100k Supply regulator 1 RF gnd 2 RF out 3 RF gnd 4 En 5 Vcc 6 0V 7 TXD En (pin 4) Tx enable. ≤0.15V on this pin disables module (current <1µA), ≥1.7V enables module. Input impedance 1M Ω approx. Observe slew rate requirements (see applications notes). Vcc (pin 5) DC +ve supply. Max ripple content 0.1VP-P. Decoupling is not generally required. 0V (pin 6) DC supply ground. Internally connected to pins 1, 3 and module screen. TXD (pin 7) DC-coupled modulation input. Accepts serial digital data at 0V to 3V levels. See applications notes for suggested drive methods. Input impedance 100k Ω nominal. Fig.2: TX1 physical dimensions Pin description RF gnd (pins 1 & 3) RF ground, internally connected to the module screen and pin 6 (0V). These pins should be directly connected to the RF return path - e.g. coax braid, main PCB ground plane etc. RF out (pin 2) 50 Ω RF output to antenna. Internally DC-isolated. See antenna section of applications notes for details of suitable antennas / feeds. Fig.1: TX1 block diagram 3.8 mm 32 mm 12.0 mm 12.5 mm PCB level Radiometrix TX1 pin spacing: 2.54 mm 7 holes of 0.7 mm dia. pin spacing 2.54 mm 15.24 mm 1 2 3 4 5 6 7 1 = RF gnd 2 = RF out 3 = RF gnd 4 = En 6 = 0V 7 = TXD 5 = Vcc |
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