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LTC1563-3CGN#TRPBF PDF预览

LTC1563-3CGN#TRPBF

更新时间: 2024-01-18 23:02:35
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LTC1563-2/LTC1563-3  
Active RC, 4th Order  
Lowpass Filter Family  
U
DESCRIPTIO  
FEATURES  
The LTC®1563-2/LTC1563-3 are a family of extremely  
easy-to-use, active RC lowpass filters with rail-to-rail  
inputs and outputs and low DC offset suitable for systems  
with a resolution of up to 16 bits. The LTC1563-2, with a  
single resistor value, gives a unity-gain Butterworth  
response. The LTC1563-3, with a single resistor value,  
gives a unity-gain Bessel response. The proprietary  
architecture of these parts allows for a simple resistor  
calculation:  
Extremely Easy to Use—A Single Resistor Value  
Sets the Cutoff Frequency (256Hz < fC < 256kHz)  
Extremely Flexible—Different Resistor Values  
Allow Arbitrary Transfer Functions with or without  
Gain (256Hz < fC < 256kHz)  
Supports Cutoff Frequencies Up to 360kHz Using  
FilterCADTM  
LTC1563-2: Unity-Gain Butterworth Response Uses a  
Single Resistor Value, Different Resistor Values  
Allow Other Responses with or without Gain  
LTC1563-3: Unity-Gain Bessel Response Uses a  
R = 10k (256kHz/fC); fC = Cutoff Frequency  
where fC is the desired cutoff frequency. For many appli-  
cations, this formula is all that is needed to design a filter.  
By simply utilizing different valued resistors, gain and  
other responses are achieved.  
Single Resistor Value, Different Resistor Values  
Allow Other Responses with or without Gain  
Rail-to-Rail Input and Output Voltages  
Operates from a Single 3V (2.7V Min) to ±5V Supply  
Low Noise: 36µVRMS for fC = 25.6kHz, 60µVRMS for  
fC = 256kHz  
fC Accuracy < ±2% (Typ)  
DC Offset < 1mV  
Cascadable to Form 8th Order Lowpass Filters  
Available in Narrow SSOP-16 Package  
The LTC1563-X features a low power mode, for the lower  
frequency applications, where the supply current is re-  
duced by an order of magnitude and a near zero power  
shutdown mode.  
The LTC1563-Xs are available in the narrow SSOP-16  
package (Same footprint as an SO-8 package).  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
FilterCAD is trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
APPLICATIO S  
Discrete RC Active Filter Replacement  
Antialiasing Filters  
Smoothing or Reconstruction Filters  
Linear Phase Filtering for Data Communication  
Phase Locked Loops  
U
TYPICAL APPLICATIO  
Frequency Response  
10  
0
Single 3.3V, 256Hz to 256kHz Butterworth Lowpass Filter  
3.3V  
LTC1563-2  
–10  
0.1µF  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
V
OUT  
+
LP  
V
R = 10k  
= 256kHz  
R
R
–20  
f
C
SA  
LPB  
NC  
–30  
–40  
–50  
–60  
–70  
–80  
NC  
R
R
R = 10M  
= 256Hz  
INVA  
NC  
INVB  
NC  
f
C
LPA  
AGND  
SB  
R
NC  
R
V
EN  
V
IN  
0.1µF  
100  
1k  
10k  
FREQUENCY (Hz)  
100k  
1M  
10k  
R
f
= 256kHz  
C
1563 TA01  
(
)
1563 TA02  
156323fa  
1

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