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CAT522 Datasheet(PDF) 8 Page - Catalyst Semiconductor |
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CAT522 Datasheet(HTML) 8 Page - Catalyst Semiconductor |
8 / 11 page CAT522 8 Doc. No. 2004, Rev. E APPLICATION CIRCUITS (Cont.) Coarse-Fine Offset Control by Averaging DPP Outputs for Single Power Supply Systems Coarse-Fine Offset Control by Averaging DPP Outputs for Dual Power Supply Systems Digitally Trimmed Voltage Reference Digitally Controlled Voltage Reference + – FINE ADJUST DPP COARSE ADJUST DPP GND VREFL VREFH VDD RC 127RC +V +5V VREF R = ————— C 256 1 µA VREF * Fine adjust gives ± 1 LSB change in V when V = ——— OFFSET VREF 2 OFFSET V OFFSET + – FINE ADJUST DPP COARSE ADJUST DPP GND VREFL VREFH VDD RC 127RC +V +5V +VREF -V -VREF Ro R = ——————————— C 1 µA OFFSET VOFFSET REF (+V ) - (V ) R = ——————————— o 1 µA OFFSET REF (-V ) + (V ) + + CAT522 CAT522 CAT522 LT 1029 I > 2 mA V+ GND VDD V = 5.000V REF VREFH VREFL CONTROL & DATA CAT522 GND VDD VREFH VREFL CONTROL & DATA + – 15K 10 µF 5.1V 10K 4.02 K 1.00K 10 µF 35V LM 324 1N5231B MPT3055EL 28 - 32V OUTPUT 0 - 25V @ 1A |
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