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SLG46534 Folha de dados(PDF) 92 Page - Dialog Semiconductor |
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SLG46534 Folha de dados(HTML) 92 Page - Dialog Semiconductor |
92 / 172 page SLG46534_DS_107 Page 91 of 171 SLG46534 Each cell also has a hysteresis selection, to offer hysteresis of 0 mV, 25 mV, 50 mV or 200 mV. The 50 mV and 200 mV hysteresis options can be used with internal voltage reference only, while 25 mV hysteresis option can be used with both internal and external voltage reference. The 50 mV and 200 mV hysteresis options are one way hysteresis. It means that the actual thresholds will be Vref (high threshold) and Vref - hysteresis (low threshold). The ACMP output will retain its previous value, if the input voltage is within threshold window (between Vref and Vref - hysteresis). Please note: for the 25 mV hysteresis option threshold levels will be Vref + hysteresis/2 (high threshold) and Vref – hysteresis/2 (low threshold). Note: Any ACMP powered on enables the BandGap internal circuit as well. An analog voltage will appear on Vref even when the Force BandGap option is set as Disabled. For high input impedance when using the gain divider (x0.25, x0.33, x0.5), it is possible to use the input buffer. However, this will add some offset, see Figure 53. It is not recommended to use ACMP buffer when VDD < 2.5 V. Table 73. Gain Divider Input Resistance Gain x1 x0.5 x0.33 x0.25 Input Resistance 100 MΩ 1 MΩ 0.75 MΩ 1 MΩ Table 74. Gain Divider Accuracy Gain x0.5 x0.33 x0.25 Accuracy ±0.51% ±0.34% ±0.25% Figure 53. Typical Buffer Input Voltage Offset vs. Voltage Reference at T = (-40.... +85)°C, Buffer Bandwidth = 1 kHz, Vhys = 0 mV, Gain = 1. -40 -30 -20 -10 0 10 20 30 40 50 250 600 850 1200 VOLTAGE REFERENCE (mV) Upper Limit @ VDD≥2.7V Lower Limit @ VDD≥2.7V |
Nº de peça semelhante - SLG46534 |
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Descrição semelhante - SLG46534 |
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