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LTC1562CG 数据表(PDF) 14 Page - Linear Integrated Systems |
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LTC1562CG 数据表(HTML) 14 Page - Linear Integrated Systems |
14 / 28 page 14 LTC1562 1562fa TYPICAL APPLICATIONS (Basic) 1 2 3 5 6 8 9 10 20 19 18 16 15 13 12 11 INV B V1 B V2 B V+ SHDN V2 A V1 A INV A INV C V1 C V2 C V– AGND V2 D V1 D INV D LTC1562 RIN2 RIN4 RIN1 VIN2 VIN1 SCHEMATIC INCLUDES PIN NUMBERS FOR 20-PIN PACKAGE. PINS 4, 7, 14, 17 (NOT SHOWN) ALSO CONNECT TO V – VOUT1 1562 TA03a VOUT2 RIN3 –5V 5V RQ1 R21 R23 0.1 µF 0.1 µF RQ3 R24 RQ4 RQ2 R22 Dual 4th Order Lowpass Filters Amplitude Response FREQUENCY (Hz) 10k 10 0 –10 –20 –30 –40 –50 –60 –70 –80 100k 1M 1562 TA03b BUTTERWORTH f –3dB = 100kHz 10k R21, R23, RIN1, RIN3 = Quick Design Formulas for Some Popular Response Types: 2 100kHz ƒ C Butterworth (Maximally Flat Passband) for fC 10kHz to 140kHz 14.24k 2 100kHz ƒ C Chebyshev (Equiripple Passband) for fC 20kHz to 120kHz 3.951k 2 100kHz ƒ C Bessel (Good Transient Response) for fC 10kHz to 70kHz 5.412k RQ1, RQ3 = 100kHz ƒ C 7.26k 100kHz ƒ C 5.066k 100kHz ƒ C 10k R22, R24, RIN2, RIN4 = 2 100kHz ƒ C 7.097k 2 100kHz ƒ C 4.966k 2 100kHz ƒ C 13.07k RQ2, RQ4 = Notes: fC is the cutoff frequency: For Butterworth and Bessel, response is 3dB down at fC. For Chebyshev filters with ±0.1dB passband ripple up to 0.95 fC, use LTC1562 “A” grade. Example: Butterworth response, fC = 50kHz. from the formulas above, R21 = R23 = RIN1 = RIN3 = 10k(100kHz/50kHz)2 = 40k. RQ1 = RQ3 = 5.412k(100kHz/50kHz) = 10.82k. R22 = R24 = RIN2 = RIN4 = 10k(100kHz/50kHz)2 = 40k. RQ2 = RQ4 = 13.07k(100kHz/50kHz) = 26.14k. Use nearest 1% values. 100kHz ƒ C 17.53k 100kHz ƒ C 3.679k 100kHz ƒ C 1562 TA03 TABLE |
类似零件编号 - LTC1562CG |
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类似说明 - LTC1562CG |
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