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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9678P датащи(PDF) 162 Page - STMicroelectronics |
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L9678P датащи(HTML) 162 Page - STMicroelectronics |
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162 / 203 page  System voltage diagnostics L9678P, L9678P-S 162/203 DocID029274 Rev 3 For measurements other than voltage (current, resistance, temperature etc.) the ranges are specified in the electrical parameters section of the relevant block. 13.1 Analog to digital algorithmic converter The device hosts an integrated 10 bit Analog to Digital converter, running at a clock frequency of 16MHz. The ADC output is processed by a D to D converter with the following functions: Use of trimming bits to recover ADC offset and gain errors; Digital low-pass filtering; Conversion from 12 to 10 bits. 10 bits data are filtered inside the digital section. The number of samples that are filtered varies depending on the chosen conversion. As per Section 5.1.2: System configuration register (SYS_CFG), the number of used samples in converting DC sensor, squib or temperature measurements defaults to 8. The number of samples for all other measurements defaults to 4. The sample number can be configured by accessing the SYS_CFG register. After low pass filter, the residual total error is ±4 LSB. This error figure SFx X VRESDIAG X GPODx X GPOSx X VIN X VBATMON X WAKEUP X ISOK X VSUP X WDTDIS X RSUx X DCSx X VDDQ X VDD5 X VDD3V3 X VINT3V3 X Bandgap (BGR/BGM) X TEMP X Table 12. Diagnostics divider ratios (continued) Measurements Divider Ratio 15:1 10:1 7.125:1 7:1 4:1 1:1 |
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