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参数资料
| 型号： | MAX260BENG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/26页 |
| 文件大小： | 0K |
| 描述： | IC FILTER ACT MPU PROG 24-DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 15 |
| 滤波器类型： | 通用开关电容器 |
| 频率 - 截止或中心： | 7.5kHz |
| 滤波器数： | 2 |
| 滤波器阶数： | 2nd |
| 电源电压： | 4.74 V ~ 12.6 V，±2.37 V ~ 6.3 V |
| 安装类型： | 通孔 |
| 封装/外壳： | 24-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 24-PDIP |
| 包装： | 管件 |
MAX260/MAX261/MAX262
Microprocessor Programmable
Universal Active Filters
24
______________________________________________________________________________________
In Figure 23, a series of response curves are shown for
the previous configuration using a MAX261 with clock
frequencies ranging from 750kHz to 4MHz (f0 from
500Hz to 30kHz). Note that the rightmost curve shows
about 2dB of gain peaking compared to the lower fre-
quency curves, indicating the upper limit of usable filter
accuracy at this Q (see Table 1).
Wide Passband Chebyshev Bandpass
In this example (Figure 24), the desired parameters
are:
Center frequency (f0)
= 1kHz
Pass bandwidth
= 1kHz
Stop bandwidth
= 3kHz
Max passband ripple
= 1dB
Min stopband attenuation
= 20dB
From the previous parameters, we use either lookup
tables, design texts, or Maxim's filter design programs
to generate the order (number of poles), and the f0 and
Q of each second-order section. The A and B parame-
ters are:
f0A = 639Hz
f0B = 1564Hz
QA = 2.01
QB = 2.01
To implement this filter, section A operates in mode 1
and section B uses mode 2 to provide a wider overall
range of fCLK/f0 ratios. This way, one clock frequency
can drive both sections A and B. See Tables 2 and 3.
CLKA = CLKB = 120kHz
fCLK/f0A = 188.49 (Mode 1, N = 56), actual f0A = 636.6Hz
fCLK/f0B = 76.64 (Mode 2, N = 5), actual f0B = 156.5Hz
QA = 2.000 (Mode 1, N = 96), QB = 2.01 (Mode 2, N =
83)
The overall passband gain at f0 is 0.64V/V or
-3.9dB.
High-Frequency Chebyshev Bandpass
The same Chebyshev response shape shown in Figure
24 is implemented at higher frequencies with a
MAX262 in Figure 25. The curves show plots for center
frequencies of 15.6kHz, 31.3kHz, and 47kHz. Not only
is this faster than the MAX260 implementation, but
mode 1 can be used in both halves of the MAX262 for
this filter because the range of available fCLK/f0 ratios is
wider with the MAX262 than the MAX260.
51
11
12
23
21
MAX260
VIN
INA
BPA
CLKA
CLK
PROGRAM
CLKB
INB
BPB
WR, AX, DX
VOUT
40
-60
200
2K
1K
500
20K
10K
5K
-35
FREQUENCY (Hz)
GAIN
(dB)
PHASE
(DEGREES)
-10
15
-180
180
90
0
-90
GAIN
PHASE
Figure 22. Fourth-Order Chebyshev Bandpass Filter
CLKA,B
MODE
fOA
fOB
QA
QB
150kHz
1
N = 42
N = 23
N = 119
30
-30
1K
10K
5K
2K
100K
50K
20K
-15
FREQUENCY (Hz)
GAIN
(dB)
0
15
Figure 23. MAX261 Fourth-Order Chebyshev Bandpass Using
Coefficients of Figure 22
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX260BENG+ | 功能描述:有源滤波器 MPU Programmable Univ Active Filter RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX260BEWG | 功能描述:有源滤波器 RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX260BEWG+ | 功能描述:有源滤波器 MPU Programmable Univ Active Filter RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX260BEWG+T | 功能描述:有源滤波器 MPU Programmable Univ Active Filter RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX260BEWG-T | 功能描述:有源滤波器 RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
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