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EMC1823 Datasheet(PDF) 23 Page - Microchip Technology |
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EMC1823 Datasheet(HTML) 23 Page - Microchip Technology |
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23 / 103 page  ...........continued CONV<3:0> Conversions/ Second HEX 3 2 1 0 4h 0 1 0 0 1 5h 0 1 0 1 2 6h 0 1 1 0 4 (default) 7h 0 1 1 1 8 8h 1 0 0 0 16 9h 1 0 0 1 32 Ah 1 0 1 0 64 Bh - Fh All others 1 7.10 Dynamic Averaging Dynamic averaging causes the EMC1822/23/24/25/43 devices to measure the external diode channels for an extended time based on the selected conversion rate. This functionality can be disabled for increased power savings at the lower conversion rates. When dynamic averaging is enabled, the devices automatically adjust the sampling and measurement time for the external diode channels. This allows the devices to average 2x to 16x longer than the normal 11-bit operation (nominally 21 ms per channel) while still maintaining the selected conversion rate. The benefits of dynamic averaging are improved noise rejection due to the longer integration time as well as less random variation of the temperature measurement. When enabled, the dynamic averaging applies when a one-shot command is issued. The devices perform the desired averaging during the one-shot operation according to the selected conversion rate. When enabled, the dynamic averaging affects the average supply current based on the chosen conversion rate as shown in the following table. Table 7-5. Supply Current vs. Conversion Rate for EMC1825 Conversion Rate Average Supply Current Averaging Factor (based on 11-bit operation) Dynamic Averaging State Enabled (default) Disabled Enabled (default) Disabled 1/16s 144 µA 80 µA 16x 1x 1/8s 213 µA 86 µA 16x 1x 1/4s 351 µA 97 µA 16x 1x 1/2s 627 µA 120 µA 16x 1x 1/s 637 µA 164 µA 16x 1x 2/s 659 µA 253 µA 16x 1x 4/s (default) 703 µA 432 µA 8x 1x Multi-Channel Low Voltage Temp Sens... System Block Diagram © 2018 Microchip Technology Inc. Datasheet DS20006048A-page 23 |
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