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RF2668 Datasheet

  • RF2668

  • CDMA/FM TRANSMIT MODULATOR, IF AGC, AND UPCONVERTER WITH INT...

  • 16頁

  • RFMD

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Preliminary
RF2668
CDMA/FM TRANSMIT MODULATOR, IF AGC,
AND UPCONVERTER WITH INTEGRATED PLL
5
Typical Applications
鈥?CDMA/FM Cellular and PCS Systems
鈥?Tri-Mode/Dual-Band CDMA Applications
鈥?W-CDMA Systems
鈥?Wireless Local Loop Systems
鈥?Spread-Spectrum Cordless Phones
鈥?High Speed Data Modems
Product Description
The RF2668 is an integrated complete quadrature modu-
lator, IF AGC amplifier, upconverter, and PLL, designed
for the transmit section of dual-mode CDMA/FM cellular,
PCS, and tri-mode CDMA applications. It is designed to
modulate baseband I and Q signals, amplify the resulting
IF signals while providing 95dB of gain control range, and
perform the final upconversion to UHF. Noise Figure, IP
3
,
and other specifications are designed to be compatible
with the IS-98 Interim Standard. This circuit is designed
as part of RFMD鈥檚 newest CDMA chipset, which also
includes the RF2667 CDMA/FM Receive IF AGC and
Demodulator. The IC is manufactured on an advanced
18GHz F
T
Silicon Bipolar process, and is supplied in a
48-lead plastic LQFP package.
Optimum Technology Matching廬 Applied
9.00
+ 0.20
sq.
0.35
0.25
0.50
7.00
+ 0.10 sq.
5
MODULATORS AND
UPCONVERTERS
0.22
+ 0.05
7擄 MAX
0擄 MIN
1.40
+ 0.05
0.60
+ 0.15
0.10
0.127
Package Style: LQFP-48_7x7
眉
Si Bi-CMOS
MODE
VCC3
BG
48
NC 1
NC 2
47
46
Band Gap
Rel
Si BJT
GaAs HBT
SiGe HBT
VCO_EN
PLLISET
MIX_EN
PLLON
TX_EN
GaAs MESFET
Si CMOS
VREFPLL
OSCREF
Features
鈥?Supports Tri-Mode Operation
鈥?Digitally Controlled Power Down Modes
45
44
43
42
41
40
39
38
37
36 SET2
35 PLLVCC
Bias
Supply
/R
Lock
Detect
Charge
Pump
SET1
CE
鈥?2.7V to 3.3V Operation
鈥?Digital First LO Quadrature Divider
鈥?Double-Balanced UHF Upconvert Mixer
鈥?IF AGC Amp with 95dB Gain Control
RFOUT 3
VCC4 4
/N
LO2+ 5
LO2- 6
GND2 7
GND2 8
MIX_DEC 9
MIX IN+ 10
MIX IN- 11
NC 12
13
NC
14
MOD OUT-
15
MOD OUT+
16
GND1
17
AGC_DEC
18
VGC
19
VCC2
20
GND1
21
QSIG
22
QREF
34 PLLGND
33 LD
32 DO
31 VCO+
30 VCO-
29 LO1+
28 LO1-
危
Quad
/2
27 VCC1
26 VCO_ISET
25 NC
Ordering Information
CDMA/FM Transmit Modulator, IF AGC, and
Upconverter with Integrated PLL
RF2668 PCBA-PCS/CEL Fully Assembled Evaluation Boards
RF2668 PCBA-DO
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
RF2668
23
IREF
24
ISIG
Functional Block Diagram
Rev B4 010423
5-71

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