參數(shù)資料
型號(hào)： MAX261BEWG+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 18/26頁(yè)
文件大小： 0K
描述： IC FILTER ACT MPU PROG 24-SOIC
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 30
濾波器類(lèi)型： 通用開(kāi)關(guān)電容器
頻率 - 截止或中心： 57kHz
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(lèi)型： 表面貼裝
封裝/外殼： 24-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 24-SOIC W
包裝： 管件
MAX260/MAX261/MAX262
Microprocessor Programmable
Universal Active Filters
______________________________________________________________________________________
25
Fourth-Order Butterworth Lowpass
Figure 26 shows a fourth-order Butterworth lowpass
with a cutoff frequency of 3kHz. Sections A and B of a
MAX260 are cascaded. The f0 and Q parameters for
each section are:
f0A = 3kHz
f0B = 3kHz
QA = 1.307
QB = 0.541
Mode 1 and a 400kHz clock are used. Because of low
Q values, the sampling errors of Figure 20 begin to look
significant in this case. From the graphs, using fCLK/f0
ratio near 133, f0A is about 4% high, f0B is 1.5% high,
QA is -1.2% low, and QB is -0.5% low. If these errors
are not a problem, the corrections can be ignored.
They are included here for best possible accuracy:
CLKA = CLKB = 400kHz
fCLK/f0A = 135.08 (N = 22), f0B = 2961Hz
(-1.3% correction)
fCLK/f0B = 139.80 (N = 25), f0A = 2861Hz
(-4.6% correction)
QA = 1.306 (N = 79, Q resolution prevents +0.5%
correction)
QB = 0.547 (N = 11 +1.1% correction)
Measured wideband noise for this filter is 123V RMS.
If mode 2 were used, the noise would be 87V RMS.
For lower noise with either mode, the first section
should have the highest Q (section A in this example).
51
11
12
23
21
MAX260
VIN
INA
BPA
CLKA
CLK
PROGRAM
CLKB
INB
BPB
WR, AX, DX
VOUT
10
-70
100
1K
500
200
10K
5K
2K
-50
FREQUENCY (Hz)
GAIN
(dB)
-30
-10
-180
180
90
PHASE
(DEGREES)
0
-90
GAIN
PHASE
Figure 24. Wide Passband Chebyshev Bandpass Filter
CLKA,B MODEA MODEB
fOA
fOB
QA
QB
120kHz
1
2
N = 56 N = 5 N = 96
N = 83
51
11
12
23
21
MAX262
VIN
INA
BPA
CLKA
CLK
PROGRAM
CLKB
INB
BPB
WR, AX, DX
VOUT
0
-50
1K
10K
5K
2K
100K
50K
20K
-40
-30
FREQUENCY (Hz)
GAIN
(dB)
-20
-10
fO = 15.6kHz
fCLK = 1MHz
fO = 31.3kHz
fCLK = 2MHz
fO = 47kHz
fCLK = 3MHz
Figure 25. High-Frequency Chebyshev Bandpass Filter
CLKA,B
MODE
fOA
fOB
QA
QB
1 to 3MHz
1
N = 38
N = 0
N = 96
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參數(shù)描述
MAX261BEWG+ 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
MAX261BEWG+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
MAX261BEWG-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
MAX261BMRG 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
MAX2620E/D 制造商:Maxim Integrated Products 功能描述:10MHZ TO 1050MHZ INTEGRATED RF OSCILLATOR WITH BUFFERED OUTP - Gel-pak, waffle pack, wafer, diced wafer on film
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