Active Receive Mixer
LF to 500 MHz
AD8342
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Broadband RF port: LF to 500 MHz
Conversion gain: 3.7 dB
VPDC PWDN EXRB COMM
10
9
12
11
Noise figure: 12.2 dB
Input IP3: 22.7 dBm
Input P1dB: 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
COMM
RFCM
RFIN
13
8
7
6
5
COMM
IFOP
BIAS
14
15
16
AD8342
IFOM
VPMX
COMM
3
4
1
2
VPLO LOCM LOIN COMM
Exposed paddle LFCSP: 3 mm × 3 mm
Figure 1.
APPLICATIONS
Cellular base station receivers
ISM receivers
Radio links
RF instrumentation
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 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 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 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.
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 P1dB
.
Rev. 0
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