DR4100 RFM | Alldatasheet

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Technical content

RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 E-mail: info@rfm.com Page 1 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. DR4100-121001 Electrical Characteristics, 2.4 kbps On-Off Keyed Characteristic Sym Notes Minimum Typical Maximum Units Operating Frequency fO 433.72 434.12 MHz Data Rate OOK 19.2 kbps ASK 115.2 Transmitter Performance (OOK @ 2.4 kbps) Peak Input Current, 3 Vdc Supply ITP 12 mA Peak Output Power P O 0.75 mW Turn On/Turn Off Time tON /t OFF 12/6 µs Power Supply Voltage Range V CC 2.7 3.5 Vdc Operating Ambient Temperature T A -20 +65 °C

  • 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 The DR4100 transmitter module is ideal for short-range wireless data applications where robust operation, small size and low power consumption are required. The DR4100 utilizes RFM’s TX5000 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 ETSI 300 220 and similar regulations. The DR4100 includes the TX5000 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

433.92 MHz

.80 .30 .20 .165 .70 .10 DR4100 Outline Drawing

433.92 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. DR4100-121001 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 P O for a 3 Vdc supply is approximately: P O = 4.8*((V TXH - 0.9)/(R M + 4.7)) 2 , where P O is in mW, peak modulation voltage V TXH is in volts and external modulation resistor R M 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 us e 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. Data In

3 Vdc

3.3k DR4100 Application OOK Circuit Data In 3.3k Application ASK Circuit DR4100