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DR4101 Datasheet(PDF) 2 Page - RF Monolithics, Inc |
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DR4101 Datasheet(HTML) 2 Page - RF Monolithics, Inc |
2 / 2 page 315.00 MHz Transmitter Module RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 E-mail: info@rfm.com Page 2 of 2 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 http://www.rfm.com ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. DR4101-121001 Pin Desciptions Pin Name Description 1 VCC 5 TX IN The TX IN pin is connected to the transmitter TXMOD pin through a 4.7 K resistor on the circuit board. Additional series resistance will often be required between the modulation source and the TX IN pin, depending on the desired output power and peak modulation voltage (3.3 K typical for a peak modulation voltage of 3 volts). Saturated output power requires about 450 µA of drive current. Peak output power PO for a 3 Vdc supply is approximately: PO = 4.8*((VTXH - 0.9)/(RM + 4.7)) 2, where P O is in mW, peak modulation voltage VTXH is in volts and external modulation resistor RM is in kilohms This pin must be held low in the receive and sleep modes. Please refer to section 2.9 of the ASH Transceiver Designer's Guide for additional information. 6, 7 GND 8 NC 9 VCC This is the positive supply voltage pin for the module. The operating voltage range is 2.7 to 3.5 Vdc. It is also possible to use Pin 1 as the Vcc input. Please refer to the Pin 1 description above. 10 GND This is the supply voltage return pin. 11 CTR1 CTR1 and CTR0 select the transmit modes. CTR1 high and CTR0 low place the unit in the ASK transmit mode. CTR1 low and CTR0 high place the unit in the OOK transmit mode. CTR1 and CTR0 both low place the unit in the power down (sleep) mode. CTR1 is a high-impedance input (CMOS compatible). An input voltage of 0 to 200 mV is interpreted as a logic low. An input voltage of Vcc - 200 mV or greater is interpreted as a logic high. An input voltage greater than Vcc + 200 mV should not be applied to this pin. This pin must be held at a logic level; it cannot be left unconnected. 12 CTR0 (T/S) “T” =1 for transmission, “S” =0 for sleep mode 13 RFIO RFIO is the RF output pin. A matching circuit for a 50 ohm load (antenna) is implemented on the circuit board between this pin and the transceiver SAW filter transducer. 14 RF GND This pin is the RF ground (return) to be used in conjunction with the RFIO pin. For example, when connecting the module to an external antenna, the coaxial cable ground is connected this pin and the coaxial cable center conductor is connected to RFIO. Da ta I n 3 Vd c App li ca ti on OOK C ir cu i t 1 2 3 4 5 8 9 1 0 1 1 1 2 1 3 1 4 DR 400 0 T / S 7 6 3 .3 k DR4101 Application OOK Circuit Da ta I n 3 Vd c App li ca ti on ASK C ir cu i t DR 400 0 T /S 1 2 3 4 5 8 9 1 0 1 1 1 2 1 3 1 4 7 6 3 .3 k Application ASK Circuit DR4101 |
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