Active Receive Mixer
400 MHz to 1.2 GHz
AD8344
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
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
FUNCTIONAL BLOCK DIAGRAM
VPLO
1
LOCM
2
LOIN
3
COMM
4
VPDC
12
PWDN
11
EXRB
10
COMM
9
COMM
8
IFOP
7
IFOM
6
COMM
5
COMM
13
RFCM
14
RFIN
15
VPMX
16
BIAS
04826-0-001
Figure 1.
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.
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.
