This Product Selection Guide contains information to help select products in the Filters - Active category on DigiKey.com
Filters that are Active are designed to remove unwanted frequencies and signals from a circuit using passives components and amplifying components. The filter types include Antialiasing, Band Pass, Bessel, Butterworth, Cauer, Continuous Low Pass, Digital, Elliptic Band Pass, FIR, Half Band, Linear Phase, Low Pass, Ripple, SD/ED/HD, Serial I/O, Universal, and Variable with frequency ranging from 2kHz to 6.9GHz.
SelectionCharacteristics
Filter Type: Indicates the style and configuration of the device.
Frequency - Cutoff or Center: Indicates the center or range of frequencies the part is designed to filter.
Number of Filters: Indicates the number of filters inside the device.
Filter Order: The number of roots in the denominator of a filter’s transfer function. Affects the “steepness” of a filter’s transition band frequency response.
Voltage - Supply: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.
Mounting Type: Indicates how the device is attached.
Package / Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the supplier device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
Supplier Device Package: This is what the manufacturer calls the package of this device. They are manufacturer specific. It is typically best to use the actual dimensions from the datasheets rather than to go by this terminology when designing your circuit.
ProductExamples
| MFR PART # | MAX7427EUA+T |
|---|---|
| DIGIKEY PART # | MAX7427EUA+TTR-ND - Tape & Reel (TR) |
| MANUFACTURER | Analog Devices Inc./Maxim Integrated |
| DESCRIPTION | IC FILTER 12KHZ LOWPASS 8UMAX |
| DATASHEET | Click Here |
| MFR PART # | LTC1060CN#PBF |
|---|---|
| DIGIKEY PART # | 505-LTC1060CN#PBF-ND |
| MANUFACTURER | Analog Devices Inc. |
| DESCRIPTION | IC FILTER 30KHZ UNIV SWTCH 20DIP |
| DATASHEET | Click Here |
| MFR PART # | MAX280EPA+ |
|---|---|
| DIGIKEY PART # | MAX280EPA±ND |
| MANUFACTURER | Analog Devices Inc./Maxim Integrated |
| DESCRIPTION | IC FILTER 20KHZ LOWPASS 8DIP |
| DATASHEET | Click Here |
MediaLinks
Videos
Videos on Active Filters
Articles
Universal Active Filters
Filter Selection & Design: The Gateway
Active Filters Control EMI, Save PCB Space
Articles on Active Filters
Product Training Modules
Power Factor Correction - Infineon
Wireless Components - YAGEO
Blogs
SAW Filters Provide Excellent Characteristics
Blogs on Active Filters
TechForum
TechForum Posts on Active Filters