參數(shù)資料
型號(hào)： MAX262BENG+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 17/26頁(yè)
文件大?。?/td> 0K
描述： IC FILTER ACT MPU PROG 24-DIP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 15
濾波器類型： 通用開(kāi)關(guān)電容器
頻率 - 截止或中心： 140kHz
濾波器數(shù)： 2
濾波器階數(shù)： 2nd
電源電壓： 4.74 V ~ 12.6 V，±2.37 V ~ 6.3 V
安裝類型： 通孔
封裝/外殼： 24-DIP（0.300"，7.62mm）
供應(yīng)商設(shè)備封裝： 24-PDIP
包裝： 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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX262BENG+ 功能描述:有源濾波器 MPU Programmable Universal RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX262BEWG 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX262BEWG+ 功能描述:有源濾波器 MPU Programmable Universal RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX262BEWG+T 功能描述:有源濾波器 MPU Programmable Universal RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
MAX262BEWG-T 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube
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