MAXIM MAX291, MAX292, MAX295, MAX296 User Manual
MAX291, MAX292, MAX295, MAX296 八阶、低通、开关电容滤波器 - 概述
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Maxim > 产品 > 滤波器(模拟) > MAX291, MAX292, MAX295, MAX296
MAX291, MAX292, MAX295, MAX296
八阶、低通、开关电容滤波器
请参考MAX7401/MAX7405 8阶、低功耗贝塞尔滤波器
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状况：生产中。
概述
The MAX291/MAX292/MAX295/MAX296 are easy -to- use, 8th-order, lowpass, switched -capacitor filters that
can be set up with corner frequencies from 0.1Hz to 25kHz (MAX291/MAX292) or 0.1Hz to 50kHz
(MAX295/MAX296).
The MAX291/MAX295 Butterworth filters provide maximally flat passband response, and the
MAX292/MAX296 Bessel filters provide low overshoot and fast settling. All four filters have fixed responses, so the design task is limited to
selecting the clock frequency that controls the filter's corner frequency.
完整的数据资料
英文
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Rev. 4 (PDF, 196kB)
An external capacitor is used to generate a clock using the internal oscillator, or an external clock signal can be used. An uncommitted operational
amplifier (noninverting input grounded) is provided for building a continuous time lowpass filter for post - filtering or anti-aliasing.
Produced in an 8- pin DIP/SO and a 16-pin wide SO package, and requiring a minimum of external components, the MAX291 series delivers very
aggressive performance from a tiny area.
关键特性 应用/使用
8th-Order Lowpass Filters:
Butterworth (MAX291/MAX295)
Bessel (MAX292/MAX296)
Clock- Tunable Corner - Frequency Range:
50Hz/60Hz电源噪声滤波
ADC抗混叠滤波器
DAC后置滤波
噪声分析
0.1Hz to 25kHz (MAX291/MAX292)
0.1Hz to 50kHz (MAX295/MAX296)
No External Resistors or Capacitors Required
Internal or External Clock
Clock to Corner Frequency Ratio:
100:1 (MAX291/MAX292)
50:1 (MAX295/MAX296)
Low Noise: -70dB THD + Noise (Typ)
Operate with a Single +5V Supply or Dual ±5V Supplies
Uncommitted Op Amp for Anti -Aliasing or Clock- Noise Filtering
8-Pin DIP and SO Packages
Key Specifications: Active Filters
25
V
SUPPLY
(Dual)
(±V)
5 5
V
SUPPLY
(V)
Oper. Temp.
(°C)
-55 to +125
-40 to +85
0 to +70
Price
See
Notes
$2.95
@1k
$2.95
@1k
$2.95
@1k
Lowest
Cutoff
Part
Number
Filter
Sections
Order
Per
Filter
Filter
Class
Filter
Type
Filter
Characteristic
Program
Method
Section
MAX291
MAX292 Bessel 25
1 8
MAX295 Butterworth 50
Switched
Cap
Lowpass
Butterworth
Clock 0.1
Highest
Cutoff
(Hz)
(kHz)
max min Dual
http://china.maxim-ic.com/datasheet/index.mvp/id/1370[2010-08-31 8:33:14]
MAX291, MAX292, MAX295, MAX296 八阶、低通、开关电容滤波器 - 概述
$2.95
MAX296 Bessel 50
查看所有Active Filters (50)
图表
典型工作电路
注释、注解
Single 8th- order, lowpass, switched - capacitor filter
@1k
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软件/模型
参考文献： 19-4526 Rev. 4; 2009-09-03
本页最后一次更新: 2010- 04-20
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© 2010 Maxim Integrated Products 版权所有
http://china.maxim-ic.com/datasheet/index.mvp/id/1370[2010-08-31 8:33:14]
General Description
The MAX291/MAX292/MAX295/MAX296 are easy-to-use,
8th-order, lowpass, switched-capacitor filters that can be
set up with corner frequencies from 0.1Hz to 25kHz
(MAX291/MAX292) or 0.1Hz to 50kHz (MAX295/MAX296).
The MAX291/MAX295 Butterworth filters provide maximally flat passband response, and the MAX292/MAX296
Bessel filters provide low overshoot and fast settling. All
four filters have fixed responses, so the design task is
limited to selecting the clock frequency that controls the
filter’s corner frequency.
An external capacitor is used to generate a clock using
the internal oscillator, or an external clock signal can be
used. An uncommitted operational amplifier (noninverting
input grounded) is provided for building a continuoustime lowpass filter for post-filtering or anti-aliasing.
Produced in an 8-pin DIP/SO and a 16-pin wide SO
package, and requiring a minimum of external components, the MAX291 series delivers very aggressive performance from a tiny area.
