LT6604CUFF-5-PBF LINER [Linear Technology], LT6604CUFF-5-PBF Datasheet

LT6604CUFF-5-PBF

Manufacturer Part Number

LT6604CUFF-5-PBF

Description

Dual Very Low Noise, Differential Amplifi er and 5MHz Lowpass Filter

Manufacturer

LINER [Linear Technology]

Datasheet

1.LT6604CUFF-5-PBF.pdf (16 pages)

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FEATURES

APPLICATIONS

TYPICAL APPLICATION

–

Dual Differential Ampliﬁ er with 5MHz Lowpass Filters

>82dB Signal-to-Noise (3V Supply, 2V

Low Distortion (1MHz, 2V

Speciﬁ ed for Operation with 3V, 5V and ±5V Supplies

Fully Differential Inputs and Outputs

Adjustable Output Common Mode Voltage

Small 4mm × 7mm × 0.75mm QFN Package

Dual Differential ADC Driver and Filter

Single-Ended to Differential Converter

Matched, Dual, Differential Gain or Filter Stage

Common Mode Translation of Differential Signals

High Speed ADC Antialiasing and DAC Smoothing in

Wireless Infrastructure or Networking Applications

High Speed Test and Measurement Equipment

Medical Imaging

0.01μF

4th Order Filters

Approximates Chebyshev Response

Guaranteed Phase and Gain Matching

Resistor-Programmable Differential Gain

HD2: 93dBc

HD3: 96dBc

806Ω

LT6604-5

+INA

–INA

+INB

–INB

MIDA

OCMA

MIDB

OCMB

–

P-P

–OUTB

+OUTB

–OUTA

+OUTA

Output, 800Ω Load)

50Ω

P-P

Output)

18pF

LTC22xx

AIN

–

DOUT

DESCRIPTION

The LT

ampliﬁ ers, each with a 4th order, 5MHz lowpass ﬁ lter. The

ﬁ xed frequency lowpass ﬁ lter approximates a Chebyshev

response. By integrating a ﬁ lter and a differential ampli-

ﬁ er, distortion and noise are made exceptionally low. At

unity gain, the measured in-band signal-to-noise ratio is

an impressive 82dB. At higher gains, the input referred

noise decreases, allowing the part to process smaller

input differential signals without signiﬁ cantly degrading

the signal-to-noise ratio.

Gain and phase are well matched between the two chan-

nels. Gain for each channel is independently programmed

using two external resistors. The LT6604-5 enables level

shifting by providing an adjustable output common mode

voltage, making it ideal for directly interfacing to ADCs.

The LT6604-5 is fully speciﬁ ed for 3V operation. The dif-

ferential design enables outstanding performance at a

See the back page of this datasheet for a complete list of

related single and dual differential ampliﬁ ers with integrated

2.5MHz to 20MHz lowpass ﬁ lters.

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

trademarks are the property of their respective owners.

DUAL ADC

P-P

66045 TA01

Differential Ampliﬁ er and

signal level for a single 3V supply.

6604-5 consists of two matched, fully differential

Dual Very Low Noise,

5MHz Lowpass Filter

–0.20

Channel to Channel Gain Matching

50 TYPICAL UNITS

GAIN = 1

= 25°C

= 5MHz

–0.10

GAIN MATCH (dB)

LT6604-5

0.10

66045 TA01b

0.20

66045f

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