参数资料
型号: LTC1562ACG#TR
厂商: Linear Technology
文件页数: 6/28页
文件大小: 0K
描述: IC FILTER UNIV RC QUAD LN 20SSOP
标准包装: 1,800
滤波器类型: 通用连续计时
频率 - 截止或中心: 150kHz
滤波器数: 4
滤波器阶数: 8th
电源电压: 4.75 V ~ 10.5 V,±4.75 V ~ 5.25 V
安装类型: 表面贴装
封装/外壳: 20-SSOP(0.209",5.30mm 宽)
供应商设备封装: 20-SSOP
包装: 带卷 (TR)
14
LTC1562
1562fa
TYPICAL APPLICATIONS
U
(Basic)
1
2
3
5
6
8
9
10
20
19
18
16
15
13
12
11
INV B
V1 B
V2 B
V+
SHDN
V2 A
V1 A
INV A
INV C
V1 C
V2 C
V
AGND
V2 D
V1 D
INV D
LTC1562
RIN2
RIN4
RIN1
VIN2
VIN1
SCHEMATIC INCLUDES PIN NUMBERS FOR 20-PIN PACKAGE.
PINS 4, 7, 14, 17 (NOT SHOWN) ALSO CONNECT TO V
VOUT1
1562 TA03a
VOUT2
RIN3
–5V
5V
RQ1
R21
R23
0.1
F
0.1
F
RQ3
R24
RQ4
RQ2
R22
Dual 4th Order Lowpass Filters
Amplitude Response
FREQUENCY (Hz)
10k
GAIN
(dB)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
100k
1M
1562 TA03b
BUTTERWORTH
f –3dB = 100kHz
10k
R21, R23, RIN1, RIN3 =
Quick Design Formulas for Some Popular Response Types:
2
100kHz
C
Butterworth
(Maximally Flat Passband)
for fC 10kHz to 140kHz
14.24k
2
100kHz
C
Chebyshev
(Equiripple Passband)
for fC 20kHz to 120kHz
3.951k
2
100kHz
C
Bessel
(Good Transient Response)
for fC 10kHz to 70kHz
5.412k
RQ1, RQ3 =
100kHz
C
7.26k
100kHz
C
5.066k
100kHz
C
10k
R22, R24, RIN2, RIN4 =
2
100kHz
C
7.097k
2
100kHz
C
4.966k
2
100kHz
C
13.07k
RQ2, RQ4 =
Notes: fC is the cutoff frequency: For Butterworth and Bessel, response is 3dB down at fC. For Chebyshev filters with
±0.1dB passband ripple up to 0.95 fC, use LTC1562 “A” grade.
Example: Butterworth response, fC = 50kHz. from the formulas above, R21 = R23 = RIN1 = RIN3 = 10k(100kHz/50kHz)2
= 40k. RQ1 = RQ3 = 5.412k(100kHz/50kHz) = 10.82k. R22 = R24 = RIN2 = RIN4 = 10k(100kHz/50kHz)2 = 40k.
RQ2 = RQ4 = 13.07k(100kHz/50kHz) = 26.14k. Use nearest 1% values.
100kHz
C
17.53k
100kHz
C
3.679k
100kHz
C
1562 TA03 TABLE
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