The MAX7409/MAX7410/MAX7413/MAX7414 5th-order, lowpass, switched-capacitor filters operate from a single +5V (MAX7409/MAX7410) or +3V (MAX7413/ MAX7414) supply. These devices draw only 1.2mA of supply current and allow corner frequencies from 1Hz to 15kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They feature a shutdown mode, which reduces the supply current to 0.2µA. Two clocking options are available on these devices: self-clocking (through the use of an external capacitor) or external clocking for tighter corner-frequency control. An offset adjust pin allows for adjustment of the DC out- put level. The MAX7409/MAX7413 Bessel filters provide low over- shoot and fast settling, while the MAX7410/MAX7414 Butterworth filters provide a maximally flat passband response. Their fixed response simplifies the design task to selecting a clock frequency.
The MAX7409, MAX7410, MAX7413 and MAX7414 are 5th‑order low‑pass switched‑capacitor filters that operate from a single +5 V (MAX7409/MAX7410) or +3 V (MAX7413/MAX7414) supply. They draw only 1.2 mA in normal mode and as little as 0.2 µA in shutdown, making them suitable for low‑power post‑DAC filtering and anti‑aliasing applications. Two clocking options are provided: self‑clocking with an external capacitor or an external clock for tighter corner‑frequency control, and an offset‑adjust pin for DC output level tuning.
The devices offer Bessel (MAX7409/MAX7413) or Butterworth (MAX7410/MAX7414) responses, a 100:1 clock‑to‑corner frequency ratio, and corner frequencies from 1 Hz to 15 kHz. Detailed electrical characteristics, typical operating curves, pin descriptions, and package dimensions are provided for design reference.
| Supply Voltage (Vpp) | +5 V (MAX7409/MAX7410), +3 V (MAX7413/MAX7414) |
|---|---|
| Supply Current (operating mode) | 1.2 mA |
| Shutdown Current | 0.2 µA |
| Corner Frequency Range | 0.001 kHz to 15 kHz |
| Clock‑to‑Corner Ratio | 100:1 |
| Output Voltage Range | ±0.25 Vpp |
| Output Offset Voltage | ±4 mV |
| Power‑Supply Rejection Ratio (PSRR) | 70 dB |
| Input Resistance at COM | 110 kΩ to 180 kΩ |
The MAX7409 operates from a single +5 V supply.
In shutdown mode the MAX7410 draws 0.2 µA.
The MAX7414 provides a Butterworth low‑pass response with a maximally flat passband.