700 MHz to 3000 MHz Dual Passive
Receive Mixer with Integrated PLL and VCO
Data Sheet
ADRF6612
FEATURES
FUNCTIONAL BLOCK DIAGRAM
RF frequency: 700 MHz to 3000 MHz, continuous
LO input frequency: 200 MHz to 2700 MHz, high-side or low-
side injection
2
46
45 44
48 47 43 42
39 38
41 40 37
IF range: 40 MHz to 500 MHz
Power conversion gain of 9.0 dB
Single sideband (SSB) noise figure of 11.3 dB
Input IP3 of 30 dBm
Input P1dB of 10.6 dBm
Typical LO input drive of 0 dBm
Single-ended, 50 Ω RF port
Single-ended or balanced LO input port
Serial port interface (SPI) control on all functions
Exposed pad, 7 mm × 7 mm, 48-lead LFCSP
1
3
6
7
34
33
32
GND
GND
GND
VCC1
VCC10
VCC9
VCC8
PLL REF BUFFER
PFD/CP
VCO
VCO
VCO
FRACTIONAL DIVIDER
36
35
RFBCT1
RFIN1
31 VCC7
30 LDO2
÷1 TO
32
4
5
EXTVCOIN+
EXTVCOIN–
26
RFIN2
ADRF6612
8
25
DECL1
DECL2
DECL3
DECL4
DECL5
RFBCT2
PLL
3.3V
LDO
VCO
LDO
9
29
28
27
VCC6
VCC5
VCC4
SPI
CONTROL
10
11
12
SPI
2.5V 3.3V
LDO LDO
DIV
13 14
15 16 17 18 19
22 23
20 21 24
APPLICATIONS
Multiband/multistandard cellular base station diversity
receivers
Wideband radio link diversity downconverters
Multimode cellular extenders and picocells
Figure 1.
GENERAL DESCRIPTION
The ADRF6612 is a dual radio frequency (RF) mixer and
intermediate frequency (IF) amplifier with an integrated phase-
locked loop (PLL) and voltage controlled oscillators (VCOs). The
ADRF6612 uses revolutionary broadband square wave limiting
local oscillator (LO) amplifiers to achieve an unprecedented RF
bandwidth of 700 MHz to 3000 MHz. Unlike narrow-band sine
wave LO amplifier solutions, the LO can be applied above or
below the RF input over an extremely wide bandwidth. Energy
storage elements are not utilized in the LO amplifier, thus dc
current consumption also decreases with decreasing LO
frequency.
wideband applications where in band blocking signals may
otherwise result in the degradation of dynamic range. Noise
performance under blocking is comparable to narrow-band
passive mixer designs. High linearity IF buffer amplifiers follow the
passive mixer cores, yielding typical power conversion gains of
9 dB, and can be matched to a wide range of output impedances.
The PLL architecture supports both integer-N and fractional-N
operation and can generate the entire LO frequency range of
200 MHz to 2700 MHz using an external reference input
frequency anywhere in the range of 12 MHz to 320 MHz. An
external loop filter provides flexibility in trading off phase noise
vs. acquisition time. To reduce fractional spurs in fractional-N
mode, a sigma-delta (Σ-Δ) modulator controls the post-VCO
programmable divider. The VCO consists of multiple VCO cores.
The ADRF6612 utilizes highly linear, doubly balanced passive
mixer cores with integrated RF and LO balancing circuits to
allow single-ended operation. Integrated RF baluns allow optimal
performance over the 700 MHz to 3000 MHz RF input frequency.
The balanced passive mixer arrangement provides outstanding
LO to RF and LO to IF leakages, excellent RF to IF isolation,
and excellent intermodulation performance over the full RF
bandwidth.
All features of the ADRF6612 are controlled via a 3-wire SPI
resulting in optimum performance and minimum external
components.
The ADRF6612 is fabricated using a BiCMOS, high performance
IC process. The device is available in a 7 mm × 7 mm, 48-lead
LFCSP package and operates over a −40°C to +85°C temperature
range. An evaluation board is available.
The balanced mixer cores provide extremely high input
linearity, allowing the device to be used in demanding
Rev. A
Document Feedback
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
rightsof third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2014–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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