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SLG46127 Datasheet(PDF) 42 Page - Dialog Semiconductor |
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SLG46127 Datasheet(HTML) 42 Page - Dialog Semiconductor |
42 / 88 page 000-0046127-101 Page 41 of 87 SLG46127 Each of the ACMP cells has a negative input signal that is either created from an internal VREF or provided by the external reference/source. Internal Vref accuracy is optimized near 1000 mV selection. Note: Power supply control options have influence on the ACMP operation. 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). Analog comparators have the following configurable options: • Hysteresis: Input signal hysteresis options are Disable, 25 mV, 50 mV, 200 mV. • Low Bandwidth: Enable, Disable; • IN+ Gain: 1X, 0.5X, 0.33X, 0.25X; • IN+ source: • ACMP0 IN+ options are PIN 14, VDD; • ACMP1 IN+ options are PIN 2, ACMP0 IN+; •IN- source: • ACMP0 IN- options are 24 internal reference sources (50 mV – 1200 mV) and VDD/3, VDD/4, PIN 1; • PWR UP=0 – ACMP is powered down; PWR UP=1 – ACMP is powered up. • All ACMPs can have a common negative input. This can be achieved by configuring ACMP0 PIN 1 analog I/O connection. 11.1 ACMP0 Block Diagram Figure 17. ACMP0 Block Diagram 11010 11001- 00000 Internal Vref PIN 1: ACMP0(-) 10 01 PIN 14: ACMP0(+) External VDD 1.71 V ~ 5.5 V Selectable Gain reg <364:363> to ACMP1 MUX input Vref + - From Connection Matrix Output <12> pdb LBW Selection reg <365> Hysteresis Selection reg <362:361> L/S ON after 100 s Delay To Connection Matrix Input<19> reg <360:356> *PIN 14_aio_en; reg <366> OFF after 1 s Delay *PIN 14_aio_en: if reg <385:383> = ’011’ then 1, otherwise: 0 |
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