LTC5569 查看數據表（PDF） - Linear Technology

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LTC5569

14-Bit 80Msps Low Power 3V ADC

Linear Technology 

Features

n High IIP3: +26.9dBm at 1950MHz

n 1.9dB Conversion Gain

n Low Noise Figure: 11.8dB at 1950MHz

n 16.5dB NF Under 5dBm Blocking

n Low Power: 294mW

n Wide IF Frequency Range Up to 2.5GHz

n LO Input 50Ω Matched when Shutdown

n –40°C to 105°C Operation (TC)

n Very Small Solution Size

n Pin Compatible with LT5557

n 16-Lead (4mm × 4mm) QFN package

Applications

n Wireless Infrastructure Receivers

n DPD Observation Receivers

n CATV Infrastructure

LTC5567

300MHz to 4GHz Active

Downconverting Mixer with

Wideband IF

Description

The LTC®5567 is optimized for RF downconverting mixer

applications that require wide IF bandwidth. The part is

also a pin-compatible upgrade to the LT5557 active mixer,

offering higher linearity and 1dB compression, wider

bandwidth, and lower output spurious levels. Integrated

RF and LO transformers and LO buffer amplifiers allow a

very compact solution.

The RF input is 50Ω matched from 1.4GHz to 3GHz, and

easily matched for higher or lower RF frequencies with

simple external matching. The LO input is 50Ω matched

from 1GHz to 4GHz, even when the IC is disabled. The LO

input is easily matched for higher or lower frequencies, as

low as 300MHz, with simple external matching. The low

capacitance differential IF output is usable up to 2.5GHz.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Typical Application

DPD Observation Receiver Mixer with 500MHz IF Bandwidth and

+13dBm Input P1dB into 200Ω Load

LO

1.65GHz

0dBm

3.9pF

LTC5567

LO

330pF

200Ω LOAD

RF

1.69GHz

TO

2.24GHz

2.7pF

RF

LO

RF

IF+

249Ω 390nH

100Ω

IF

AMP

249Ω 390nH

100Ω

EN

EN

BIAS

VCC

10nF

IF–

IADJ

10nF

330pF

3.3V

89mA

5567 TA01a

Voltage Conversion Gain, IIP3

and NF vs IF Frequency

28

26

IIP3

24

22 RF = 1.69GHz TO 2.24GHz

20 LO = 1.65GHz

18

ZRF = 50Ω

ZIF = 200Ω DIFFERENTIAL

16 TC = 25°C

14

NF

12

10

8

6

GV

4

40 90 140 190 240 290 340 390 440 490 540 590

IF FREQUENCY (MHz)

5567 TA01b

5567f

1

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