Active Receive Mixer

LF to 500 MHz

AD8342

Rev. 0

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FEATURES

Broadband RF port: LF to 500 MHz

Conversion gain: 3.7 dB

Noise figure: 12.2 dB

Input IP3: 22.7 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

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

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.