LT5522 datasheet, PDF - EEWORLD Datasheet

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LT5522: DescriptionTELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC16; CategoryTopical application Wireless rf/communication; File Size238KB，16 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LT5522 Overview

TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC16

LT5522 Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 Cel
Minimum operating temperature	-40 Cel
Rated supply voltage	5 V
Processing package description	4 X 4 MM, PLASTIC, MO-220WGGC, QFN-16
state	ACTIVE
packaging shape	SQUARE
Package Size	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
surface mount	Yes
Terminal form	NO LEAD
Terminal spacing	0.6500 mm
terminal coating	TIN LEAD
Terminal location	QUAD
Packaging Materials	PLASTIC/EPOXY
Temperature level	INDUSTRIAL
Communication type	RF AND BASEBAND CIRCUIT

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LT5522

400MHz to 2.7GHz

High Signal Level

Downconverting Mixer

FEATURES

■

DESCRIPTIO

Internal On-Chip RF Input Transformer

50Ω Single-Ended RF and LO Ports

High Input IP3: +25dBm at 900MHz

+21.5dBm at 1900MHz

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

The LT

5522 active downconverting mixer is optimized for

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.

, 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.

APPLICATIO S

■

Cellular, PCS and UMTS Band Infrastructure

CATV Downlink Infrastructure

2.4GHz ISM

High Linearity Downmixer Applications

TYPICAL APPLICATIO

LT5522

LO INPUT

–5dBm

–

1850MHz

1910MHz

LNA

, SSB NF (dB), IIP3 (dBm)

2.7pF

100pF

150nH

140MHz

(TYP)

VGA

LTC1748

ADC

5522 F01

–

BIAS/

CONTROL

CC1

CC2

150nH

–

0.01µF

3.3µF

Figure 1. High Signal Level Downmixer for Wireless Infrastructure

5522fa

1.9GHz Conversion Gain, IIP3, SSB

NF and LO-RF Leakage vs LO Power

–11

LO-RF

–50

IF = 140MHz

LOW-SIDE LO –60

= 25°C

= 5V

–70

–1

–9

–7

–5

–3

LO INPUT POWER (dBm)

5522 TA01

–10

IIP3

–20

LO-RF LEAKAGE (dBm)

SSB NF

–30

–40

LT5522 Related Products

	LT5522	LT5522EUF
Description	TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC16	TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC16
Number of functions	1	1
Number of terminals	16	16
Maximum operating temperature	85 Cel	85 °C
Minimum operating temperature	-40 Cel	-40 °C
surface mount	Yes	YES
Terminal form	NO LEAD	NO LEAD
Terminal location	QUAD	QUAD
Temperature level	INDUSTRIAL	INDUSTRIAL

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