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 MAX270EWP-T has an on-board, uncommitted op amp, while the MAX271 has an internal track-and-hold (T/H).
特性
- Continuous-Time Filtering – No Clock Required
- Dual 2nd-Order Lowpass Filters
- Sections Independently Programmable: 1kHz to 25kHz
- 96dB Dynamic Range
- No External Components
- Cascadable for Higher Order
- Low-Power Shutdown Mode
- Track-and-Hold (MAX271)
应用领域
- Anti-Aliasing and Track-and-Hold (MAX271)
- Anti-Aliasing Filter
- Low-Noise Applications
- Lowpass Filtering
- Output Smoothing
(产品图片: Diagram)
技术参数
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Number of Channels
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2
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Cutoff Frequency
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25 kHz
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Supply Voltage Max
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16 V
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Supply Voltage Min
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4.75 V
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Maximum Operating Temperature
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+ 85 C
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Mounting Style
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SMD/SMT
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Package / Case
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SOIC-20 Wide
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Packaging
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Reel
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Minimum Operating Temperature
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– 40 C
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Operating Supply Voltage
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5 V, 9 V, 12 V, 15 V
MAX270EWP-T Datasheet
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MAX270 data sheet for guidance
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