5th-Order, Lowpass, Switched-Capacitor Filters

The MAX7409/MAX7410/MAX7413/MAX7414 5th-order, lowpass, switched-capacitor filters (SCFs) 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 output level.

The MAX7409/MAX7413 Bessel filters provide low overshoot 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.

Applications

* ADC Anti-Aliasing * Air-Bag Electronics * CT2 Base Stations * DAC Post-Filtering * Speech Processing

* 5th-Order Lowpass Filters

* Bessel Response (MAX7409/MAX7413)

* Butterworth Response (MAX7410/MAX7414)

* Clock-Tunable Corner Frequency (1Hz to 15kHz)

* Single-Supply Operation

* +5V (MAX7409/MAX7410)

* +3V (MAX7413/MAX7414)

* Low Power

* 1.2mA (operating mode)

* 0.2µA (shutdown mode)

* Available in 8-Pin µMAX®/DIP Packages

* Low Output Offset: ±4mV

* Single 5th-order, Bessel and Butterworth switched-capacitor filters. 15kHz maximum F (c)