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參數(shù)資料
| 型號： | MAX261BEWG+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 17/26頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC FILTER ACT MPU PROG 24-SOIC |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1,000 |
| 濾波器類型： | 通用開關電容器 |
| 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 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 24-SOIC W |
| 包裝： | 帶卷 (TR) |
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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| MAX2620E/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX2620EUA | 功能描述:VCO振蕩器 10MHz - 1050MHz RF Oscillator RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
| MAX2620EUA+ | 功能描述:VCO振蕩器 10MHz - 1050MHz RF Oscillator RoHS:否 制造商:Exar 封裝 / 箱體:SOIC-14 頻率:300 kHz 負載電容: 封裝:Reel 電源電壓:4.5 V to 20 V 尺寸:4 mm W x 8.75 mm L x 1.75 mm H 最小工作溫度:0 C 最大工作溫度:+ 70 C |
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