RF2909 Ver la hoja de datos (PDF) - RF Micro Devices
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RF2909 Datasheet PDF : 8 Pages
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11
Typical Applications
• Direct Sequence Spread Spectrum
• Spread Spectrum Cordless Phones
• Portable Battery Powered Equipment
RF2909
3V 915MHZ SPREAD-SPECTRUM
TRANSMITTER IC
• GMSK, QPSK, DQPSK, QAM Modulation
• 915MHz ISM Applications
Product Description
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.
.157
.150
1
.344
.337
.033
.012
.008
.025
.244
.228
8°MAX
0°MIN
.050 .010
.016 .008
.010
.004
.069
.053
Optimum Technology Matching® Applied
Si BJT
üSi Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
Q SIG 1
24 I SIG
Q REF 2
GND1 3
23 I REF
+45°
-45°
22 NC
NC 4
Σ
LO IN+ 5
21 GND6
20 GND5
LO IN- 6
19 RF OUT
NC 7
18 GND4
VCC1 8
17 GND3
GND2 9
VCC2 10
INSTGT 11
APC 12
DC
BIAS
16 PLLON
15 TX PD
PWR
CTRL
14 PC 2
13 PC1
Package Style: SSOP-24
Features
• 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
Ordering Information
RF2909
3V 915MHz Spread-Spectrum Transmitter IC
RF2909 PCBA Fully Assembled Evaluation Board
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
11
Rev B1 010904
11-103
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