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Analog Devices AD8342 User Manual

Active receive mixer lf to 500 mhz, Ad8342, Features

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Active Receive Mixer

LF to 500 MHz

AD8342

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: 781.461.3113

© 2005 Analog Devices, Inc. All rights reserved.

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.