RFM DR4100

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
433.92 MHz
Transmitter
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.
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
433.72
Maximum
Units
434.12
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
12
0.75
RFIO
14
13
mW
tON/tOFF
12/6
µs
VCC
2.7
3.5
Vdc
TA
-20
+65
°C
DR4100 Pin Out
DR4101 Pin Out
RF
GND
mA
DR4100 Outline Drawing
.30
.80
.20
.165
VCC
1
12
CTR0
NC
2
11
CTR1
.10
NC
3
10
GND
NC
4
9
VCC
TX IN
5
8
NC
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.
.70
E-mail: [email protected]
http://www.rfm.com
DR4100-121001
Page 1 of 2
433.92 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
Circuit
AApplication
p p lic a t i oOOK
n OO
K C i r c u it
T /S
3 Vdc
T /S
12
Circuit
AApplication
p p lic a t i oASK
n AS
K C irc u it
11
10
9
12
8
13
11
4
8
7
14
6
3
9
D
R 4000
DR4100
14
2
10
13
7
D R 4000
DR4100
1
3 Vdc
1
5
6
2
3
4
5
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.
D a ta In
3 .3 k
E-mail: [email protected]
http://www.rfm.com
DR4100-121001
Page 2 of 2