Preliminary
5
Typical Applications
鈥?Dual-Band CDMA Base Stations
鈥?TDMA/TDMA-EDGE Base Stations
鈥?GSM-EDGE/EGSM Base Stations
鈥?W-CDMA Base Stations
鈥?WLAN and WLL Systems
RF2484
DIRECT QUADRATURE MODULATOR
鈥?GMSK,QPSK,DQPSK,QAM Modulation
Product Description
2
1
0.80
TYP
1
The RF2484 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擄 carrier phase shift network, carrier limiting
amplifiers, two matched double-balanced mixers, sum-
ming amplifier, and an output RF amplifier which will drive
50鈩?from 800MHz to 2500MHz. It is packaged in a small
industry-standard LCC 16-pin plastic package.
3.75
0.75
0.50
0.45
0.28
5
1.60 4.00
3.75
+
12擄
1.50 SQ
INDEX AREA 3
3.20
4.00
1.00
0.90
0.75
0.65
NOTES:
1 Shaded Pin is Lead 1.
2
Dimension applies to plated terminal and is measured between
0.10 mm and 0.25 mm from terminal tip.
0.05
0.00
Dimensions in mm.
The terminal #1 identifier and terminal numbering convention
3 shall conform to JESD 95-1 SPP-012. Details of terminal #1
identifier are optional, but must be located within the zone
indicated. The identifier may be either a mold or marked
feature.
4
5
Pins 1 and 9 are fused.
Package Warpage: 0.05 max.
Optimum Technology Matching廬 Applied
Si BJT
Si Bi-CMOS
眉
GaAs HBT
SiGe HBT
QREF
Package Style: LCC, 16-Pin
GaAs MESFET
Si CMOS
Features
鈥?Typical Carrier Suppression>35dBc,
Sideband Suppression>35dBc over
temperature with highly linear operation
鈥?Noise Floor better than -152dBm/Hz
from 800MHz to 2200MHz
鈥?Single 5V Power Supply
1
GND 2
16
15
14
13
12 GND
危
GND 3
LO 4
5
GND
6
VCC
-45擄
+45擄
11 GND
10 VCC
7
PD
8
RF OUT
9
GND
QSIG
IREF
GND
ISIG
Ordering Information
RF2484
RF2484 PCBA
Direct Quadrature Modulator
Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Rev A2 010829
5-29
MODULATORS AND
UPCONVERTERS