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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
SiGe HBT
Si CMOS
InGaP/HBT
GaN HEMT
SiGe Bi-CMOS
3
4
LO IN+
12
14
1
2
9RF OUT
+45°
-45°
Σ
÷2
LO2 OUT 15
RF2942
UHF QUADRATURE MODULATOR
AND TRANSMITTER
• 915MHz ISM Band Products
• Digital Communications
• Quadrature Modulation
• Portable Battery-Powered Equipment
The RF2942 is an integrated power amplifier and quadra-
ture modulator IC. The quadrature modulator is driven
with a single-ended local oscillator (LO) source. The
quadrature phase generation of the LO is accomplished
using an internal passive network tuned for twice the
operating frequency. The LO frequency is at twice the RF
frequency to avoid interfering with an external synthe-
sizer.
• 2.0V to 3.6V Power Supply
• 902MHz to 928MHz Frequency Range
• 200mW Output Power
• Low LO Input Level
• Low Broadband Noise Floor
• Small Footprint
RF2942
UHF Quadrature Modulator and Transmitter
RF2942 PCBA
Fully Assembled Evaluation Board
0
Rev A4 040115
12°
MAX
SEATING
PLANE
-C-
0.05
0.01
0.80
0.65
0.05 C
1.00
0.85
0.10
C AB
M
0.35
0.23
0.60
0.24
TYP
0.75
0.50
1.85
1.55
SQ.
0.65
0.23
0.13
4 PLCS
0.65
0.30
4 PLCS
Shaded lead is pin 1.
Dimensions in mm.
4.00 SQ.
2.00 TYP
3.75 SQ.
-B-
-A-
0.25 C A
2 PLCS
0.25 C B
2 PLCS
0.20 C A
2 PLCS
0.20 C B
2 PLCS
1.88 TYP
Package Style: QFN, 16-Pin, 4x4
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