500 MHz to 1700 MHz Balanced Mixer,
LO Buffer and RF Balun
ADL5367
FEATURES
FUNCTIONAL BLOCK DIAGRAM
VCMI
20
IFOP
19
IFON
18
PWDN
17
COMM
16
RF frequency range of 500 MHz to 1700 MHz
IF frequency range of 30 MHz to 450 MHz
Power conversion loss: 7.7 dB
SSB noise figure of 8.3 dB
SSB noise figure with 5 dBm blocker of 21 dB
Input IP3 of 34 dBm
ADL5367
1
2
3
4
5
15
14
13
12
11
VPMX
RFIN
LOI2
VPSW
VGS1
VGS0
LOI1
Typical LO drive of 0 dBm
Single-ended, 50 Ω RF and LO input ports
High isolation SPDT LO input switch
Single-supply operation: 3.3 V to 5 V
Exposed paddle 5 mm × 5 mm, 20-lead LFCSP
1500 V HBM/500 V FICDM ESD performance
RFCT
COMM
COMM
BIAS
GENERATOR
APPLICATIONS
Cellular base station receivers
Transmit observation receivers
Radio link downconverters
6
7
LGM3
8
9
10
VLO3
VLO2
LOSW
NC
NC = NO CONNECT
Figure 1.
GENERAL DESCRIPTION
The ADL5367 provides two switched LO paths that can be
used in TDD applications where it is desirable to rapidly switch
between two local oscillators. LO current can be externally set
using a resistor to minimize dc current commensurate with the
desired level of performance. For low voltage applications, the
ADL5367 is capable of operation at voltages down to 3.3 V with
substantially reduced current. Under low voltage operation, an
additional logic pin is provided to power down (<200 μA) the
circuit when desired.
The ADL5367 uses a highly linear, doubly balanced passive
mixer core along with integrated RF and LO balancing circuitry
to allow for single-ended operation. The ADL5367 incorporates
an RF balun, allowing optimal performance over a 500 MHz to
1700 MHz RF input frequency range. Performance is optimized for
RF frequencies from 500 MHz to 1200 MHz using a high-side LO
and for RF frequencies from 900 MHz to 1700 MHz using a
low-side LO. The balanced passive mixer arrangement provides
good LO-to-RF leakage, typically better than −35 dBm, and
excellent intermodulation performance. The balanced mixer
core also provides extremely high input linearity, allowing the
device to be used in demanding cellular applications where in-
band blocking signals may otherwise result in the degradation
of dynamic performance. A high linearity IF buffer amplifier
follows the passive mixer core to yield a typical power conversion
loss of 7.7 dB and can be used with a wide range of output
impedances.
The ADL5367 is fabricated using a BiCMOS high performance
IC process. The device is available in a 5 mm × 5 mm, 20-lead
LFCSP and operates over a −40°C to +85°C temperature range.
An evaluation board is also available.
Table 1. Passive Mixers
RF Frequency
(MHz)
Single
Mixer
Single Mixer +
IF Amp
Dual Mixer +
IF Amp
500 to 1700
ADL5367 ADL5357
ADL5365 ADL5355
ADL5358
ADL5356
1200 to 2500
Rev. 0
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