11-103
11
Product Description
Ordering Information
Typical Applications
Features
Functional Block Diagram
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Optimum Technology Matching® Applied
Si BJT
GaAs MESFET
GaAs HBT
Si Bi-CMOS
ü
SiGe HBT
Si CMOS
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Q SIG
Q REF
GND1
NC
LO IN+
LO IN-
NC
VCC1
GND2
VCC2
INSTGT
APC
I SIG
I REF
NC
GND6
GND5
RF OUT
GND4
GND3
PLLON
TX PD
PC 2
PC1
+45°
-45°
Σ
DC
BIAS
PWR
CTRL
RF2909
3V 915MHZ SPREAD-SPECTRUM
TRANSMITTER IC
• Direct Sequence Spread Spectrum
• Spread Spectrum Cordless Phones
• Portable Battery Powered Equipment
• GMSK, QPSK, DQPSK, QAM Modulation
• 915MHz ISM Applications
The RF2909 is a monolithic integrated transmitter IC
capable of universal direct modulation. The quadrature
modulator allows for a variety of modulation formats and
compound carriers. The transmitter has two power control
modes. Two inputs can be controlled digitally for stepping
output power 1mW, 10 mW, or 70mW output power. Or,
the output level can be adjusted by an analog input from
1 mW to 80 mW. The quadrature mixers have differential
inputs, and are internally biased; a DC blocking capacitor
is required if external DC levels are present. The LO is
split with a passive network tuned for 915MHz.
• 2.7V to 5V Power Supply
• 1mW, 10mW, 70mW Digital Output
Power
• 20dB Analog Power Control Range
• Excellent Phase & Amplitude Balance
• Compatible with the RF2908
RF2909
3V 915MHz Spread-Spectrum Transmitter IC
RF2909 PCBA
Fully Assembled Evaluation Board
11
Rev B1 010904
.069
.053
.050
.016
8°MAX
0°MIN
.010
.008
.157
.150
.244
.228
1
.344
.337
.012
.008
.025
.010
.004
.033
Package Style: SSOP-24
New Zealand ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
