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PDF ADRF6704 Data sheet ( Hoja de datos )
| Número de pieza | ADRF6704 | |
| Descripción | 2050 MHz to 3000 MHz Quadrature Modulator | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
2050 MHz to 3000 MHz Quadrature Modulator with
2500 MHz to 2900 MHz Frac-N PLL and Integrated VCO
ADRF6704
FEATURES
IQ modulator with integrated fractional-N PLL
Output frequency range: 2050 MHz to 3000 MHz
Internal LO frequency range: 2500 MHz to 2900 MHz
Output P1dB: 12.1 dBm @ 2700 MHz
Output IP3: 27.2 dBm @ 2700 MHz
Noise floor: −158.3 dBm/Hz @ 2700 MHz
Baseband bandwidth: 750 MHz (3 dB)
SPI serial interface for PLL programming
Integrated LDOs and LO buffer
Power supply: 5 V/226 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
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 ADRF6704 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.
GENERAL DESCRIPTION
Table 1.
The ADRF6704 provides a quadrature modulator and
synthesizer solution within a small 6 mm × 6 mm footprint
while requiring minimal external components.
The ADRF6704 is designed for RF outputs from 2050 MHz to
3000 MHz. The low phase noise VCO and high performance
quadrature modulator make the ADRF6704 suitable for next
generation communication systems requiring high signal
dynamic range and linearity. The integration of the IQ
Part No.
ADRF6701
ADRF6702
ADRF6703
ADRF6704
Internal LO Range
750 MHz
1150 MHz
1550 MHz
2150 MHz
2100 MHz
2600 MHz
2500 MHz
2900 MHz
IQ Modulator
±3 dB RF Output Range
400 MHz
1250 MHz
1200 MHz
2400 MHz
1550 MHz
2650 MHz
2050 MHz
3000 MHz
VCC7
34
VCC6
29
VCC5
27
FUNCTIONAL BLOCK DIAGRAM
VCC4 VCC3 VCC2 VCC1
22 17
10
1
LOSEL 36
ADRF6704
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. 0
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.
Free Datasheet http://www.datasheet4u.com/
1 page  
Data Sheet
ADRF6704
Parameter
BASEBAND INPUTS
I and Q Input DC Bias Level
Bandwidth
Differential Input Impedance
Differential Input Capacitance
LOGIC INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IINH/IINL
Input Capacitance, CIN
TEMPERATURE SENSOR
Output Voltage
Temperature Coefficient
POWER SUPPLIES
Voltage Range
Supply Current
Test Conditions/Comments
IP, IN, QP, QN pins
POUT ≈ −7 dBm, RF flatness of IQ modulator output calibrated out
0.5 dB
3 dB
CLK, DATA, LE, ENOP, LOSEL
VPTAT voltage measured at MUXOUT
TA = 25°C, RL ≥10 kΩ (LO buffer disabled)
TA = −40°C to +85°C, RL ≥10 kΩ
VCC1, VCC2, VCC3, VCC4, VCC5, VCC6, VCC7
Normal Tx mode (PLL and IQMOD enabled, LO buffer disabled)
Tx mode using external LO input (internal VCO/PLL disabled)
Tx mode with LO buffer enabled
Power-down mode
Min Typ
400 500
350
750
920
1
1.4
0
0.1
5
1.579
3.8
4.75 5
226
135
276
22
Max Unit
600 mV
MHz
MHz
Ω
pF
3.3 V
0.7 V
μA
pF
V
mV/°C
5.25 V
mA
mA
mA
mA
1 The figure of merit (FOM) is computed as phase noise (dBc/Hz) – 10log10(fPFD) – 20log10(fLO/fPFD). The FOM was measured across the full LO range, with fREF = 80 MHz,
fREF power = 10 dBm (500 V/μs slew rate) with a 40 MHz fPFD. The FOM was computed at 50 kHz offset.
Rev. 0 | Page 5 of 36
Free Datasheet http://www.datasheet4u.com/
5 Page 
Data Sheet
0 –40°C
+25°C
–10 +85°C
–20
–30
–40
–50
–60
–70
–80
2500 2550 2600 2650 2700 2750 2800 2850 2900
LO FREQUENCY (MHz)
Figure 10. Carrier Feedthrough vs. LO Frequency (fLO) and Temperature;
Multiple Devices Shown
0 –40°C
+25°C
–10 +85°C
–20
–30
–40
–50
–60
–70
–80
–90
2500
2550
2600 2650 2700 2750 2800
LO FREQUENCY (MHz)
2850
2900
Figure 11. Sideband Suppression vs. LO Frequency (fLO) and Temperature;
Multiple Devices Shown
90
85
–40°C
+25°C
80 +85°C
75
70
65
60
55 OIP2
50
45
40
35 OIP3
30
25
20
15
10
2500 2550 2600
2650
2700
2750
2800
2850
2900
LO FREQUENCY (MHz)
Figure 12. OIP3 and OIP2 vs. LO Frequency (fLO) and Temperature
(POUT ≈ −2 dBm per Tone); Multiple Devices Shown
ADRF6704
0
–40°C
+25°C
–10 +85°C
–20
–30
–40
–50
–60
–70
–80
2500 2550 2600 2650 2700 2750 2800 2850 2900
LO FREQUENCY (MHz)
Figure 13. Carrier Feedthrough vs. LO Frequency (fLO) and Temperature After
Nulling at 25°C; Multiple Devices Shown
0
–40°C
+25°C
–10 +85°C
–20
–30
–40
–50
–60
–70
–80
–90
2500
2550
2600 2650 2700 2750 2800
LO FREQUENCY (MHz)
2850
2900
Figure 14. Sideband Suppression vs. LO Frequency (fLO) and Temperature
After Nulling at 25°C; Multiple Devices Shown
–20
–40°C
–25 +25°C
+85°C
–30
–35
–40 THIRD-ORDER DISTORTION
–45
–50
–55
–60 SECOND-ORDER DISTORTION
–65
–70
–75
–80
2500 2550 2600 2650 2700 2750 2800 2850 2900
LO FREQUENCY (MHz)
Figure 15. Second- and Third-Order Distortion vs. LO Frequency (fLO) and
Temperature
Rev. 0 | Page 11 of 36
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11 Page | ||
| Páginas | Total 36 Páginas | |
| PDF Descargar | [ Datasheet ADRF6704.PDF ] | |
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