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AN737
| Title |
Title
Using Digital Potentiometers to Design Low Pass Adjustable Filters
|
|---|---|
| Name |
Name
AN737
|
| Date |
Date
06/24/2015
|
| Application Categories |
Application Categories
Medical /
Homecare Pulse Oximeter
Signal Conditioning & Measurement /
ADC
Signal Conditioning & Measurement /
Amplification (Op Amps)
Signal Conditioning & Measurement /
Digital Potentiometer
Signal Conditioning & Measurement /
Temperature Sensing
|
| Product Categories |
Product Categories
Mixed Signal /
Digital Potentiometers
|
| Description |
Description
The most common filter found in a data acquisition system signal path is a low pass filter. This type of filter is usually used to reduce A/D converter aliasing errors. If there is more than one signal that is applied to the A/D converter through a multiplexer, each signal source may have its own set of filter requirements, i.e. settling time, fast transition region, etc. Consequently, a variety of filters may be required in the circuit prior to the multiplexer. Usually these filters are implemented with operational amplifiers, combined with fixed resistors and capacitors.
|
Silicon Products
| Title | Product | Title |
|---|---|---|
|
MCP4261
8-Bit Dual Digital POT with NVM and SPI
|
MCP4261 | 8-Bit Dual Digital POT with NVM and SPI |
|
MCP4452
8-Bit Quad Digital POT with I2C™
|
MCP4452 | 8-Bit Quad Digital POT with I2C™ |
|
MCP4661
8-Bit Dual Digital POT with NVM and I2C™
|
MCP4661 | 8-Bit Dual Digital POT with NVM and I2C™ |
|
MCP45HV31
7-Bit Single, +36V (±18V) Digital POT w/I2C™
|
MCP45HV31 | 7-Bit Single, +36V (±18V) Digital POT w/I2C™ |
|
MCP4351
8-Bit Quad Digital POT with SPI
|
MCP4351 | 8-Bit Quad Digital POT with SPI |
|
MCP4632
7-Bit Dual Digital POT with I2C™
|
MCP4632 | 7-Bit Dual Digital POT with I2C™ |
|
MCP4442
7-Bit Quad Digital POT with NVM and I2C™
|
MCP4442 | 7-Bit Quad Digital POT with NVM and I2C™ |
|
MCP4251
8-Bit Dual Digital POT with SPI
|
MCP4251 | 8-Bit Dual Digital POT with SPI |
|
MCP4542
7-Bit Single Digital POT with NVM and I2C™
|
MCP4542 | 7-Bit Single Digital POT with NVM and I2C™ |
|
MCP4462
8-Bit Quad Digital POT with NVM and I2C™
|
MCP4462 | 8-Bit Quad Digital POT with NVM and I2C™ |
|
MCP4361
7-Bit Quad Digital POT with NVM and SPI
|
MCP4361 | 7-Bit Quad Digital POT with NVM and SPI |
|
MCP4241
7-Bit Dual Digital POT with NVM and SPI
|
MCP4241 | 7-Bit Dual Digital POT with NVM and SPI |
|
MCP4023
Low-Cost NVM Digital POT with WiperLock™
|
