参数资料
型号: LTC1562AIG#TR
厂商: Linear Technology
文件页数: 9/28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)
17
LTC1562
1562fa
(Basic)
TYPICAL APPLICATIONS
U
Amplitude Response
8th Order Bandpass Filter, Single 5V Supply,
– 1dB Bandwidth =
Center Frequency
10
FREQUENCY (kHz)
60
GAIN
(dB)
–30
–10
10
124
1562 TA06b
–50
–70
–40
–20
0
–60
–80
–90
76
92
108
68
132
84
100
116
140
fCENTER = 100kHz
R21 = R23 = 11.7k
Quick Design Formulas for a Center Frequency fC (Recommended Range 50kHz to 120kHz):
2
100kHz
C
RIN1 = RIN3 =
R21
2.56
R22 = R24 = 8.66k
100kHz
C
C + 1736kHz
100kHz
RIN2 = RIN4 =
RQ2
14.36
C + 634kHz
100kHz
Notes: R21 and RQ2 should be rounded to the nearest standard finite-tolerance value before using these values in
the later formulas. For fC < 100kHz, the maximum peak-to-peak passband input level is (fC/100kHz)5V. Use
LTC1562A for minimum variation of passband gain.
Example: Center frequency fC of 100kHz. The formulas give R21 = R23 = 11.7k, nearest standard 1% value 11.5k.
This value gives RIN1 = RIN3 = 82.46k, nearest 1% value 82.5k. RQ1 = RQ3 = 65.5k, nearest 1% value 64.9k.
R22 = R24 = 8.66k, already a standard 1% value. This gives RIN2 = RIN4 = 32.4k (again already a standard 1% value).
RQ2 = RQ4 = 63.45k, nearest 1% value 63.4k. If LTC1562A is used, resistor tolerances tighter than 1% will further
improve the passband gain accuracy.
RQ1 = RQ3 = 215.5k
100kHz
C
100kHz
C
1562 TA06 TABLE
100kHz
C + 229kHz
RQ2 = RQ4 = 286.2k
100kHz
C + 351kHz
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
VIN
VOUT
1562 TA06a
RIN3
5V
RQ1
R21
R23
0.1
F
1
F
RQ3
R24
RQ4
RQ2
R22
SCHEMATIC INCLUDES PIN NUMBERS FOR 20-PIN PACKAGE.
PINS 4, 7, 14, 17 (NOT SHOWN) ALSO CONNECT TO V
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