AD8342_15 Datasheet, PDF (1/24 Pages) Analog Devices – Active Receive Mixer LF to 3 GHz

FEATURES
Broadband RF, LO, and IF ports
Conversion gain: 3.7 dB
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
Open-collector IF output 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
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
intermodulation 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 P1dB.
Active Receive Mixer
LF to 3 GHz
AD8342
FUNCTIONAL BLOCK DIAGRAM
VPDC PWDN EXRB COMM
12
11
10
9
COMM 13
RFCM 14
RFIN 15
VPMX 16
BIAS
AD8342
8 COMM
7 IFOP
6 IFOM
5 COMM
1
2
3
4
VPLO LOCM LOIN COMM
Figure 1.
The open-collector differential outputs provide excellent balance
and can be used with a differential filter or IF amplifier, such as
the AD8370, AD8375, AD8351, AD8352, or ADL5561. These
outputs can also be converted to a single-ended signal using a
matching network or a balun transformer. The outputs are
capable of swinging 2 V p-p when biased to the VPOS supply
rail.
The AD8342 is fabricated on an Analog Devices, Inc.,
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.
Rev. B
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