RF2668 Ver la hoja de datos (PDF) - RF Micro Devices
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RF2668 Datasheet PDF : 16 Pages
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Preliminary
RF2668
5
CDMA/FM TRANSMIT MODULATOR, IF AGC,
AND UPCONVERTER WITH INTEGRATED PLL
Typical Applications
• CDMA/FM Cellular and PCS Systems
• Tri-Mode/Dual-Band CDMA Applications
• W-CDMA Systems
• Wireless Local Loop Systems
• Spread-Spectrum Cordless Phones
• High Speed Data Modems
Product Description
The RF2668 is an integrated complete quadrature modu-
lator, IF AGC amplifier, upconverter, and PLL, designed
9.00
+ 0.20
sq.
0.35
0.25
5
for the transmit section of dual-mode CDMA/FM cellular,
PCS, and tri-mode CDMA applications. It is designed to
0.50
7.00
modulate baseband I and Q signals, amplify the resulting
+ 0.10 sq.
IF signals while providing 95dB of gain control range, and
perform the final upconversion to UHF. Noise Figure, IP3,
and other specifications are designed to be compatible
0.22
+ 0.05
1.40
+ 0.05
with the IS-98 Interim Standard. This circuit is designed
as part of RFMD’s newest CDMA chipset, which also
7° MAX
0° MIN
includes the RF2667 CDMA/FM Receive IF AGC and
Demodulator. The IC is manufactured on an advanced
18GHz FT Silicon Bipolar process, and is supplied in a
0.60
+ 0.15
0.10
0.127
48-lead plastic LQFP package.
Optimum Technology Matching® Applied
Si BJT
üSi Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
48 47 46 45 44 43 42 41 40 39 38 37
NC 1
NC 2
Band Gap
Rel
RFOUT 3
VCC4 4
LO2+ 5
Bias
Supply
/R
Lock
Detect
Charge
/N
Pump
36 SET2
35 PLLVCC
34 PLLGND
33 LD
32 DO
LO2- 6
31 VCO+
GND2 7
30 VCO-
GND2 8
29 LO1+
MIX_DEC 9
28 LO1-
MIX IN+ 10
MIX IN- 11
Σ
Quad
/2
27 VCC1
26 VCO_ISET
NC 12
25 NC
13 14 15 16 17 18 19 20 21 22 23 24
Functional Block Diagram
Package Style: LQFP-48_7x7
Features
• Supports Tri-Mode Operation
• Digitally Controlled Power Down Modes
• 2.7V to 3.3V Operation
• Digital First LO Quadrature Divider
• Double-Balanced UHF Upconvert Mixer
• IF AGC Amp with 95dB Gain Control
Ordering Information
RF2668
RF2668 PCBA-PCS/CEL
RF2668 PCBA-DO
CDMA/FM Transmit Modulator, IF AGC, and
Upconverter with Integrated PLL
Fully Assembled Evaluation Boards
Fully Assembled Evaluation Boards
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Rev B4 010423
5-71
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