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LTC1164-7CS PDF预览

LTC1164-7CS

更新时间: 2024-02-03 05:08:34
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
12页 302K
描述
Low Power, Linear Phase 8th Order Lowpass Filter

LTC1164-7CS 数据手册

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LTC1164-7  
Low Power, Linear Phase  
8th Order Lowpass Filter  
U
DESCRIPTIO  
EATURE  
S
F
Better Than Bessel Roll-Off  
The LTC1164-7 is a low power, clock-tunable monolithic  
8th order lowpass filter with linear passband phase and  
flat group delay. The amplitude response approximates a  
maximally flat passband and exhibits steeper roll-off than  
an equivalent 8th order Bessel filter. For instance, at twice  
the cutoff frequency the filter attains 34dB attenuation  
(vs12dB for Bessel), while at three times the cutoff fre-  
quency the filter attains 68dB attenuation (vs 30dB for  
Bessel). The cutoff frequency of the LTC1164-7 is tuned  
via an external TTL or CMOS clock.  
fCUTOFF up to 20kHz, Single 5V Supply  
ISUPPLY = 2.5mA (Typ), Single 5V Supply  
75dB THD + Noise with Single 5V Supply  
Phase and Group Delay Response Fully Tested  
Transient Response with No Ringing  
Wide Dynamic Range  
No External Components Needed  
O U  
PPLICATI  
A
S
Low power is achieved without sacrificing dynamic range.  
With single 5V supply, the S/N + THD is up to 75dB.  
Optimum 91dB S/N is obtained with ±7.5V supplies.  
Data Communication Filters  
Time Delay Networks  
Phase Matched Filters  
The clock-to-cutoff frequency ratio of the LTC1164-7 can  
be set to 50:1 (pin 10 to V+) or 100:1 (pin 10 to V).  
When the filter operates at the clock-to-cutoff frequency  
ratio of 50:1, the input is double-sampled to lower the risk  
of aliasing.  
The LTC1164-7 is pin-compatible with the LTC1064-X  
series and LTC1264-7.  
U
O
TYPICAL APPLICATI  
Frequency Response  
10kHz Linear Phase Lowpass Filter  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
GAIN  
150  
140  
130  
120  
110  
100  
90  
0
–10  
–20  
–30  
–40  
–50  
–60  
–70  
–80  
V
IN  
–5V  
LTC1164-7  
CLK = 500kHz  
5V  
5V  
DELAY  
V
OUT  
8
80  
NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED  
BY A 0.1µF CAPACITOR CLOSE TO THE PACKAGE  
AND ANY PRINTED CIRCUIT BOARD ASSEMBLY  
SHOULD MAINTAIN A DISTANCE OF AT LEAST 0.2  
INCHES BETWEEN ANY OUTPUT OR INPUT PIN AND  
70  
1
10  
FREQUENCY (kHz)  
100  
THE f  
LINE.  
1164-7 TA01  
CLK  
1164-7 TA02  
1

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