MCP4023 | Low-Cost NVM Digital POT with WiperLock™ |
|
MCP4631
7-Bit Dual Digital POT with I2C™
|
MCP4631 | 7-Bit Dual Digital POT with I2C™ |
|
MCP42010
8-Bit Dual Digital POT with SPI
|
MCP42010 | 8-Bit Dual Digital POT with SPI |
|
MCP4332
7-Bit Quad Digital POT with SPI
|
MCP4332 | 7-Bit Quad Digital POT with SPI |
|
MCP4541
7-Bit Single Digital POT with NVM and I2C™
|
MCP4541 | 7-Bit Single Digital POT with NVM and I2C™ |
|
MCP4461
8-Bit Quad Digital POT with NVM and I2C™
|
MCP4461 | 8-Bit Quad Digital POT with NVM and I2C™ |
|
MCP4242
7-Bit Dual Digital POT with NVM and SPI
|
MCP4242 | 7-Bit Dual Digital POT with NVM and SPI |
|
MCP4532
7-Bit Single Digital POT with I2C™
|
MCP4532 | 7-Bit Single Digital POT with I2C™ |
|
MCP4642
7-Bit Dual Digital POT with NVM and I2C™
|
MCP4642 | 7-Bit Dual Digital POT with NVM and I2C™ |
|
MCP4531
7-Bit Single Digital POT with I2C™
|
MCP4531 | 7-Bit Single Digital POT with I2C™ |
|
MCP41HV51
8-Bit Single, +36V (±18V) Digital POT w/SPI
|
MCP41HV51 | 8-Bit Single, +36V (±18V) Digital POT w/SPI |
|
MCP4431
7-Bit Quad Digital POT with I2C™
|
MCP4431 | 7-Bit Quad Digital POT with I2C™ |
|
MCP4552
8-Bit Single Digital POT with I2C™
|
MCP4552 | 8-Bit Single Digital POT with I2C™ |
|
MCP4641
7-Bit Dual Digital POT with NVM and I2C™
|
MCP4641 | 7-Bit Dual Digital POT with NVM and I2C™ |
|
MCP4013
Low-Cost 64-Step Volatile Digital POT
|
MCP4013 | Low-Cost 64-Step Volatile Digital POT |
|
MCP4341
7-Bit Quad Digital POT with NVM and SPI
|
MCP4341 | 7-Bit Quad Digital POT with NVM and SPI |
|
MCP4342
7-Bit Quad Digital POT with NVM and SPI
|
MCP4342 | 7-Bit Quad Digital POT with NVM and SPI |
|
MCP41HV31
7-Bit Single, +36V (±18V) Digital POT w/SPI
|
MCP41HV31 | 7-Bit Single, +36V (±18V) Digital POT w/SPI |
|
MCP4561
8-Bit Single Digital POT with NVM and I2C™
|
MCP4561 | 8-Bit Single Digital POT with NVM and I2C™ |
|
MCP4011
Low-Cost 64-Step Volatile Digital POT
|
MCP4011 | Low-Cost 64-Step Volatile Digital POT |
|
MCP4161
8-Bit Single Digital POT with NVM and SPI
|
MCP4161 | 8-Bit Single Digital POT with NVM and SPI |
|
MCP4141
7-Bit Single Digital POT with NVM and SPI
|
MCP4141 | 7-Bit Single Digital POT with NVM and SPI |
|
MCP4362
7-Bit Quad Digital POT with NVM and SPI
|
MCP4362 | 7-Bit Quad Digital POT with NVM and SPI |
|
MCP4262
8-Bit Dual Digital POT with NVM and SPI
|
MCP4262 | 8-Bit Dual Digital POT with NVM and SPI |
|
MCP4652
8-Bit Dual Digital POT with I2C™
|
MCP4652 | 8-Bit Dual Digital POT with I2C™ |
|
MCP4014
Low-Cost 64-Step Volatile Digital POT
