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AD7357BRUZ-RL 数据表(PDF) 11 Page - Analog Devices |
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AD7357BRUZ-RL 数据表(HTML) 11 Page - Analog Devices |
11 / 20 page AD7357 Rev. 0 | Page 11 of 20 Intermodulation Distortion (IMD) With inputs consisting of sine waves at two frequencies, fa and fb, any active device with nonlinearities creates distortion products at sum and difference frequencies of mfa ± nfb where m, n = 0, 1, 2, 3, and so on. Intermodulation distortion terms are those for which neither m nor n are equal to zero. For example, the second-order terms include (fa + fb) and (fa − fb), while the third-order terms include (2fa + fb), (2fa − fb), (fa + 2fb), and (fa − 2fb). The AD7357 is tested using the CCIF standard where two input frequencies near the top end of the input bandwidth are used. In this case, the second-order terms are usually distanced in frequency from the original sine waves, while the third-order terms are usually at a frequency close to the input frequencies. As a result, the second- and third-order terms are specified separately. The calculation of the intermodulation distortion is as per the THD specification (see Table 2), where it is the ratio of the rms sum of the individual distortion products to the rms amplitude of the sum of the fundamentals expressed in decibels (dB). Thermal Hysteresis Thermal hysteresis is defined as the absolute maximum change of the reference output voltage after the device is cycled through temperature from either T_HYS+ = 25°C to TMAX to 25°C T_HYS– = 25°C to TMIN to 25°C It is expressed in ppm using the following equation: 6 10 ) 25 ( ) _ ( ) 25 ( ) ppm ( × ° − ° = C V HYS T V C V V REF REF REF HYS where: VREF(25°C) is VREF at 25°C. VREF(T_HYS) is the maximum change of VREF at T_HYS+ or T_HYS–. |
类似零件编号 - AD7357BRUZ-RL |
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类似说明 - AD7357BRUZ-RL |
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