LT1819 Linear Technology Corporation, LT1819 Datasheet

LT1819

Manufacturer Part Number

LT1819

Description

Manufacturer

Linear Technology Corporation

Datasheet

1.LT1819.pdf (16 pages)

Specifications of LT1819

Case

SOP8

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FEATURES

APPLICATIONS

■

TYPICAL APPLICATION

1.3GHz –3dB Bandwidth

Fixed Gain of 10V/V (20dB)

–93dBc IMD

–74dBc IMD

1nV/√ ⎯ H ⎯ z Internal Op Amp Noise

2.1nV/√ ⎯ H ⎯ z Total Input Noise

6.2dB Noise Figure

Differential Inputs and Outputs

200Ω Input Impedance

2.85V to 3.5V Supply Voltage

50mA Supply Current (150mW)

1V to 1.6V Output Common Mode Voltage,

Adjustable

DC- or AC-Coupled Operation

Max Differential Output Swing 4.4V

Small 16-Lead 3mm × 3mm × 0.75mm QFN Package

Differential ADC Driver

Differential Driver/Receiver

Single Ended to Differential Conversion

IF Sampling Receivers

SAW Filter Interfacing

INPUT

66.5Ω

0.1μF + 1000pF

29Ω

0.1μF

Single-Ended to Differential ADC Driver

3.3V

at 70MHz (Equivalent OIP

at 140MHz (Equivalent OIP

+IN

–IN

ENABLE

LTC6401-20

OCM

V –

+OUT

–OUT

20dB GAIN

+OUTF

–OUTF

0.1μF

P-P

10Ω

1.25V

= 50.5dBm)

= 41dBm)

AIN

LTC2208 130Msps

–

LTC2208

16-Bit ADC

640120 TA01a

DESCRIPTION

3.3V

The LTC

targeted at processing signals from DC to 140MHz. The

part has been speciﬁ cally 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 LTC6401-20 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 ﬁ xed

at 20dB (10V/V).

The LTC6401-20 saves space and power compared to

alternative solutions using IF gain blocks and transform-

ers. The LTC6401-20 is packaged in a compact 16-lead

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

to 85°C temperature range.

All other trademarks are the property of their respective owners.

Distortion Differential ADC

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

1.3GHz Low Noise, Low

6401-20 is a high-speed differential ampliﬁ er

Driver for 140MHz IF

Equivalent Output IP3 vs Frequency

FREQUENCY (MHz)

100

LTC6401-20

150

(NOTE 7)

640120 TA01b

200

640120f

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