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600I25

更新时间： 2024-09-21 07:59:59

品牌	Logo	应用领域
凌特 - Linear		放大器
页数	文件大小	规格书
12页	169K
描述
Very Low Noise, Differential Amplifier and 2.5MHz Lowpass Filter

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Final Electrical Specifications

LT6600-2.5

Very Low Noise, Differential

Amplifier and 2.5MHz Lowpass Filter

June 2003

FEATURES

DESCRIPTIO

Programmable Differential Gain via Two External

The LT^®6600-2.5 combines a fully differential amplifier

with a 4th order 2.5MHz lowpass filter approximating a

Chebyshev frequency response. Most differential amplifi-

ers require many precision external components to tailor

gain and bandwidth. In contrast, with the LT6600-2.5, two

externalresistorsprogramdifferentialgain, andthefilter’s

2.5MHz cutoff frequency and passband ripple are inter-

nallyset.TheLT6600-2.5alsoprovidesthenecessarylevel

shifting to set its output common mode voltage to accom-

modate the reference voltage requirements of A/Ds.

■

Resistors

■

Adjustable Output Common Mode Voltage

■

Operates and Specified with 3V, 5V, ±5V Supplies

■

0.5dB Ripple 4th Order Lowpass Filter with 2.5MHz

Cutoff

■

86dB S/N with 3V Supply and 1V_RMSOutput

■

Low Distortion, 1V_RMS, 800Ω Load

1MHz: 95dBc 2nd, 88dBc 3rd

■

Fully Differential Inputs and Outputs

■

Compatible with Popular Differential Amplifier

Using a proprietary internal architecture, the LT6600-2.5

integrates an antialiasing filter and a differential amplifier/

driver without compromising distortion or low noise

performance. At unity gain the measured in band

signal-to-noise ratio is an impressive 86dB. At higher

gains the input referred noise decreases so the part can

Pinouts

SO-8 Package

■

APPLICATIO S

■

High Speed ADC Antialiasing and DAC Smoothing in

Networking or Cellular Base Station Applications

High Speed Test and Measurement Equipment

Medical Imaging

Drop-in Replacement for Differential Amplifiers

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

process smaller input differential signals without signifi-

cantly degrading the output signal-to-noise ratio.

■

The LT6600-2.5 also features low voltage operation. The

differential design provides outstanding performance for

a4V_P-Psignallevelwhilethepartoperateswithasingle3V

supply. The LT6600-2.5 is available in an SO-8 package.

For similar devices with higher cutoff frequency, refer to

the LT6600-10 and LT6600-20 data sheets.

TYPICAL APPLICATIO

Amplitude Response

= ±2.5V

–12

–24

–36

–48

–60

–72

–84

–96

0.1µF

1580Ω

–

OUT

LT6600-2.5

0.01µF

1580Ω

OUT

660025 TA01a

100k

10M

50M

FREQUENCY (Hz)

660025 TA01b

660025i

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.

12 3 4 5 6 7...12

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