MAX270：Digitally-Programmed, Dual 2nd-Order Continuous Lowpass Filter
The MAX270/MAX271 are digitally-programmed, dual second-order continuous-time lowpass filters. Their typical dynamic range of 96dB surpasses most switched capacitor filters which require additional filtering to remove clock noise. The MAX270/MAX271 are ideal for anti-aliasing and DAC smoothing applications and can be cascaded for higher-order responses. The two filter sections are independently programmable by either microprocessor (µP) control or pin strapping. Cutoff frequencies in the 1kHz to 25kHz range can be selected. The MAX270 has an on-board, uncommitted op amp, while the MAX271 has an internal track-and-hold (T/H).
Key Features
| MAX270, MAX271: Typical Operating Circuit Applications/Uses
|
DataSheet
| title | Download file |
|---|---|
| MAX270-MAX271 Data Sheet | MAX270-MAX271.pdf |
Parametrics
| Part Number | Filter Sections | Order Per Filter Section | Filter Class | Filter Type | Filter Characteristic | Program Method | Lowest Cutoff (Hz) | Highest Cutoff (kHz) | VSUPPLY (Dual) (±V) | VSUPPLY (V) | Oper. Temp. (°C) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| max | min | Dual | See Notes | ||||||||||
| MAX270 | 2 | 2 | Continuous | Lowpass | Chebychev | µP Bus Pin Strap | 1000 | 25 | 5 | 5 | -55 to +125 -40 to +85 0 to +70 | CDIP(N)/20 PDIP(N)/20 SOIC(W)/20 | $11.29 @1k |
| MAX271 | CDIP(N)/24 PDIP(N)/24 SOIC(W)/24 | $11.80 @500 | |||||||||||
Related Products
- MAX274：4th- and 8th-Order, Continuous-Time Active Filters
- MAX275：4th- and 8th-Order, Continuous-Time Active Filters
Ordering Information
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| MAX270C/D | No Longer Available | MAX270EWP+ | DICE SALES,;NA pin;DICE S; | 0°C to +70°C | See data sheet |
| MAX270CPP | No Longer Available | MAX270CPP+ | PDIP(N),;20 pin;217.1 mm² | 0°C to +70°C | No |
| MAX270CPP+ | Active | PDIP(N),;20 pin;217.1 mm² | 0°C to +70°C | Lead Free | |
| MAX270CWP | No Longer Available | MAX270CWP+ | SOIC(W),;20 pin;138.5 mm² | 0°C to +70°C | No |
| MAX270CWP+ | Active | SOIC(W),;20 pin;138.5 mm² | 0°C to +70°C | Lead Free | |
| MAX270CWP+T | Active | W.SO;20 pin | 0°C to +70°C | See data sheet | |
| MAX270CWP-T | No Longer Available | MAX270CWP+T | W.SO;20 pin | 0°C to +70°C | See data sheet |
| MAX270EPP | No Longer Available | MAX270EPP+ | PDIP(N),;20 pin;217.1 mm² | -40°C to +85°C | No |
| MAX270EPP+ | Active | PDIP(N),;20 pin;217.1 mm² | -40°C to +85°C | Lead Free | |
| MAX270EWP | No Longer Available | MAX270EWP+ | SOIC(W),;20 pin;138.5 mm² | -40°C to +85°C | No |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| MAX270EWP+ | Active | SOIC(W),;20 pin;138.5 mm² | -40°C to +85°C | Lead Free | |
| MAX270EWP+T | Active | SOIC(W),;20 pin;138.5 mm² | -40°C to +85°C | Lead Free | |
| MAX270EWP-T | No Longer Available | MAX270EWP+T | SOIC(W),;20 pin;138.5 mm² | -40°C to +85°C | No |
| MAX270MJP | No Longer Available | CDIP(N),;20 pin;218.9 mm² | -55°C to +125°C | No |
- MAX270-MAX271.pdf MAX271
