參數(shù)資料
型號(hào)： LTC1264CSW
廠商： LINEAR TECHNOLOGY CORP
元件分類： 運(yùn)動(dòng)控制電子
英文描述： High Speed, Quad Universal Filter Building Block
中文描述： QUAD SWITCHED CAPACITOR FILTER, BUTTERWORTH/CHEBYSHEV, UNIVERSAL, PDSO24
封裝： 0.300 INCH, PLASTIC, SOP-24
文件頁數(shù)： 1/16頁
文件大?。?/td> 227K
代理商： LTC1264CSW
1
LTC1264
1264fb
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
High Speed, Quad Universal
Filter Building Block
■
High Speed, Up to 250kHz Center Frequency
■
Four Identical Filters in a 0.3" Wide Package
■
Clock-to-Center Frequency Ratio of 20:1
■
Double-Sampling, Improved Aliasing
■
Operates from
±
2.37V to
±
8V Power Supplies
■
Customized Version with Internal Resistors Available
■
Low Noise
■
Low Harmonic Distortion
■
Available in 24-Pin DIP and SO Wide Packages
The LTC
1264 consists of four identical, high speed 2nd
order switched-capacitor filter building blocks designed
for center frequencies up to 250kHz. Each building block,
together with three to five resistors, can provide 2nd order
functions like lowpass, highpass, bandpass and notch.
The center frequency of each 2nd order section is tuned via
an external clock. The clock-to-center frequency ratio is
internally set to 20:1, but it can be modified via external
resistors.
The aliasing performance of the LTC1264 is improved by
double-sampling each 2nd order section. Input signal
frequencies can reach up to twice the clock frequency
before any alias products will be detectable.
For Q
≤
5 and for T
A
< 85
°
C, the maximum center
frequency is 160kHz. For Q
≤
2, the maximum center
frequency is 250kHz. Up to 8th order filters can be realized
by cascading all four 2nd order sections.
A customized monolithic version of the LTC1264 includ-
ing internal thin film resistors can be obtained.
■
Digital Communications
■
Spread Spectrum Communications
■
Spectral Analysis
■
Loran Receivers
■
Instrumentation
50k
10k
50k
10k
IN
1264 TA01
OUT
INV B
HPB/NB
BPB
LPB
SB
AGND
V
+
SA
LPA
BPA
HPA/NA
INV A
INV C
HPC/NC
BPC
LPC
SC
V
–
CLK
SD
LPD
BPD
HPD/ND
INV D
50k
50k
50k
10k
50k
10k
50k
50k
LTC1264
MAXIMUM
f
CENTER
160kHz
120kHz
60kHz
POWER
SUPPLY
±
7.5V
±
5V
Single 5V
0.1
μ
F
f
CLK
0.1
μ
F
Clock-Tunable 8th Order Bandpass Filter, f
CENTER
= f
CLK
/20
FREQUENCY (Hz)
10k
G
10
0
–10
–20
–30
–40
–50
–60
–70
–80
100k
1M
1264 TA02
Gain vs Frequency
100kHz Bandpass, f
–3dB
Bandwidth = f
CENTER
/10
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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