LTC6406 datasheet(1/16 Pages) LINER

Part #	LTC6406

Description	2.4GHz Low Noise, Low Distortion Differential ADC Driver for 300MHz IF

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Manufacturer	LINER [Linear Technology]

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LTC6400-14

1

640014fb

FREQUENCY (MHz)

050

70

60

50

40

30

20

10

0

100

150

200

640020 TA01b

250

300

(NOTE 7)

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

2.4GHz Low Noise, Low

Distortion Differential ADC

Driver for 300MHz IF

The LTC®6400-14 is a high-speed differential ampliﬁer

targeted at processing signals from DC to 300MHz. The

part has been speciﬁcally designed to drive 12-, 14- and

16-bit ADCs with low noise and low distortion, but can also

be used as a general-purpose broadband gain block.

The LTC6400-14 is easy to use, with minimal support

circuitry required. The output common mode voltage is

set using an external pin, independent of the inputs, which

eliminates the need for transformers or AC-coupling ca-

pacitors in many applications. The gain is internally ﬁxed

at 14dB (5V/V).

The LTC6400-14 saves space and power compared to

alternative solutions using IF gain blocks and transformers.

The LTC6400-14 is packaged in a compact 16-lead 3mm

×

3mm QFN package and operates over the – 40°C to 85°C

temperature range.

Equivalent Output IP3 vs

Frequency

n 2.4GHz –3dB Bandwidth

n Fixed Gain of 5V/V (14dB)

n –97dBc IMD3 at 70MHz (Equivalent OIP3 = 52.4dBm)

n –66dBc IMD3 at 300MHz (Equivalent OIP3 = 36.9dBm)

n 1.1nV/√Hz Internal Op Amp Noise

n 2.5nV/√Hz Total Input Noise

n 7.5dB Noise Figure

n Differential Inputs and Outputs

n 200

Ω Input Impedance

n 2.85V to 3.5V Supply Voltage

n 85mA Supply Current (255mW)

n 1V to 1.6V Output Common Mode Voltage,

Adjustable

n DC- or AC-Coupled Operation

n Max Differential Output Swing 4.8VP-P

n Small 16-Lead 3mm

× 3mm × 0.75mm QFN Package

n Differential ADC Driver

n Differential Driver/Receiver

n Single Ended to Differential Conversion

n IF Sampling Receivers

n SAW Filter Interfacing

R2

29Ω

R1

68.5Ω

C4

0.1μF

C3

0.1μF

64014 TA01a

LTC6400-14

LTC2208

RS1

15Ω

C2

0.1μF

VIN

C1

1000pF

3.3V

RS2

15Ω

RS3

10Ω

RS4

10Ω

R3

100Ω

VOCM

C5

0.1μF

1.25V

CF2

33pF

COILCRAFT

0603CS

CF1

33pF

L1

24nH

CF3

33pF

V+

–IN

+IN

+OUT

–OUT

V–

AIN+

AIN–

VCM

VDD

LTC2208

130Msps

16-Bit ADC

Single-Ended to Differential ADC Driver

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

All other trademarks are the property of their respective owners.

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