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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT43USB355 датащи(PDF) 59 Page - ATMEL Corporation |
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AT43USB355 датащи(HTML) 59 Page - ATMEL Corporation |
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59 / 115 page  59 AT43USB355 2603G–USB–04/06 Analog-to-digital Converter Feature list: • 10-bit Resolution • 4 LSB Integral Non-linearity • ±2 LSB Absolute Accuracy • 12 – 768 µs Conversion Time • Up to 83 kSPS at Maximum Resolution • 12 Multiplexed Input Channels • Rail-to-rail Input Range • Free Running or Single Conversion Mode • Interrupt on ADC Conversion Complete The AT43USB355 features a 10-bit successive approximation ADC. The ADC is connected to a 12-channel Analog Multiplexer to pins AD0 – AD11. The ADC contains a Sample and Hold Amplifier that ensures that the input voltage to the ADC is held at a constant level during con- version. A block diagram of the ADC is shown in Figure 22. An external reference voltage must be applied to the V REF pin. This voltage must be in the range between 2.4V and the VCEXTA voltage. Figure 22. Analog-to-digital Converter Block Schematic ADC Conversion Complete IRQ 8-bit Data Bus ADC Multiplexer Select (ADMUX) Prescaler ADC Ctrl and Staus Register (ADCSR) ADC Data Register (ADCH/ADCL) Conversion Logic 10-bit DAC + - Sample and Hold Comparator Analog Inputs VREF 15 0 |
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