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ADuC841BS62-3 Folha de dados(PDF) 12 Page - Analog Devices |
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ADuC841BS62-3 Folha de dados(HTML) 12 Page - Analog Devices |
12 / 88 page ADuC841/ADuC842/ADuC843 Rev. 0 | Page 12 of 88 TYPICAL PERFORMANCE CHARACTERISTICS The typical performance plots presented in this section illustrate typical performance of the ADuC841/ADuC842/ ADuC843 under various operating conditions. Figure 5 and Figure 6 show typical ADC integral nonlinearity (INL) errors from ADC Code 0 to Code 4095 at 5 V and 3 V supplies, respectively. The ADC is using its internal reference (2.5 V) and is operating at a sampling rate of 152 kHz; the typical worst-case errors in both plots are just less than 0.3 LSB. Figure 7 and Figure 8 also show ADC INL at a higher sampling rate of 400 kHz. Figure 9 and Figure 10 show the variation in worst-case positive (WCP) INL and worst-case negative (WCN) INL versus external reference input voltage. Figure 11 and Figure 12 show typical ADC differential nonlinearity (DNL) errors from ADC Code 0 to Code 4095 at 5 V and 3 V supplies, respectively. The ADC is using its internal reference (2.5 V) and is operating at a sampling rate of 152 kHz; the typical worst-case errors in both plots are just less than 0.2 LSB. Figure 13 and Figure 14 show the variation in worst- case positive (WCP) DNL and worst-case negative (WCN) DNL versus external reference input voltage. Figure 15 shows a histogram plot of 10,000 ADC conversion results on a dc input with VDD = 5 V. The plot illustrates an excellent code distribution pointing to the low noise performance of the on-chip precision ADC. Figure 16 shows a histogram plot of 10,000 ADC conversion results on a dc input for VDD = 3 V. The plot again illustrates a very tight code distribution of 1 LSB with the majority of codes appearing in one output pin. Figure 17 and Figure 18 show typical FFT plots for the parts. These plots were generated using an external clock input. The ADC is using its internal reference (2.5 V), sampling a full-scale, 10 kHz sine wave test tone input at a sampling rate of 149.79 kHz. The resulting FFTs shown at 5 V and 3 V supplies illustrate an excellent 100 dB noise floor, 71 dB signal-to-noise ratio (SNR), and THD greater than –80 dB. Figure 19 and Figure 20 show typical dynamic performance versus external reference voltages. Again, excellent ac perform- ance can be observed in both plots with some roll-off being observed as VREF falls below 1 V. Figure 21 shows typical dynamic performance versus sampling frequency. SNR levels of 71 dB are obtained across the sampling range of the parts. Figure 22 shows the voltage output of the on-chip temperature sensor versus temperature. Although the initial voltage output at 25°C can vary from part to part, the resulting slope of −1. 4 mV/°C is constant across all parts. ADC CODES –1.0 0 511 1023 2047 2559 3071 –0.8 1535 3583 –0.6 –0.4 –0.2 0 0.2 0.4 0.6 0.8 1.0 AVDD / DVDD = 5V fS = 152kHz 4095 Figure 5. Typical INL Error, VDD = 5 V, fs = 152 kHz ADC CODES 1.0 511 1023 1535 2047 2559 0.6 0.2 –0.2 –0.6 –1.0 0.8 0.4 0 –0.4 –0.8 3071 3583 0 4095 AVDD /DVDD = 3V f S = 152kHz Figure 6. Typical INL Error, VDD = 3 V, fs = 152 kHz |
Nº de peça semelhante - ADuC841BS62-3 |
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Descrição semelhante - ADuC841BS62-3 |
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