The MF10 is a dual 2nd order, switched capacitor, state variable filter. Each of the two filter sections uses two switched-capacitor integrators and an op-amp to generate a second-order function. The location of the poles (and thus the center frequency and Q) is determined by the frequency of an external clock and 2 to 4 external resistors. No external capacitors are used. Each of the two filter sections of the MF10 can generate all standard 2nd order functions: bandpass, lowpass, high pass, notch (band-reject), complex zeroes, and all-pass functions.
The frequency of the 2nd order poles is accurate to #0.2% and the Q is accurate to within 2%. Fourth-order filters can be made by cascading the two 2nd order filter sections of the MF10, and higher-order filters can easily be made by cascading more MF10s. The excellent accuracy and stability of MF10 based filters eliminate the complex, costly tuning normally required in the production of high order (multipole) filters.
MF10 Pinout
MF10 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | LPA | Low Pass Pin A |
| 2 | BPA | Band Pass Pin A |
| 3 | N/AP/HPA | Notch/All-Pass/High Pass A |
| 4 | INV A | Inverting Pin A |
| 5 | S1A | Signal Input A |
| 6 | SA/B | Switch Control Pin A/B |
| 7 | VA+ | + Analog Voltage Pin |
| 8 | VD+ | + Digital Voltage Pin |
| 9 | LSH | Level Shift Pin |
| 10 | CLK A | Clock Pin A |
| 11 | CLK B | Clock Pin B |
| 12 | 50/100/CL | Selection Pins |
| 13 | VD- | -ve Digital Voltage Supply Pin |
| 14 | VA- | -ve Analog Voltage Supply Pin |
| 15 | A GND | Analog Ground Pin |
| 16 | S1B | Signal Input B |
| 17 | INV B | Inverting Pin B |
| 18 | N/AP/HPB | Notch/All-Pass/High Pass |
| 19 | BPB | Band Pass Pin B |
| 20 | LPB | Low Pass Pin B |
MF10 Features
- No External Capacitors Required
- Low Sensitivity to External Component Variation
- Excellent Frequency and Q Stability
- Easily Cascaded for Multipole Filters
- Filter Frequency Set by External Clock Frequency
- 0.2% Clock to Center Frequency Ratio Accuracy
- Up to 3 Simultaneous Filter Function Outputs
- Up to 30kHz Operation
- Easy to use
- Design Directly from the Data Sheet Monolithic, Low Power CMOS Design
Application
- This versatile device is used for a wide range of filtering applications such as:
- Tunable active filters
- Multi-pole filters
- Anti-aliasing filters
- Adaptive Filtering
- Phase locked loops
- Signal Processing/ Conditioning
You can download this datasheet for MF10 General Purpose Dual Active Filter – Datasheet from the link given below:
