Analog Devices AD8342 - Manual

Active Receive Mixer
LF to 500 MHz
AD8342
Rev. 0
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FEATURES
Broadband RF port: LF to 500 MHz
Conversion gain: 3.7 dB
Noise figure: 12.2 dB
Input IP3: 22.7 dBm
Input P
1dB
: 8.3 dBm
LO drive: 0 dBm
Differential high impedance RF input port
Single-ended, 50 Ω LO input port
Single-supply operation: 5 V @ 98 mA
Power-down mode
Exposed paddle LFCSP: 3 mm × 3 mm
APPLICATIONS
Cellular base station receivers
ISM receivers
Radio links
RF instrumentation
FUNCTIONAL BLOCK DIAGRAM
8
7
6
13
15
16
COMM
IFOP
IFOM
5 COMM
14
2 1 3 4
COMM
RFCM
RFIN
VPMX
VPDC PWDN EXRB COMM
11 12 10 9
VPLO LOCM LOIN COMM
BIAS
AD8342
05352-001
Figure 1.
GENERAL DESCRIPTION
The AD8342 is a high performance, broadband active mixer.
It is well suited for demanding receive-channel applications
that require wide bandwidth on all ports and very low inter-
modulation distortion and noise figure.
The AD8342 provides a typical conversion gain of 3.7 dB with
an RF frequency of 238 MHz. The integrated LO driver presents
a 50 Ω input impedance with a low LO drive level, helping to
minimize the external component count.
The differential high impedance broadband RF port allows for
easy interfacing to both active devices and passive filters. The
RF input accepts input signals as large as 1.6 V p-p or 8 dBm
(relative to 50 Ω) at P
1dB
.
The open-collector differential outputs provide excellent bal-
ance and can be used with a differential filter or IF amplifier,
such as the AD8369 or AD8351. These outputs can also be con-
verted to a single-ended signal through the use of a matching
network or a transformer (balun). When centered on the VPOS
supply voltage, the outputs may swing ±2 V differentially.
The AD8342 is fabricated on an Analog Devices proprietary,
high performance SiGe IC process. The AD8342 is available in a
16-lead LFCSP. It operates over a −40°C to +85°C temperature
range. An evaluation board is also available.