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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST10F296 데이터시트(PDF) 304 Page - STMicroelectronics |
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ST10F296 데이터시트(HTML) 304 Page - STMicroelectronics |
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304 / 346 page  Obsolete Product(s) - Obsolete Product(s) Electrical characteristics ST10F296E 304/346 Note: The total conversion time is compatible with the formula valid for the ST10F280, while the meaning of the bit fields ADCTC and ADSTC is no longer compatible: The minimum conversion time is 388 TCL, which at 40 MHz CPU frequency corresponds to 4.85µsµ (see ST10F280). 24.7.2 ADC conversion accuracy The ADC compares the analog voltage sampled on the selected analog input channel to its analog reference voltage (VAREF) and converts it into 10-bit digital data item. The absolute accuracy of the AD conversion is the deviation between the input analog value and the output digital value. ADC conversion accuracy includes the following errors: – Offset error (OFS) – Gain error (GE) – Quantization error – Nonlinearity error (differential and integral) These errors are explained below using Figure 98. Offset error Offset error is the deviation between actual and ideal AD conversion characteristics when the digital output value changes from the minimum zero voltage, 00, to 01 (see OFS in Figure 98). Gain error Gain error is the deviation between the actual and ideal AD conversion characteristics when the digital output value changes from 3FE to 3FF, after subtracting offset error. Gain error combined with offset error represents full-scale error (see OFS + GE in Figure 98). Quantization error Quantization error is the intrinsic error of the ADC and is expressed as 1/2 LSB. Table 167. ADC programming ADCTC ADSTC Sample Comparison Extra Total conversion 00 00 TCL * 120 TCL * 240 TCL * 28 TCL * 388 00 01 TCL * 140 TCL * 280 TCL * 16 TCL * 436 00 10 TCL * 200 TCL * 280 TCL * 52 TCL * 532 00 11 TCL * 400 TCL * 280 TCL * 44 TCL * 724 11 00 TCL * 240 TCL * 480 TCL * 52 TCL * 772 11 01 TCL * 280 TCL * 560 TCL * 28 TCL * 868 11 10 TCL * 400 TCL * 560 TCL * 100 TCL * 1060 11 11 TCL * 800 TCL * 560 TCL * 52 TCL * 1444 10 00 TCL * 480 TCL * 960 TCL * 100 TCL * 1540 10 01 TCL * 560 TCL * 1120 TCL * 52 TCL * 1732 10 10 TCL * 800 TCL * 1120 TCL * 196 TCL * 2116 10 11 TCL * 1600 TCL * 1120 TCL * 164 TCL * 2884 Obsolete Product(s) - Obsolete Product(s) |
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