|
MCP4014 | Low-Cost 64-Step Volatile Digital POT |
|
MCP4662
8-Bit Dual Digital POT with NVM and I2C™
|
MCP4662 | 8-Bit Dual Digital POT with NVM and I2C™ |
|
MCP4012
Low-Cost 64-Step Volatile Digital POT
|
MCP4012 | Low-Cost 64-Step Volatile Digital POT |
|
MCP4551
8-Bit Single Digital POT with I2C™
|
MCP4551 | 8-Bit Single Digital POT with I2C™ |
|
MCP4562
8-Bit Single Digital POT with NVM and I2C™
|
MCP4562 | 8-Bit Single Digital POT with NVM and I2C™ |
|
MCP42100
8-Bit Dual Digital POT with SPI
|
MCP42100 | 8-Bit Dual Digital POT with SPI |
|
MCP4162
8-Bit Single Digital POT with NVM and SPI
|
MCP4162 | 8-Bit Single Digital POT with NVM and SPI |
|
MCP4432
7-Bit Quad Digital POT with I2C™
|
MCP4432 | 7-Bit Quad Digital POT with I2C™ |
|
MCP45HV51
8-Bit Single, +36V (±18V) Digital POT w/I2C™
|
MCP45HV51 | 8-Bit Single, +36V (±18V) Digital POT w/I2C™ |
|
MCP4651
8-Bit Dual Digital POT with I2C™
|
MCP4651 | 8-Bit Dual Digital POT with I2C™ |
|
MCP4252
8-Bit Dual Digital POT with SPI
|
MCP4252 | 8-Bit Dual Digital POT with SPI |
|
MCP42050
8-Bit Dual Digital POT with SPI
|
MCP42050 | 8-Bit Dual Digital POT with SPI |
|
MCP4232
7-Bit Dual Digital POT with SPI
|
MCP4232 | 7-Bit Dual Digital POT with SPI |
|
MCP4451
8-Bit Quad Digital POT with I2C™
|
MCP4451 | 8-Bit Quad Digital POT with I2C™ |
|
MCP4021
Low-Cost NVM Digital POT with WiperLock™
|
MCP4021 | Low-Cost NVM Digital POT with WiperLock™ |
|
MCP4142
7-Bit Single Digital POT with NVM and SPI
|
MCP4142 | 7-Bit Single Digital POT with NVM and SPI |
|
MCP4152
8-Bit Single Digital POT with SPI
|
MCP4152 | 8-Bit Single Digital POT with SPI |
|
MCP4151
8-Bit Single Digital POT with SPI
|
MCP4151 | 8-Bit Single Digital POT with SPI |
|
MCP4131
7-Bit Single Digital POT with SPI
|
MCP4131 | 7-Bit Single Digital POT with SPI |
|
MCP4231
7-Bit Dual Digital POT with SPI
|
MCP4231 | 7-Bit Dual Digital POT with SPI |
|
MCP4331
7-Bit Quad Digital POT w/SPI
|
MCP4331 | 7-Bit Quad Digital POT w/SPI |
|
MCP4352
7-Bit Quad Digital POT with SPI
|
MCP4352 | 7-Bit Quad Digital POT with SPI |
|
MCP4024
Low-Cost NVM Digital POT with WiperLock™
|
MCP4024 | Low-Cost NVM Digital POT with WiperLock™ |
|
MCP4022
Low-Cost NVM Digital POT with WiperLock™
|
MCP4022 | Low-Cost NVM Digital POT with WiperLock™ |
|
MCP41050
8-Bit Single Digital POT with SPI
|
MCP41050 | 8-Bit Single Digital POT with SPI |
|
MCP4441
7-Bit Quad Digital POT with NVM and I2C™
|
MCP4441 | 7-Bit Quad Digital POT with NVM and I2C™ |
|
MCP41010
8-Bit Single Digital POT with SPI
|
