lt5522 Linear Technology Corporation, lt5522 Datasheet

lt5522

Manufacturer Part Number

lt5522

Description

600mhz To 2.7ghz High Signal Level Downconverting Mixer

Manufacturer

Linear Technology Corporation

Datasheet

1.LT5522.pdf (16 pages)

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FEATURES

TYPICAL APPLICATIO

■

APPLICATIO S

1850MHz

1910MHz

Internal On-Chip RF Input Transformer

50Ω Single-Ended RF and LO Ports

High Input IP3: +25dBm at 900MHz

Low Power Consumption: 280mW Typical

Integrated LO Buffer: Low LO Drive Level

High LO-RF and LO-IF Isolation

Wide RF Frequency Range: 0.4GHz to 2.7GHz*

Very Few External Components

Enable Function

4.5V to 5.25V Supply Voltage Range

16-Lead (4mm × 4mm) QFN Package

Cellular, PCS and UMTS Band Infrastructure

CATV Downlink Infrastructure

2.4GHz ISM

High Linearity Downmixer Applications

LNA

Figure 1. High Signal Level Downmixer for Wireless Infrastructure

+21.5dBm at 1900MHz

LT5522

–

CONTROL

BIAS/

CC1

LO INPUT

–5dBm

0.01µF

CC2

–

100pF

2.7pF

3.3µF

150nH

140MHz

(TYP)

DESCRIPTIO

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.

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.

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

VGA

5522 active downconverting mixer is optimized for

Downconverting Mixer

LTC1748

ADC

5522 F01

400MHz to 2.7GHz

High Signal Level

NF and LO-RF Leakage vs LO Power

1.9GHz Conversion Gain, IIP3, SSB

–11

–9

LO INPUT POWER (dBm)

–7

–5

SSB NF

LO-RF

–3

LT5522

IF = 140MHz

LOW-SIDE LO

IIP3

= 25°C

= 5V

–1

5522 TA01

–10

–20

–30

–40

–50

–60

–70

5522fa

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