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Analog Devices - 1200 MHz to 2400 MHz Quadrature Modulator

Numéro de référence ADRF6702
Description 1200 MHz to 2400 MHz Quadrature Modulator
Fabricant Analog Devices 
Logo Analog Devices 





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ADRF6702 fiche technique
Data Sheet
1200 MHz to 2400 MHz Quadrature Modulator with
1550 MHz to 2150 MHz Frac-N PLL and Integrated VCO
ADRF6702
FEATURES
IQ modulator with integrated fractional-N PLL
Output frequency range: 1200 MHz to 2400 MHz
Internal LO frequency range: 1550 MHz to 2150 MHz
Output P1dB: 13.1 dBm @ 2140 MHz
Output IP3: 29.1 dBm @ 2140 MHz
Noise floor: −159.6 dBm/Hz @ 1960 MHz
Baseband bandwidth: 750 MHz (3 dB)
SPI serial interface for PLL programming
Integrated LDOs and LO buffer
Power supply: 5 V/240 mA
40-lead 6 mm × 6 mm LFCSP
APPLICATIONS
Cellular communications systems
GSM/EDGE, CDMA2000, W-CDMA, TD-SCDMA, LTE
Broadband wireless access systems
Satellite modems
GENERAL DESCRIPTION
The ADRF6702 provides a quadrature modulator and
synthesizer solution within a small 6 mm × 6 mm footprint
while requiring minimal external components.
The ADRF6702 is designed for RF outputs from 1200 MHz to
2400 MHz. The low phase noise VCO and high performance
quadrature modulator make the ADRF6702 suitable for next
generation communication systems requiring high signal
dynamic range and linearity. The integration of the IQ
modulator, PLL, and VCO provides for significant board
savings and reduces the BOM and design complexity.
The integrated fractional-N PLL/synthesizer generates a 2× fLO
input to the IQ modulator. The phase detector together with an
external loop filter is used to control the VCO output. The VCO
output is applied to a quadrature divider. To reduce spurious
components, a sigma-delta (Σ-Δ) modulator controls the
programmable PLL divider.
The IQ modulator has wideband differential I and Q inputs,
which support baseband as well as complex IF architectures.
The single-ended modulator output is designed to drive a
50 Ω load impedance and can be disabled.
The ADRF6702 is fabricated using an advanced silicon-
germanium BiCMOS process. It is available in a 40-lead,
exposed-paddle, Pb-free, 6 mm × 6 mm LFCSP package.
Performance is specified from −40°C to +85°C. A lead-free
evaluation board is available.
Table 1.
Part No.
ADRF6701
ADRF6702
ADRF6703
ADRF6704
Internal LO Range
750 MHz
1150 MHz
1550 MHz
2150 MHz
2100 MHz
2600 MHz
2500 MHz
290 MHz
±3 dB RFOUT Balun Range
400 MHz
1250 MHz
1200 MHz
2400 MHz
1550 MHz
2650 MHz
2050 MHz
3000 MHz
FUNCTIONAL BLOCK DIAGRAM
VCC7 VCC6 VCC5 VCC4 VCC3 VCC2 VCC1
34 29 27 22 17 10
1
LOSEL 36
ADRF6702
LON 37
LOP 38
BUFFER
DIVIDER
÷2
40 DECL3
9 DECL2
BUFFER
DATA 12
CLK 13
LE 14
REFIN 6
MUXOUT 8
SPI
INTERFACE
×2
MUX
÷2
÷4
FRACTION
REG
MODULUS
INTEGER
REG
THIRD-ORDER
FRACTIONAL
INTERPOLATOR
N COUNTER
21 TO 123
TEMP
SENSOR
+
PHASE
FREQUENCY
DETECTOR
PRESCALER
÷2
CHARGE PUMP
250µA,
500µA (DEFAULT),
750µA,
1000µA
4 7 11 15 20 21 23 25 28 30 31 35 24
5
GND
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
NC RSET
Figure 1.
2:1
MUX
VCO
CORE
3 39 16 26
CP VTUNE ENOP RFOUT
2 DECL1
÷2
0/90
18 QP
19 QN
32 IN
33 IP
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.

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