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PDF RF2915 Data sheet ( Hoja de datos )
| Número de pieza | RF2915 | |
| Descripción | 433/868/915MHZ FSK/ASK/OOK TRANSCEIVER | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RF2915 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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11
Typical Applications
• Wireless Meter Reading
• Keyless Entry Systems
• 433MHz/868MHz/915MHz ISM Band
RF2915
433/868/915MHZ FSK/ASK/OOK
TRANSCEIVER
• Wireless Data Transceiver
• Wireless Security Systems
• Battery-Powered Portable Devices
Product Description
The RF2915 is a monolithic integrated circuit intended for
use as a low cost FM transceiver. The device is provided
in 32-lead plastic TQFP packaging and is designed to be
used with a PLL IC to provide a fully functional FM trans-
ceiver. The chip is intended for digital (ASK, FSK, OOK)
applications in the North American 915MHz ISM band
and European 433MHz/868MHz ISM band. The inte-
grated VCO has a buffered output to feed the RF signal
back to the PLL IC to form the frequency synthesizer.
Internal decoding of the RX ENABL and TX ENABL lines
allow for half-duplex operation as well as turning on the
VCO to give the synthesizer time to settle and complete
power down mode.
7.00
+ 0.20 sq.
0.22
+ 0.05
-A-
0.15
0.05
0.50
5.00
+ 0.10 sq.
7° MAX
0° MIN
1.40
+ 0.05
Dimensions in mm.
0.60
+ 0.15
0.10
0.127
Optimum Technology Matching® Applied
üSi BJT
GaAs HBT
GaAs MESFET
Si Bi-CMOS
SiGe HBT
Si CMOS
TX ENABL 1
TX OUT 2
32
CONTROL
LOGIC
PA
31
29 26 25
24 RESNTR-
23 MOD IN
RX IN 4
LNA OUT 6
MIX IN 8
LNA
Linear
RSSI
10
11 12
13 14
15 16
21 DEMOD IN
22 IF2 OUT
19 CBP2-
18 CBP2+
17 IF2 IN
Functional Block Diagram
Package Style: LQFP-32_5x5
Features
• Fully Monolithic Integrated Transceiver
• 2.4V to 5.0V Supply Voltage
• Narrowband and Wideband FSK
• 300MHz to 1000MHz Frequency Range
• 10dB Cascaded Noise Figure
• 10mW Output Power With Power Control
11
Ordering Information
RF2915
433/868/915MHz FSK/ASK/OOK Transceiver
RF2915 PCBA-L Fully Assembled Evaluation Board (433MHZ)
RF2915 PCBA-M Fully Assembled Evaluation Board (868MHZ)
RF2915 PCBA-H Fully Assembled Evaluation Board (915MHz)
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Rev A7 001011
11-111
1 page  
RF2915
Pin Function Description
Interface Schematic
1 TX ENABL Enables the transmitter circuits. TX ENABL>2.0V powers up all trans-
mitter functions. TX ENABL<1.0V turns off all transmitter functions
except the PLL functions.
TX ENABL
20 kΩ
40 kΩ
2 TX OUT RF output pin for the transmitter electronics. TX OUT output impedance
is a low impedance when the transmitter is enabled. TX OUT is a high
impedance when the transmitter is disabled.
3
GND2
Ground connection for the 40 dB IF limiting amplifier and Tx PA func-
tions. Keep traces physically short and connect immediately to ground
plane for best performance.
4
RX IN
RF input pin for the receiver electronics. RX IN input impedance is a
low impedance when the transmitter is enabled. RX IN is a high imped-
ance when the receiver is disabled.
VCC
20
TX OUT
RX IN
500
5
GND1
Ground connection for RF receiver functions. Keep traces physically
short and connect immediately to ground plane for best performance.
6 LNA OUT Output pin for the receiver RF low noise amplifier. This pin is an open
collector output and requires an external pull up coil to provide bias and
tune the LNA output. A capacitor in series with this output can be used
to match the LNA to 50Ω impedance image filters.
7
GND3
Same as pin 3.
8
MIX IN
RF input to the RF Mixer. An LC matching network between LNA OUT
and MIX IN can be used to connect the LNA output to the RF mixer
input in applications where an image filter is not needed or desired.
VCC
MIX IN
LNA OUT
GND5
9
GND5
GND5 is the ground connection shared by the input stage of the trans-
mit power amplifier and the receiver RF mixer.
10
MIX OUT IF output from the RF mixer. Interfaces directly to 10.7MHz ceramic IF
MIX OUT
filters as shown in the application schematic. A pull-up inductor and
series matching capacitor should be used to present a 330Ω termina-
tion impedance to the ceramic filter. Alternately, an IF tank can be used
to tailor the IF frequency and bandwidth to meet the needs of a given
15 pF
15 pF
application.
GND5
GND5
11 VREF IF DC voltage reference for the IF limiting amplifiers. A 10nF capacitor .
from this pin to ground is required.
12
RSSI
A DC voltage proportional to the received signal strength is output from
this pin. The output voltage range is 0.5V to 2.3V and increases with
increasing signal strength.
VCC
RSSI
13
IF1 IN
IF input to the 40dB limiting amplifier strip. A 10nF DC blocking capaci-
tor is required on this input.
IF1 BP+
60 kΩ
IF1 BP-
60 kΩ
330
IF1 IN
330
11
Rev A7 001011
11-115
5 Page 
Pin Out
RF2915
32 31 30 29 28 27 26 25
TX ENABL 1
24 RESNTR+
TX OUT 2
23 MOD IN
GND2 3
22 IF2 OUT
RX IN 4
21 DEMOD IN
GND1 5
20 GND6
LNA OUT 6
19 IF2 BP-
GND3 7
18 IF2 BP+
MIX IN 8
17 IF2 IN
9 10 11 12 13 14 15 16
11
Rev A7 001011
11-121
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet RF2915.PDF ] | |
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