MCP41010 | 8-Bit Single Digital POT with SPI |
|
MCP4132
7-Bit Single Digital POT with SPI
|
MCP4132 | 7-Bit Single Digital POT with SPI |
|
MCP609
2.5V to 6.0V Micropower CMOS Op Amp
|
MCP609 | 2.5V to 6.0V Micropower CMOS Op Amp |
|
MCP6231U
20 µA, 300 kHz Rail-to-Rail Op Amp
|
MCP6231U | 20 µA, 300 kHz Rail-to-Rail Op Amp |
|
MCP6054
30 µA, High Precision Op Amps
|
MCP6054 | 30 µA, High Precision Op Amps |
|
MCP6284
450 µA, 5 MHz Rail-to-Rail Op Amp
|
MCP6284 | 450 µA, 5 MHz Rail-to-Rail Op Amp |
|
MCP6244
50 µA, 550 kHz Rail-to-Rail Op Amp
|
MCP6244 | 50 µA, 550 kHz Rail-to-Rail Op Amp |
|
TC7650
Chopper Stabilized Operational Amplifier
|
TC7650 | Chopper Stabilized Operational Amplifier |
| TC1030 | TC1030 | |
| TC1035 | TC1035 | |
|
MCP6024
Rail-to-Rail Input/Output, 10 MHz Op Amps
|
MCP6024 | Rail-to-Rail Input/Output, 10 MHz Op Amps |
|
MCP604
2.7V to 6.0V Single Supply CMOS Op Amps
|
MCP604 | 2.7V to 6.0V Single Supply CMOS Op Amps |
|
MCP6234
20 µA, 300 kHz Rail-to-Rail Op Amp
|
MCP6234 | 20 µA, 300 kHz Rail-to-Rail Op Amp |
|
MCP6271R
170 µA, 2 MHz Rail-to-Rail Op Amp
|
MCP6271R | 170 µA, 2 MHz Rail-to-Rail Op Amp |
| TC1029 | TC1029 | |
| TC1026 | TC1026 | |
|
MCP6064
60 µA, High Precision Op Amps
|
MCP6064 | 60 µA, High Precision Op Amps |
| TC911A | TC911A | |
|
MCP6291R
1.0 mA, 10 MHz Rail-to-Rail Op Amp
|
MCP6291R | 1.0 mA, 10 MHz Rail-to-Rail Op Amp |
|
MCP6281R
450 µA, 5 MHz Rail-to-Rail Op Amp
|
MCP6281R | 450 µA, 5 MHz Rail-to-Rail Op Amp |
|
MCP6231R
20 µA, 300 kHz Rail-to-Rail Op Amp
|
MCP6231R | 20 µA, 300 kHz Rail-to-Rail Op Amp |
| TC1034 | TC1034 | |
|
MCP6044
600 nA, Rail-to-Rail Input/Output Op Amps
|
MCP6044 | 600 nA, Rail-to-Rail Input/Output Op Amps |
|
MCP6074
110 µA, High Precision Op Amps
|
MCP6074 | 110 µA, High Precision Op Amps |
|
MCP6034
0.9 µA, High-Precision Op Amps
|
MCP6034 | 0.9 µA, High-Precision Op Amps |
|
MCP6241R
50 µA, 550 kHz Rail-to-Rail Op Amp
|
MCP6241R | 50 µA, 550 kHz Rail-to-Rail Op Amp |
|
MCP619
2.3V to 5.5V Micropower Bi-CMOS Op Amps
|
MCP619 | 2.3V to 5.5V Micropower Bi-CMOS Op Amps |
|
MCP6022
Rail-to-Rail Input/Output, 10 MHz Op Amps
|
MCP6022 | Rail-to-Rail Input/Output, 10 MHz Op Amps |
|
MCP602
2.7V to 6.0V Single Supply CMOS Op Amps
|
MCP602 | 2.7V to 6.0V Single Supply CMOS Op Amps |
|
MCP601
2.7V to 6.0V Single Supply CMOS Op Amps
|
MCP601 | 2.7V to 6.0V Single Supply CMOS Op Amps |
|
MCP6V02
300 µA, Auto-Zeroed Op Amps
|
MCP6V02 | 300 µA, Auto-Zeroed Op Amps |
|
MCP6042
600 nA, Rail-to-Rail Input/Output Op Amps
|
