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TC7109CLW bảng dữ liệu(PDF) 22 Page - Microchip Technology |
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TC7109CLW bảng dữ liệu(HTML) 22 Page - Microchip Technology |
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22 / 30 page ![]() TC7109/A DS21456C-page 22 © 2006 Microchip Technology Inc. 5.0 INTEGRATING CONVERTER FEATURES The output of integrating ADCs represents the integral, or average, of an input voltage over a fixed period of time. Compared with techniques in which the input is sampled and held, the integrating converter averages the effects of noise. A second important characteristic is that time is used to quantize the answer, resulting in extremely small non-linearity errors and no missing output codes. The integrating converter also has very good rejection of frequencies whose periods are an integral multiple of the measurement period. This feature can be used to advantage in reducing line frequency noise (Figure ). FIGURE 5-1: Normal Mode Rejection of Dual Slope Converter as a Function of Frequency 30 20 10 0 0.1/t 1/t 10/t Input Frequency t = Measurement Period |
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