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MAX7400ESA Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX7400ESA Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 12 page 8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters _______________________________________________________________________________________ 5 Note 1: The maximum fC is defined as the clock frequency, fCLK = 100 · fC, at which the peak SINAD drops to 68dB with a sinusoidal input at 0.2fC. Note 2: DC insertion gain is defined as ∆VOUT / ∆VIN. Note 3: OS voltages above VDD - 1V saturate the input and result in a 75µA typical input leakage current. Note 4: For MAX7400/MAX7403, fOSC (kHz) ≅ 38 · 103 / COSC (pF). For MAX7404/MAX7407, fOSC (kHz) ≅ 34 · 103 / COSC (pF). Note 5: The input frequencies, fIN, are selected at the peaks and troughs of the frequency responses. ELLIPTIC (r = 1.2) FILTER CHARACTERISTICS—MAX7403/MAX7407 (VDD = +5V for MAX7403, VDD = +3V for MAX7407; filter output measured at OUT; 10kΩ || 50pF load to GND at OUT; SHDN = VDD; VCOM = VOS = VDD / 2; fCLK = 100kHz; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25°C.) Typical Operating Characteristics (VDD = +5V for MAX7400/MAX7403, VDD = +3V for MAX7404/MAX7407; VCOM = VOS = VDD / 2; SHDN = VDD; fCLK = 100kHz; TA = +25°C; unless otherwise noted.) -120 -80 -100 -40 -60 0 -20 20 012345 MAX7400/MAX7404 (r = 1.5) FREQUENCY RESPONSE INPUT FREQUENCY (kHz) fC = 1kHz -0.08 0 -0.04 0.12 0.08 0.04 0.20 0.16 0.24 0 202 404 606 808 1010 MAX7400/MAX7404 (r = 1.5) PASSBAND FREQUENCY RESPONSE INPUT FREQUENCY (Hz) fC = 1kHz -640 -480 -560 -240 -320 -400 -80 -160 0 0 300 600 900 1200 1500 MAX7400/MAX7404 (r = 1.5) PHASE RESPONSE INPUT FREQUENCY (Hz) fC = 1kHz PARAMETER MIN TYP MAX UNITS -58 -50 -60 -54 Insertion Gain Relative to DC Gain (Note 5) -60 -54 fIN = 1.533fC dB fIN = 2.875fC -59 -54 fIN = 1.200fC fIN = 1.261fC -0.20 0.10 0.20 -0.20 0.14 0.30 CONDITIONS -0.20 0.09 0.30 fIN = 0.992fC fIN = 1.000fC -0.20 0.02 0.20 fIN = 0.902fC fIN = 0.956fC -0.20 0.02 0.20 -0.20 -0.06 0.20 fIN = 0.640fC fIN = 0.784fC -0.20 -0.11 0.20 fIN = 0.408fC |
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