MCP6042 | 600 nA, Rail-to-Rail Input/Output Op Amps |
|
MCP6043
600 nA, Rail-to-Rail Input/Output Op Amps
|
MCP6043 | 600 nA, Rail-to-Rail Input/Output Op Amps |
|
MCP617
2.3V to 5.5V Micropower Bi-CMOS Op Amps
|
MCP617 | 2.3V to 5.5V Micropower Bi-CMOS Op Amps |
|
MCP6242
50 µA, 550 kHz Rail-to-Rail Op Amp
|
MCP6242 | 50 µA, 550 kHz Rail-to-Rail Op Amp |
|
MCP6231
20 µA, 300 kHz Rail-to-Rail Op Amp
|
MCP6231 | 20 µA, 300 kHz Rail-to-Rail Op Amp |
|
MCP6052
30 µA, High Precision Op Amps
|
MCP6052 | 30 µA, High Precision Op Amps |
|
MCP6441
450 nA, 9 kHz Op Amp
|
MCP6441 | 450 nA, 9 kHz Op Amp |
|
MCP6031
0.9 µA, High-Precision Op Amps
|
MCP6031 | 0.9 µA, High-Precision Op Amps |
|
MCP603
2.7V to 6.0V Single Supply CMOS Op Amps
|
MCP603 | 2.7V to 6.0V Single Supply CMOS Op Amps |
|
MCP6271
170 µA, 2 MHz Rail-to-Rail Op Amp
|
MCP6271 | 170 µA, 2 MHz Rail-to-Rail Op Amp |
|
MCP6272
170 µA, 2 MHz Rail-to-Rail Op Amp
|
MCP6272 | 170 µA, 2 MHz Rail-to-Rail Op Amp |
|
MCP6001
1 MHz, Low-Power Op Amp
|
MCP6001 | 1 MHz, Low-Power Op Amp |
|
MCP607
2.5V to 6.0V Micropower CMOS Op Amp
|
MCP607 | 2.5V to 6.0V Micropower CMOS Op Amp |
|
MCP6004
1 MHz, Low-Power Op Amp
|
MCP6004 | 1 MHz, Low-Power Op Amp |
|
MCP6142
600 nA, Non-Unity Gain Rail-to-Rail Input/Out
|
MCP6142 | 600 nA, Non-Unity Gain Rail-to-Rail Input/Out |
|
MCP6143
600 nA, Non-Unity Gain Rail-to-Rail Input/Out
|
MCP6143 | 600 nA, Non-Unity Gain Rail-to-Rail Input/Out |
|
MCP6283
450 µA, 5 MHz Rail-to-Rail Op Amp
|
MCP6283 | 450 µA, 5 MHz Rail-to-Rail Op Amp |
|
MCP6274
170 µA, 2 MHz Rail-to-Rail Op Amp
|
MCP6274 | 170 µA, 2 MHz Rail-to-Rail Op Amp |
|
MCP6241
50 µA, 550 kHz Rail-to-Rail Op Amp
|
MCP6241 | 50 µA, 550 kHz Rail-to-Rail Op Amp |
|
MCP6051
30 µA, High Precision Op Amps
|
MCP6051 | 30 µA, High Precision Op Amps |
|
MCP6032
0.9 µA, High-Precision Op Amps
|
MCP6032 | 0.9 µA, High-Precision Op Amps |
|
MCP6062
60 µA, High Precision Op Amps
|
MCP6062 | 60 µA, High Precision Op Amps |
|
TC7652
400 kHz, Single Zero-Drift Op Amp
|
TC7652 | 400 kHz, Single Zero-Drift Op Amp |
|
MCP6241U
50 µA, 550 kHz Rail-to-Rail Op Amp
|
MCP6241U | 50 µA, 550 kHz Rail-to-Rail Op Amp |
|
MCP6294
1.0 mA, 10 MHz Rail-to-Rail Op Amp
|
MCP6294 | 1.0 mA, 10 MHz Rail-to-Rail Op Amp |
| TC1043 | TC1043 | |
|
MCP6021
Rail-to-Rail Input/Output, 10 MHz Op Amps
|
MCP6021 | Rail-to-Rail Input/Output, 10 MHz Op Amps |
|
MCP6002
1 MHz, Low-Power Op Amp
|
MCP6002 | 1 MHz, Low-Power Op Amp |
|
MCP6V01
300 µA, Auto-Zeroed Op Amps
|
MCP6V01 | 300 µA, Auto-Zeroed Op Amps |
