AD8344_15 Datasheet, PDF (1/20 Pages) Analog Devices – Active Receive Mixer 400 MHz to 1.2 GHz

FEATURES
Broadband RF port: 400 MHz to 1.2 GHz
Conversion gain: 4.5 dB
Noise figure: 10.5 dB
Input IP3: 24 dBm
Input P1dB: 8.5 dBm
LO drive: 0 dBm
External control of mixer bias for low power operation
Single-ended, 50 Ω RF and LO input ports
Single-supply operation: 5 V @ 84 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 AD8344 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 intermodula-
tion distortion and noise figure.
The AD8344 provides a typical conversion gain of 4.5 dB at
890 MHz. The integrated LO driver supports a 50 Ω input
impedance with a low LO drive level, helping to minimize
external component count.
The single-ended 50 Ω broadband RF port allows for easy
interfacing to both active devices and passive filters. The RF
input accepts input signals as large as 1.7 V p-p or 8.5 dBm
(re: 50 Ω) at P1dB.
Active Receive Mixer
400 MHz to 1.2 GHz
AD8344
FUNCTIONAL BLOCK DIAGRAM
12
COMM 13
11 10
BIAS
RFCM 14
9
8 COMM
7 IFOP
RFIN 15
6 IFOM
VPMX 16
5 COMM
1
2
3
4
Figure 1.
The open-collector differential outputs provide excellent
balance and can be used with a differential filter or IF amplifier,
such as the AD8369 or AD8351. These outputs may 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, each of the differential outputs may swing
2.5 V p-p.
The AD8344 is fabricated on an Analog Devices proprietary,
high performance SiGe IC process. The AD8344 is available
in a 16-lead LFCSP package. It operates over a −40°C to +85°C
temperature range. An evaluation board is also available.
Rev. 0
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