Applications
ADC Anti-Aliasing Filter
Noise Analysis
DAC Post-Filtering
50Hz/60Hz Line-Noise Filtering
Features
o 8th-Order Lowpass Filters:
Butterworth (MAX291/MAX295)
Bessel (MAX292/MAX296)
o Clock-Tunable Corner-Frequency Range:
0.1Hz to 25kHz (MAX291/MAX292)
0.1Hz to 50kHz (MAX295/MAX296)
o No External Resistors or Capacitors Required
o Internal or External Clock
o Clock to Corner Frequency Ratio:
100:1 (MAX291/MAX292)
50:1 (MAX295/MAX296)
o Low Noise: -70dB THD + Noise (Typ)
o Operate with a Single +5V Supply or
Dual ±5V Supplies
o Uncommitted Op Amp for Anti-Aliasing or Clock-
Noise Filtering
o 8-Pin DIP and SO Packages
8th-Order, Lowpass,
Switched-Capacitor Filters
________________________________________________________________
Maxim Integrated Products
1
19-4526; Rev 5; 5/10
MAX291/MAX292/MAX295/MAX296
Ordering Information
Pin Configurations
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
** Contact factory for availability and processing to MIL-STD-883.
PART TEMP. RANGE PIN-PACKAGE
MAX291CPA
MAX291CWE
0°C to +70°C 8 Plastic DIP
MAX291C/D 0°C to +70°C
0°C to +70°C 16 Wide SO
Dice*
MAX291EPA -40°C to +85°C 8 Plastic DIP
MAX291EWE
MAX291MJA -55°C to +125°C
-40°C to +85°C 16 Wide SO
8 CERDIP**
16-pin Wide SO at end of data sheet.
MAX291CSA 0°C to +70°C 8 SO
MAX291ESA -40°C to +85°C 8 SO
Typical Operating Circuit
Pin Configuration is 8-pin DIP/SO.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+5V
7
INPUT IN
CLOCK CLK
8
1
6
V+
MAX29_
V-
2
-5V
5
OUT OUTPUT
3
OP OUT
4
OP IN-
TOP VIEW
CLK
V-
OP OUT
OP IN-
1
2
MAX29_
3
4
DIP/SO
8
IN
7
V+
6
GND
5
OUT
MAX291/MAX292/MAX295/MAX296
8th-Order, Lowpass,
Switched-Capacitor Filters
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V+ = 5V, V- = -5V, filter output measured at OUT pin, 20kΩ load resistor to ground at OUT and OP OUT, f
CLK
= 100kHz
(MAX291/MAX292) or f
CLK
= 50kHz (MAX295/MAX296), TA= T
MIN
to T
MAX
, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (V+ to V-).......................................................12V
Input Voltage at Any Pin.............V- + (-0.3V) ≤ V
IN
≤ V+ + (0.3V)
Continuous Power Dissipation
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C) ....762mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C)........640mW
Operating Temperature Ranges
MAX29_C_ _........................................................0°C to +70°C
MAX29_E_ _ .....................................................-40°C to +85°C
MAX29_MJA ..................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+240°C
MAX295/MAX296
MAX291/MAX292
MAX296
MAX295
MAX291/MAX292
MAX295/MAX296
MAX291
MAX292
CONDITIONS
Hz
0.1-50k
Corner-Frequency Range
0.1-25k
-0.02 -0.1
60
Clock to Corner
Frequency Tempco
5
100:1
50:1
Clock to Corner
Frequency Ratio
10
40
UNITSMIN TYP MAXPARAMETER
fIN= 0.50 F
o
fIN= 1.00 F
o
-2.2 -2.7 -3.2
MAX291
fIN= 3.00 F
o
-70.0 -76.0
fIN= 2.00 F
o
-43.0 -48.0
fIN= 0.50 F
o
-0.6 -0.8 -1.0
fIN= 2.00 F
o
-11.0 -13.0 -15.0
fIN= 1.00 F
o
-2.7 -3.0 -3.3
fIN= 0.25 F
o
-0.1 -0.2 -0.3
fIN= 3.00 F
o
-30.0 -34.0
MAX292
fIN= 6.00 F
o
-74.0 -78.0
fIN= 4.00 F
o
-47.0 -51.0
fIN= 1.00 F
o
-2.2 -2.7 -3.2
MAX295
fIN= 3.00 F
o
-70.0 -76.0
fIN= 2.00 F
o
-43.0 -48.0
fIN= 0.50 F
o
fIN= 0.50 F
o
-0.6 -0.8 -1.0
fIN= 2.00 F
o
-11.0 -13.0 -15.0
fIN= 1.00 F
o
-2.7 -3.0 -3.3
fIN= 0.25 F
o
-0.1 -0.2 -0.3
fIN= 3.00 F
o
-30.0 -34.0
MAX296
fIN= 6.00 F
o
-74.0 -78.0
Insertion Gain Relative to
DC Gain
fIN= 4.00 F
o
-47.0 -51.0
-0.02 -0.1
dB
ppm/°C
FILTER CHARACTERISTICS
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