RFM products are now Murata products. DR4101 Designed for Short-Range Wireless Data Communications Supports up to 115.2 kbps Encoded Data Transmissions 3 V, Low Current Operation plus Sleep Mode 315.00 MHz Ready to Use OEM Module Transmitter Module The DR4101 transmitter module is ideal for short-range wireless data applications where robust operation, small size and low power consumption are required. The DR4101 utilizes Muratas TX5001 amplifier- sequenced hybrid (ASH) architecture to achieve this unique blend of characteristics. The transmitter includes provisions for on-off keyed (OOK) and ASK modulation. The transmitter employs SAW filtering to suppress output harmonics, facilitating compliance with FCC 15.249 and similar regulations. The DR4101 includes the TX5001 plus all configuration components in a ready-to-use PCB assembly, excellent for prototyping and intermediate volume production runs. Absolute Maximum Ratings Rating Value Units Power Supply and All Input/Output Pins -0.3 to +4.0 V Non-Operating Case Temperature -50 to +100 C Soldering Temperature (10 seconds) 230 C Electrical Characteristics Characteristic Sym Notes Minimum Typical Maximum Units Operating Frequency f 314.8 315.2 MHz O Data Rate 19.2 kbps OOK ASK 115.2 Transmitter Performance (OOK 2.4 kbps) Peak Input Current, 3 Vdc Supply I 12 mA TP Peak Output Power P 0.75 mW O Turn On/Turn Off Time t /t 12/6 s ON OFF Power Supply Voltage Range V 2.7 3.5 Vdc CC Operating Ambient Temperature T -20 +65 C A DR4101 Pin Out DR4101 Outline Drawing DR4101 Pin Out RF .80 GND RFIO .30 .20 14 13 .165 VCC 1 12 CTR0 NC 2 11 CTR1 .10 NC 3 10 GND .70 NC 4 9 VCC TX IN58 NC 7 6 GND GND 2010-2015 by Murata Electronics N.A., Inc. DR4101 (R) 3/31/15 Page 1 of 2 www.murata.comPin Desciptions Pin Name Description 1VCC 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 resis- tance 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 A of drive current. Peak output power P for a 3 Vdc supply is approximately: O 2 P = 4.8*((V - 0.9)/(R + 4.7)) , where P is in mW, peak modulation voltage V is in volts and external modulation resis- O TXH M O TXH tor R is in kilohms M 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 8NC 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 =1 for transmission, S =0 for sleep mode (T/S) 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. Application OOK Circuit Application ASK Circuit A pplic a tion O O K C irc uit A pp lic a tion A S K C irc u it 3 V d c T/S T/S 3 V d c 12 11 10 9 8 12 11 10 9 8 13 7 13 7 DR4101 D R 4000 DR4101 D R 4000 14 6 14 6 1 2 345 12 34 5 Da ta In Da ta In 3.3k 3.3k 2010-2015 by Murata Electronics N.A., Inc. www.murata.com DR4101 (R) 3/31/15 Page 2 of 2