Preliminary 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 Ready to Use OEM Module 315.00 MHz 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 RFM’s TX5001 amplifiersequenced 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 230 °C Soldering Temperature (10 seconds) Electrical Characteristics, 2.4 kbps On-Off Keyed Characteristic Sym fO Operating Frequency Data Rate Notes Minimum Typical 314.8 Maximum Units 315.2 MHz OOK 19.2 kbps ASK 115.2 Transmitter Performance (OOK @ 2.4 kbps) Peak Input Current, 3 Vdc Supply ITP Peak Output Power PO Turn On/Turn Off Time Power Supply Voltage Range Operating Ambient Temperature RFIO 14 13 mA 0.75 mW tON/tOFF 12/6 µs VCC 2.7 3.5 Vdc TA -20 +65 °C DR4101 Pin Out DR4101 Pin Out RF GND 12 DR4101 Outline Drawing .30 VCC 1 12 CTR0 NC 2 11 CTR1 NC 3 10 GND NC 4 9 VCC TX IN 5 8 NC .80 .20 .165 .10 .70 6 7 GND GND RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com DR4101-121001 Page 1 of 2 315.00 MHz Transmitter Module Pin Desciptions Pin Name 1 VCC Description 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: 5 TX IN PO = 4.8*((VTXH - 0.9)/(RM + 4.7))2, where PO 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) 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. “T” =1 for transmission, “S” =0 for sleep mode OOK AApplication p p lic a t i o n O OCircuit K C i r c u it 3 Vdc T /S 12 11 13 10 9 T /S 8 12 7 DR4101 D R 4000 3 4 10 9 13 6 2 11 3 Vdc 8 7 DR4101 D R 4000 14 1 Application ASK Circuit A p p lic a t i o n A S K C i r c u i t 14 5 1 6 2 3 4 5 D a ta In D a ta In 3 .3k RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. 3 .3 k E-mail: [email protected] http://www.rfm.com DR4101-121001 Page 2 of 2