MAX292 Datasheet | Maxim Integrated

Description The MAX291/MAX292/MAX295/MAX296 are easy-to-use, 8th-order, lowpass, switched-capacitor filters that can be set up with corner frequencies from 0.1Hz to 25k Hz (MAX291/MAX292) or 0.1Hz to 50k Hz (MAX295/MAX296). The MAX291/MAX295 Butterworth filters provide maximally flat passband response, and the MAX292/MAX296 Bessel filters provide low overshoot and fast settling. All four filters have fixed responses, so the design task is limited to selecting the clock frequency that controls the filter’s corner frequency. An external capacitor is used to generate a clock using the internal oscillator, or an external clock signal can be used. An unmitted operational amplifier (noninverting input grounded) is provided for building a continuoustime lowpass filter for post-filtering or anti-aliasing. Produced in an 8-pin DIP/SO and a 16-pin wide SO package, and requiring a minimum of external ponents, the MAX291 series delivers very aggressive performance from a tiny area. Applications ADC Anti-Aliasing Filter Noise Analysis DAC Post-Filtering 50Hz/60Hz Line-Noise Filtering Functional Diagrams Typical Operating Circuit +5V INPUT 8 IN 7 V+ MAX29_ OUT 5 OP OUT 3 OUTPUT CLOCK 1 CLK V- 4 OP IN- Pin Configurations appear at end of data sheet. Functional Diagrams continue-5d V at end of data sheet. UCSPPinis Caontrfaigduermataiornk oisf 8M-paixnim DIPn/t Seg Or.ated Products, Inc. Features o 8th-Order Lowpass Filters: Butterworth (MAX291/MAX295) Bessel (MAX292/MAX296) o Clock-Tunable Corner-Frequency Range: 0.1Hz to 25k Hz (MAX291/MAX292) 0.1Hz to 50k Hz (MAX295/MAX296) o No External Resistors or Capacitors Required o Internal or External Clock o Clock to Corner Frequency Ratio: 100:1 (MAX291/MAX292) 50:1 (MAX295/MAX296) o Low Noise: -70d B THD + Noise (Typ) o Operate with a Single +5V Supply or Dual ±5V Supplies o Unmitted Op Amp for Anti-Aliasing or Clock Noise Filtering o 8-Pin DIP and SO Packages Ordering Information PART MAX291CPA MAX291CSA...