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Preliminary
DR4100
* * * * 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 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 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.
433.92 MHz Transmitter Module
Absolute Maximum Ratings Rating
Power Supply and All Input/Output Pins Non-Operating Case Temperature Soldering Temperature (10 seconds)
Value
-0.3 to +4.0 -50 to +100 230
Units
V C C
Electrical Characteristics, 2.4 kbps On-Off Keyed
Characteristic Operating Frequency Data Rate OOK ASK Transmitter Performance (OOK @ 2.4 kbps) Peak Input Current, 3 Vdc Supply Peak Output Power Turn On/Turn Off Time Power Supply Voltage Range Operating Ambient Temperature ITP PO tON/tOFF VCC TA 2.7 -20 0.75 12/6 3.5 +65 12 mA mW s Vdc C Sym fO Notes Minimum 433.72 Typical Maximum 434.12 19.2 115.2 Units MHz kbps
DR4100 Pin Out DR4101 Pin Out
RF GND 14 VCC NC NC NC TX IN 1 2 3 4 5 6 GND 7 GND RFIO 13 12 11 10 9 8 CTR0
DR4100 Outline Drawing
.30 .80 .20 .165 .10
CTR1 GND VCC NC
.70
RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com http://www.rfm.com DR4100-121001
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433.92 MHz
Pin Desciptions Pin 1 Name
VCC
Transmitter Module
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 A 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 8
9 10
GND NC
VCC GND 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. This is the supply voltage return pin. 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. "T" =1 for transmission, "S" =0 for sleep mode
11
CTR1
12
CTR0 (T/S) RFIO
13
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. 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.
14
RF GND
Application n O Circuit A p p lic a t i oOOK O K C i r c u it
Application n A Circuit A p p lic a t i oASK S K C i r c u i t
T /S
3 Vdc
T /S
3 Vdc
12 13
11
10
9
8 7
12 13
11
10
9
8 7
D R 400 DR41000
14 1 2 3 4 5 D a ta In 3 .3k 6
D R 4000 DR4100
14 1 2 3 4 6 5 D a ta In 3 .3 k
RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com http://www.rfm.com DR4100-121001
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