Create a design and simulate using EE-Sim tools: MAX7426EPA
The MAX7426/MAX7427 5th-order, lowpass, elliptic, switched-capacitor filters (SCFs) operate from a single +5V (MAX7426) or +3V (MAX7427) supply. The devices draw only 0.8mA of supply current and allow corner frequencies from 1Hz to 12kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They can be put into a low-power mode, reducing supply current to 0.2μA. Two clocking options are available: self-clocking (through the use of an external capacitor) or external clocking for tighter cutoff-frequency control. An offset-adjust pin allows for adjustment of the DC output level. The MAX7426/MAX7427 deliver 37dB of stopband rejection and a sharp rolloff with a transition ratio of 1.25. Their fixed response limits the design task to selecting a clock frequency.
characterization
- 5th-Order, Elliptic Lowpass Filters
- Low Noise and Distortion: -80dB THD + Noise
- Clock-Tunable Corner Frequency (1Hz to 12kHz)
- Single-Supply Operation
- +5V (MAX7426)
- +3V (MAX7427)
- Low Power
- 0.8mA (Operating Mode)
- 0.2μA (Shutdown Mode)
- Available in 8-Pin μMAX?/PDIP Packages
- Low Output Offset: ±4mV
Application Areas
- ADC Anti-Aliasing Filter
- Post-DAC Filtering Speech Processing
(Product Image: Diagram)
Technical Parameters
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Number of Channels
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1
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Cutoff Frequency
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9 kHz
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Supply Voltage Max
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5.5 V
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Supply Voltage Min
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4.5 V
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Maximum Operating Temperature
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+ 85 C
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Mounting Style
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Through Hole
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Package / Case
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PDIP N-8
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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
MAX7426EPA Datasheet
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MAX7426 data sheet for guidance
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