LTC1560-1 Datasheet | Linear Technology

LTC1560-1 1MHz/500k Hz Continuous Time, Low Noise, Lowpass Elliptic Filter Features s s s s s s s 5th Order, 1MHz Elliptic Filter in SO-8 Package Pin Selectable 1MHz/500k Hz Cutoff Frequency Signal-to-Noise Ratio (SNR): 75d B Signal-to-Noise Ratio with - 63d B THD: 69d B Passband Ripple (f CUTOFF = 1MHz): ± 0.3d B Stopband Attenuation Better Than 60d B No External ponents Required U APPLICATIONS s s s either 500k Hz (Pin 5 to V +) or 1MHz (Pin 5 to V - ). When programmed for 1MHz, the passband ripple is typically ± 0.2d B up to 0.55f CUTOFF and ± 0.3d B to 0.9f CUTOFF. The transition band gain is - 24d B at 1.4f CUTOFF and - 51d B at 2f CUTOFF. Stopband attenuation is 63d B at 2.43f CUTOFF and above, remaining at least 60d B to 10MHz with proper board layout. When the LTC1560-1 is programmed for f CUTOFF = 500k Hz, the filter response closely follows the 1MHz case with the exception of passband flatness near the cutoff frequency; the gain at f CUTOFF is - 1.3d B. The LTC1560-1, unlike other high frequency filters, is designed for low noise and low distortion. With a 1VRMS input signal, the signal-to-noise ratio is 69d B and the THD is - 63d B. The maximum SNR of 75d B is obtained with a 2.1VRMS input signal. This results in - 46d B THD. The LTC1560-1 operates with ± 5V supplies, has a power saving mode and is available in an SO-8 surface mount package. Other cutoff frequencies from 450k Hz to 1.5MHz can be obtained. Demo board DC135A is available for the LTC1560-1. For more information please contact LTC Marketing. , LTC and LT are registered trademarks of Linear Technology Corporation. Antialiasing Filters Smoothing or Reconstruction Filters munication Filters DESCRIPTION The LTC ®1560-1 is a 5th order, continuous-time, lowpass filter. The elliptic transfer function of the LTC1560-1 was carefully chosen to reach a promise between selectivity, for antialiasing applications, and transient response. The filter cutoff frequency, f CUTOFF, is pin selectable to TYPICAL APPLICATION Freq...