MAX7405

19-4788; Rev 1; 6/99 8th-Order, Lowpass, Bessel, Switched-Capacitor Filters General Description The MAX7401/MAX7405 8th-order, lowpass, Bessel, switched-capacitor filters (SCFs) operate from a single +5V (MAX7401) or +3V (MAX7405) supply. These devices draw only 2mA of supply current and allow corner frequencies from 1Hz to 5kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They feature a shutdown mode that reduces 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 MAX7401/MAX7405 Bessel filters provide low overshoot and fast settling. Their fixed response simplifies the design task to selecting a clock frequency. o 8th-Order, Lowpass Bessel Filters o Low Noise and Distortion: -82dB THD + Noise o Clock-Tunable Corner Frequency (1Hz to 5kHz) o 100:1 Clock-to-Corner Ratio o Single-Supply Operation +5V (MAX7401) +3V (MAX7405) o Low Power 2mA (Operating Mode) 0.2µA (Shutdown Mode) o Available in 8-Pin SO/DIP Packages o Low Output Offset: ±5mV Features MAX7401/MAX7405 Applications ADC Anti-Aliasing Post-DAC Filtering Air-Bag Electronics CT2 Base Stations Speech Processing PART MAX7401CSA MAX7401CPA MAX7401ESA MAX7401EPA MAX7405CSA MAX7405CPA MAX7405ESA MAX7405EPA Ordering Information TEMP. RANGE 0°C to +70°C 0°C to +70°C -40°C t...