LTC6431-15

1

643115f

Typical applicaTion

FeaTures

DescripTion

50

Ω Gain Block

IF Amplifier

linearity at frequencies beyond 1000MHz and with low

associated output noise.

The unique combination of high linearity, low noise and

low power dissipation make this an ideal candidate for

many signal-chain applications. The LTC6431-15 is easy

to use, requiring a minimum of external components. It is

internally input/output matched to 50Ω and it draws only

90mA from a single 5V supply.

On-chip bias and temperature compensation maintain

performance over environmental changes.

The LTC6431-15 uses a high performance SiGe BiCMOS

process for excellent repeatability compared with similar

GaAsamplifiers.AllA-gradeLTC6431-15devicesaretested

and guaranteed for OIP3 at 240MHz. The LTC6431-15 is

housed in a 4mm × 4mm 24-lead QFN package with an

exposedpadforthermalmanagementandlowinductance.

Single-Ended IF Amplifier

OIP3 vs Frequency

applicaTions

n

20MHz to 1700MHz Bandwidth

n

15.5dB Power Gain

n

47dBm OIP3 at 240MHz into a 50Ω Load

n

NF = 3.33dB at 240MHz

n

1nV/√Hz Total Input Noise

n

S11 < –15dB Up to 1.2GHz

n

S22 < –15dB Up to 1.2GHz

n

n

P1dB = 20.6dBm

n

DC Power = 450mW

n

50Ω Single-Ended Operation

n

n

A-Grade 100% OIP3 Tested at 240MHz

n

Input/Output Internally Matched to 50Ω

n

Single 5V Supply

n

Unconditionally Stable

n

Single-Ended IF Amplifier

n

ADC Driver

n

CATV

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.

643115 TA01a

LTC6431-15

50

1000pF

1000pF

5V

CHOKE,

560nH

50

FREQUENCY (MHz)

0

44

46

48

42

40

400

800

200

600

1000

38

36

50

643115 TA01b