參數(shù)資料
型號: LTC1563-3IGN#TRPBF
廠商: Linear Technology
文件頁數(shù): 5/20頁
文件大?。?/td> 0K
描述: IC FILTER LP RC 4TH ORDER 16SSOP
標準包裝: 2,500
濾波器類型: 巴特沃斯,低通開關(guān)電容器
頻率 - 截止或中心: 256kHz
濾波器數(shù): 1
濾波器階數(shù): 4th
電源電壓: 2.7 V ~ 11 V,±2.7 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SSOP
包裝: 帶卷 (TR)
13
LTC1563-2/LTC1563-3
156323fa
Figure 5. 4th Order Filter Connections (Power Supply, Ground,
EN and LP Connections Not Shown for Clarity). Table 1 Shows
Resistor Values
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LP
SA
NC
INVA
NC
LPA
AGND
V
V+
LPB
NC
INVB
NC
SB
NC
EN
VOUT
LTC1563-2
VIN
1563 F05
R31
R32
R22
R21
R11
R12
4th Order Filter Responses Using the LTC1563-2
FREQUENCY (Hz)
0.1
GAIN
(dB)
–20
–40
–60
–80
–90
10
0
10
1
1563 F05a
NORMALIZED TO fC = 1Hz
BUTTERWORTH
0.5dB RIPPLE
CHEBYSHEV
0.1dB RIPPLE
CHEBYSHEV
Figure 5a. Frequency Response
FREQUENCY (Hz)
0.1
GAIN
(dB)
–2
–4
–6
–8
–10
1
0
2
1
1563 F05b
BUTTERWORTH
0.5dB RIPPLE
CHEBYSHEV
0.1dB RIPPLE
CHEBYSHEV
NORMALIZED TO fC = 1Hz
Figure 5b. Passband Frequency Response
TIME (s)
0
OUTPUT
VOLTAGE
(V)
1.2
1.0
0.8
0.6
0.4
0.2
0
1.0
0.5
1.5
2.0
1563 F05c
2.5
3.0
BUTTERWORTH
0.5dB RIPPLE
CHEBYSHEV
0.1dB RIPPLE
CHEBYSHEV
NORMALIZED TO fC = 1Hz
Figure 5c. Step Response
Table 1. Resistor Values, Normalized to 256kHz Cutoff Frequency (fC), Figure 5. The Passband
Gain, of the 4th Order LTC1563-2 Lowpass Filter, Is Set to Unity. (Note 1)
0.1dB RIPPLE
0.5dB RIPPLE
BUTTERWORTH
CHEBYSHEV
LP Mode Max fC
25.6kHz
15kHz
13kHz
HS Mode Max fC
256kHz
135kHz
113kHz
R11 = R21 =
10k(256kHz/fC)
13.7k(256kHz/fC)
20.5k(256kHz/fC)
R31 =
10k(256kHz/fC)
10.7k(256kHz/fC)
12.4k(256kHz/fC)
R12 = R22 =
10k(256kHz/fC)
12.1k(256kHz/fC)
R32 =
10k(256kHz/fC)
6.81k(256kHz/fC)
6.98k(256kHz/fC)
Example: In HS mode, 0.1dB ripple Chebyshev, 100kHz cutoff frequency, R11 = R21 = 35k
34.8k (1%),
R31 = 27.39k
27.4k (1%), R12 = R22 = 256k 255k (1%), R32 = 17.43k 17.4k (1%)
Note 1: The resistor values listed in this table provide good approximations of the listed transfer functions. For the
optimal resistor values, higher gain or other transfer functions, use FilterCAD Version 3.0 (or newer) or contact the
Linear Technology Filter Applications group for assistance.
APPLICATIONS INFORMATION
WU
U
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