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CAT660ESA-TE13 Datasheet(PDF) 11 Page - Catalyst Semiconductor |
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CAT660ESA-TE13 Datasheet(HTML) 11 Page - Catalyst Semiconductor |
11 / 16 page CAT660 11 Doc. No. 5000, Rev. U PRECISION VOLTAGE DIVIDER A precision voltage divider is shown in figure 9. With very light load currents under 100nA, the voltage at pin 2 will be within 0.002% of V+/2 . Output voltage accuracy decreases with increasing load. BATTERY VOLTAGE SPLITTER Positive and negative voltages that track each other can be obtained from a battery. Figure 10 shows how a 9V battery can provide symmetrical positive and negative voltages equal to one-half the battery voltage. Figure 9: Precision Voltage Divider (Load ≤ 100nA) 1 2 3 4 8 7 6 5 + V+ 3V to 11V + BOOST/FC CAP+ GND CAP- V+ OSC LV OUT CAT660 + 0.002% V+ 2 IL < 100nA Figure 10: Battery Splitter + - (-4.5V) C2 150 µF 1 2 3 4 8 7 6 5 CAT660 + C1 150 µF BOOST/FC CAP+ GND CAP- V+ OSC LV OUT + (4.5V) 3V < VBAT < 11V VBAT 9V BATTERY VBAT 2 VBAT 2 |
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