LTC1164-6MJ 查看數據表（PDF） - Linear Technology

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LTC1164-6MJ

Low Power 8th Order Pin Selectable Elliptic or Linear Phase Lowpass Filter

Linear Technology 

LTC1164-6

Low Power 8th Order

Pin Selectable Elliptic or

Linear Phase Lowpass Filter

FEATURES

■ 8th Order Pin Selectable Elliptic or Bessel Filter

■ 4mA Supply Current with ±5V Supplies

■ 64dB Attenuation at 1.44 fCUTOFF (Elliptic Response)

■ fCUTOFF Up to 30kHz (50:1 fCLK to fCUTOFF Ratio)

■ 110µVRMS Wideband Noise with ±5V Supplies

■ Operates at Single 5V Supply with 1VRMS

Input Range

■ Operates Up to ±8V Supplies

■ TTL/CMOS Compatible Clock Input

■ No External Components

■ Available in 14-Pin Dip and 16-Pin SO Wide Packages

U

APPLICATIO S

■ Antialiasing Filters

■ Battery-Operated Instruments

■ Telecommunication Filters

DESCRIPTIO

The LTC®1164-6 is a monolithic 8th order elliptic lowpass

filter featuring clock-tunable cutoff frequency and low

power supply current. Low power operation is achieved

without compromising noise or distortion performance.

At ±5V supplies the LTC1164-6 uses only 4mA supply

current while keeping wideband noise below 110µVRMS.

With a single 5V supply, the LTC1164-6 can provide up to

10kHz cutoff frequency and 80dB signal-to-noise ratio

while consuming only 2.5mA.

The LTC1164-6 provides an elliptic lowpass rolloff with

stopband attenuation of 64dB at 1.44 fCUTOFF and an fCLK-

to-fCUTOFF ratio of 100:1 (Pin 10 to V –). For a ratio of 100:1,

fCUTOFF can be clock-tuned up to 10kHz. For a fCLK-to-

fCUTOFF ratio of 50:1 (Pin 10 to V +), the LTC1164-6

provides an elliptic lowpass filter with fCUTOFF frequencies

up to 20kHz. When Pin 10 is connected to ground, the

LTC1164-6 approximates an 8th order linear phase re-

sponse with 65dB attenuation at 4.5 f –3dB and fCLK / f –3dB

ratio of 160:1. The LTC1164-6 is pin compatible with the

LTC1064-1.

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

All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

10kHz Anti-Aliasing Elliptic Filter

NC 1

14

VIN 2

13

3

12

8V

4 LTC1164-6 11

5

10

6

9

7

8

NC

–8V

CLK = 1MHz

–8V

VOUT

1164-6 TA01

WIDEBAND NOISE = 115µVRMS

NOTE: THE CONNECTION FROM PIN 7 TO PIN 14 SHOULD BE MADE

UNDER THE PACKAGE. THE POWER SUPPLIES SHOULD BE BYPASSED

BY A 0.1µF CAPACITOR AS CLOSE TO THE PACKAGE AS POSSIBLE.

Frequency Response

0

–10

– 20

– 30

– 40

– 50

– 60

– 70

– 80

1

10

FREQUENCY (kHz)

100

1164-6 TA02

11646fa

1

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