
11-103
11
T
Produc t Desc ription
Ordering Information
Typic al Applic ations
Features
Func tional 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 HBT
Si Bi-CMOS
SiGe HBT
GaAs MESFET
Si CMOS
SeeUpgradedProductRF2942
12
13
APC
PC1
1
2
3
4
5
6
7
8
9
10
11
24
23
22
21
20
19
18
17
16
15
14
Q SIG
Q REF
GND1
NC
LO IN+
LO IN-
NC
VCC1
GND2
VCC2
INSTGT
I SIG
I REF
NC
GND6
GND5
RF OUT
GND4
GND3
PLLON
TX PD
PC 2
+45°
-45°
Σ
DC
BIAS
PWR
CTRL
RF2909
3V 915 MHZ S PR EAD-S PECTR UM
TR ANS MIT T ER 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, 10mW, or 70mW output power. Or,
the output level can be adjusted by an analog input from
1mW to 80mW. 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
RF2909 PCBA
3V 915MHz Spread-Spectrum Transmitter IC
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 S tyle: S S OP-24