ADI LTC1560-1IS8#PBF

Непрерывный низкочастотный сигнал1 МГц15±4,5 В ~ 5,5 В

Overview

The LTC1560-1IS8 is a 5th order, continuous-time, lowpass filter. The elliptic transfer function of the LTC1560-1IS8 was carefully chosen to reach a compromise between selectivity, for antialiasing applications, and transient response. The filter cutoff frequency, fCUTOFF, is pin selectable to either 500kHz (Pin 5 to V+) or 1MHz (Pin 5 to V–). When programmed for 1MHz, the passband ripple is typically ±0.2dB up to 0.55fCUTOFF and ±0.3dB to 0.9fCUTOFF. The transition band gain is –24dB at 1.4fCUTOFF and –51dB at 2fCUTOFF. Stopband attenuation is 63dB at 2.43fCUTOFF and above, remaining at least 60dB to 10MHz with proper board layout. When the LTC1560-1IS8 is programmed for fCUTOFF = 500kHz, the filter response closely follows the 1MHz case with the exception of passband flatness near the cutoff frequency; the gain at fCUTOFF is –1.3dB.

Other cutoff frequencies from 450kHz to 1.5MHz can be obtained. Demo board DC135A is available for the LTC1560-1. For more information please contact LTC Marketing.

Features

Applications

• Sample Rate Converters
• Digital Down Conversion
• D/A and A/D pre/post Filtering
• Tuning Bandwidth Expansion for HSP45116 and HSP45106
• Quadrature, Complex Flterlng
• Image Processing
• Polyphase Flterng
• Adaptive Fllterlng
• Very Narrow Band Fllters
• Zoom Spectral Analysis