RF2480
5
Typical Applications
• Dual-Band CDMA Base Stations
• TDMA/TDMA-EDGE Base Stations
• GSM-EDGE/EGSM Base Stations
• W-CDMA Base Stations
• WLAN and WLL Systems
• TETRA Systems
DIRECT QUADRATURE MODULATOR
Product Description
The RF2480 is a monolithic integrated quadrature modu-
lator IC capable of universal direct modulation for high-
frequency AM, PM, or compound carriers. This low-cost
IC features excellent linearity, noise floor, and over-tem-
perature carrier suppression performance. The device
implements differential amplifiers for the modulation
inputs, 90° carrier phase shift network, carrier limiting
amplifiers, two matched double-balanced mixers, sum-
ming amplifier, and an output RF amplifier which will drive
50Ω from 800MHz to 2500MHz. Component matching is
used to obtain excellent amplitude balance and phase
accuracy.
0.157
0.150
-A-
0.008
0.004
5
MODULATORS AND
UPCONVERTERS
0.393
0.386
0.018
0.014
0.050
0.244
0.229
8° MAX
0° MIN
0.009
0.007
0.068
0.053
NOTES:
1. Shaded lead is Pin 1.
2. All dimensions are excluding
mold flash.
3. Lead coplanarity - 0.005 with
respect to datum "A".
0.034
0.016
Optimum Technology Matching® Applied
Si BJT
Si Bi-CMOS
ü
GaAs HBT
SiGe HBT
Package Style: SOIC-16
GaAs MESFET
Si CMOS
Features
• Typical Carrier Suppression>35dBc over
I S IG
Q S IG
GND1
GND1
GND1
VCC2
GND1
RF OUT
I REF
Q REF
GND2
GND2
GND2
LO
VCC1
PD
1
2
3
4
5
6
7
8
POW ER
CONTROL
16
15
14
temperature with highly linear operation
• Single 5V Power Supply
• Integrated RF quadrature network
• Digitally controlled Power Down mode
• 800MHz to 2500MHz operation
Σ
13
12
11
10
9
-4 5 °
+45°
Ordering Information
RF2480
RF2480 PCBA
Direct Quadrature Modulator
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
Rev A3 011019
5-29
RFMD [ RF MICRO DEVICES ]
