MAX261BCWG+T

MAX261BCWG+T Features

(cid:2) Filter Design Software Available(cid:2) Microprocessor Interface(cid:2) 64-Step Center Frequency Control(cid:2) 128-Step Q Control(cid:2) Independent Q and f0 Programming(cid:2) Guaranteed Clock to f0 Ratio-1% (A grade)(cid:2) 75kHz f0 Range (MAX262)(cid:2) Single +5V and ±5V Operation

MAX261BCWG+T General Description

The MAX260/MAX261/MAX262 CMOS dual second-order universal switched-capacitor active filters allowmicroprocessor control of precise filter functions. Noexternal components are required for a variety of band-pass, lowpass, highpass, notch, and allpass configura-tions. Each device contains two second-order filtersections that place center frequency, Q, and filter oper-ating mode under programmed control.An input clock, along with a 6-bit f0 program input,determine the filter's center or corner frequency withoutaffecting other filter parameters. The filter Q is also pro-grammed independently. Separate clock inputs foreach filter section operate with either a crystal, RC net-work, or external clock generator.The MAX260 has offset and DC specifications superiorto the MAX261 and MAX262 and a center frequency(f0) range of 7.5kHz. The MAX261 handles center fre-quencies to 57kHz, while the MAX262 extends the cen-ter frequency range to 140kHz by employing lowerclock-to-f0 ratios. All devices are available in 24-pin DIPand small outline packages in commercial, extended,and military temperature ranges.

MAX261BCWG+T Applications

µP-Tuned FiltersAnti-Aliasing FiltersDigital Signal ProcessingAdaptive FiltersSignal AnalysisPhase-Locked Loops