LF to 4 GHz
High Linearity Y-Mixer
Preliminary Technical Data
ADL5350
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Broadband RF, IF, and LO ports
Conversion loss: 6 dB
Noise figure: 6 dB
GND
RF
INPUT OR
OUTPUT
IF
OUTPUT OR
INPUT
ADL5350
RF
IF
High input IP3: 26 dBm
High input P1dB: 17 dBm
GC
Low LO drive level
3V
Single-ended design: no need for baluns
Single-supply operation: 3 V @ 10 mA
Miniature 8-lead 3 mm x 2 mm LFCSP package
RoHS compliant
GND
VPOS
LO
LO
INPUT
APPLICATIONS
Figure 1.
Cellular base station
Point-to-point radio links
RF instrumentation
GENERAL DESCRIPTION
The ADL5350 is a high linearity, up-and-down converting mixer
capable of operating over a broad input frequency range. It is well
suited for demanding cellular base-station mixer designs that
require high sensitivity and efficient blocker immunity. Based
on a GaAs pHEMT single-ended mixer architecture, the ADL5350
provides excellent input linearity and low noise figure without
the need for a high power level, local oscillator (LO) drive.
For low frequency applications, the ADL5350 provides access to
the gate contact of the output-mixing device. This allows an
external LO coupling capacitor to be applied between the
VPOS pin and GC pin, helping to improve the LO drive to the
switching device. Using a single 100 pF capacitor allows high
performance at the lower LO frequencies.
The single-ended broadband RF/IF port allows the device to be
customized for a desired band of operation using simple
external filter networks. The LO to RF isolation is based on the
LO rejection of the RF port filter network. Greater isolation
may be achieved using higher order filter networks as described
in the Applications section of this data sheet.
In 850 MHz/900 MHz receive applications, the ADL5350
provides a typical conversion loss of only 6 dB. The integrated
LO amplifier allows a low LO drive level, typically only 4 dBm
for most applications. The input IP3 is typically greater than
25 dBm, with an input compression point of 17 dBm. The high
input linearity of the ADL5350 makes the device an excellent
mixer for communications systems that require high blocker
immunity, such as GSM 850/900 and 800 MHz CDMA2000. At
2 GHz, a slightly greater supply current is required to obtain
similar performance.
The ADL5350 is fabricated on a GaAs pHEMT high
performance IC process. The ADL5350 is available in a
3 mm × 2 mm 8-lead LFCSP package. It operates over a
−40°C to +85°C temperature range. An evaluation board is also
available.
Rev. PrC
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