LT5522

1

5522fa

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

*Operation over a wider frequency range is possible with reduced performance.

Consult factory for information and assistance.

Ω Single-Ended RF and LO Ports

+21.5dBm at 1900MHz

× 4mm) QFN Package

400MHz to 2.7GHz

High Signal Level

Downconverting Mixer

Figure 1. High Signal Level Downmixer for Wireless Infrastructure

The LT

high linearity downconverter applications including cable

and wireless infrastructure. The IC includes a high speed

differential LO buffer amplifier driving a double-balanced

mixer. The LO buffer is internally matched for wideband,

single-ended operation with no external components.

The RF input port incorporates an integrated RF trans-

former and is internally matched over the 1.2GHz to 2.3GHz

frequency range with no external components. The RF

input match can be shifted down to 400MHz, or up to

2.7GHz, with a single shunt capacitor or inductor, respec-

tively. The high level of integration minimizes the total

solution cost, board space and system-level variation.

The LT5522 delivers high performance and small size

without excessive power consumption.

LTC1748

ADC

5522 F01

140MHz

(TYP)

1850MHz

TO

1910MHz

100pF

2.7pF

LT5522

LO INPUT

–5dBm

EN

150nH

150nH

0.01

µF

3.3

µF

5V

BIAS/

CONTROL

VGA

LNA

LO INPUT POWER (dBm)

–11

0

4

8

12

16

–9

–7

–5

–3

5522 TA01

–1

1

20

IIP3

24

22

IF = 140MHz

LOW-SIDE LO

2

6

10

14

18

–70

–60

–50

–40

–30

–20

–10

SSB NF

LO-RF

1.9GHz Conversion Gain, IIP3, SSB

NF and LO-RF Leakage vs LO Power

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO