DESCRIPTION

· The LMF100 is a dual high-performance switched capacitor filter.

· It consists of two independent general-purpose filter blocks.

· Each filter block can realize various second-order and first-order filtering functions with an external clock and two to four resistors.

· Each block has three outputs: one configurable for allpass, highpass, or notch functions, and the other two for bandpass and lowpass functions.

· The center frequency of each filter stage is tuned using an external clock or a combination of a clock and resistor ratio.

· Up to a fourth-order biquadratic function can be realized with one LMF100, and higher-order filters can be implemented by cascading additional packages.

· The LMF100 is pin-compatible with the industry standard MF10 but offers improved performance.

FEATURES

· Wide power supply range: 4V to 15V.

· Operation up to 100kHz.

· Low offset voltage: typically ±5mV (50:1 or 100:1 mode).

· Low crosstalk: -60dB.

· Clock to center frequency ratio accuracy: ±0.2% (typical).

· f0×Q range up to 1.8MHz.

· Fabricated on TI's high-performance analog silicon gate CMOS process (LMCMOS™).

APPLICATIONS

· Replacement of active RC filters with reduced form factors and higher accuracy and tunability.

· Alternative to integrated continuous-time filters.

· Realization of classical filters such as Butterworth, Bessel, Elliptic, and Chebyshev.