|
MCP6V06
300 µA, Auto-Zeroed Op Amps
|
MCP6V06 | 300 µA, Auto-Zeroed Op Amps |
|
MCP6V07
300 µA, Auto-Zeroed Op Amps
|
MCP6V07 | 300 µA, Auto-Zeroed Op Amps |
|
MCP6V03
300 µA, Auto-Zeroed Op Amps
|
MCP6V03 | 300 µA, Auto-Zeroed Op Amps |
|
MCP6V08
300 µA, Auto-Zeroed Op Amps
|
MCP6V08 | 300 µA, Auto-Zeroed Op Amps |
|
MCP608
2.5V to 6.0V Micropower CMOS Op Amp
|
MCP608 | 2.5V to 6.0V Micropower CMOS Op Amp |
|
MCP618
2.3V to 5.5V Micropower Bi-CMOS Op Amps
|
MCP618 | 2.3V to 5.5V Micropower Bi-CMOS Op Amps |
|
MCP6273
170 µA, 2 MHz Rail-to-Rail Op Amp
|
MCP6273 | 170 µA, 2 MHz Rail-to-Rail Op Amp |
|
MCP6232
20 µA, 300 kHz Rail-to-Rail Op Amp
|
MCP6232 | 20 µA, 300 kHz Rail-to-Rail Op Amp |
|
MCP6072
110 µA, High Precision Op Amps
|
MCP6072 | 110 µA, High Precision Op Amps |
|
MCP6144
600 nA, Non-Unity Gain Rail-to-Rail Input/Out
|
MCP6144 | 600 nA, Non-Unity Gain Rail-to-Rail Input/Out |
|
MCP6023
Rail-to-Rail Input/Output, 10 MHz Op Amps
|
MCP6023 | Rail-to-Rail Input/Output, 10 MHz Op Amps |
|
MCP6041
600 nA, Rail-to-Rail Input/Output Op Amps
|
MCP6041 | 600 nA, Rail-to-Rail Input/Output Op Amps |
|
MCP6281
450 µA, 5 MHz Rail-to-Rail Op Amp
|
MCP6281 | 450 µA, 5 MHz Rail-to-Rail Op Amp |
|
MCP6141
600 nA, Non-Unity Gain Rail-to-Rail Input/Out
|
MCP6141 | 600 nA, Non-Unity Gain Rail-to-Rail Input/Out |
|
MCP606
2.5V to 6.0V Micropower CMOS Op Amp
|
MCP606 | 2.5V to 6.0V Micropower CMOS Op Amp |
|
MCP6291
1.0 mA, 10 MHz Rail-to-Rail Op Amp
|
MCP6291 | 1.0 mA, 10 MHz Rail-to-Rail Op Amp |
|
MCP6293
1.0 mA, 10 MHz Rail-to-Rail Op Amp
|
MCP6293 | 1.0 mA, 10 MHz Rail-to-Rail Op Amp |
|
MCP6282
450 µA, 5 MHz Rail-to-Rail Op Amp
|
MCP6282 | 450 µA, 5 MHz Rail-to-Rail Op Amp |
|
MCP616
2.3V to 5.5V Micropower Bi-CMOS Op Amps
|
MCP616 | 2.3V to 5.5V Micropower Bi-CMOS Op Amps |
|
MCP6292
1.0 mA, 10 MHz Rail-to-Rail Op Amp
|
MCP6292 | 1.0 mA, 10 MHz Rail-to-Rail Op Amp |
|
MCP6285
450 µA, 5 MHz Rail-to-Rail Op Amp
|
MCP6285 | 450 µA, 5 MHz Rail-to-Rail Op Amp |
|
MCP6295
1.0 mA, 10 MHz Rail-to-Rail Op Amp
|
MCP6295 | 1.0 mA, 10 MHz Rail-to-Rail Op Amp |
|
MCP6275
170 µA, 2 MHz Rail-to-Rail Op Amp
|
MCP6275 | 170 µA, 2 MHz Rail-to-Rail Op Amp |
|
MCP6071
110 µA, High Precision Op Amps
|
MCP6071 | 110 µA, High Precision Op Amps |
|
MCP6033
0.9 µA, High-Precision Op Amps
|
MCP6033 | 0.9 µA, High-Precision Op Amps |
|
MCP6061
60 µA, High Precision Op Amps
|
MCP6061 | 60 µA, High Precision Op Amps |
|
MCP42U83
10-bit Dual Digital POT, SPI/I2C
|
MCP42U83 | 10-bit Dual Digital POT, SPI/I2C |