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X9313UMIZ Datasheet(PDF) 9 Page - Intersil Corporation |
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X9313UMIZ Datasheet(HTML) 9 Page - Intersil Corporation |
9 / 11 page 9 FN8177.2 September 9, 2005 Applications Information Electronic digitally controlled potentiometers (XDCP) provide three powerful application advantages; (1) the variability and reliability of a solid-state potentiometer, (2) the flexibility of computer-based digital controls, and (3) the retentivity of nonvolatile memory used for the storage of multiple potentiometer settings or data. Basic Configurations of Electronic Potentiometers Basic Circuits VR VW/RW VR I THREE-TERMINAL POTENTIOMETER; VARIABLE VOLTAGE DIVIDER TWO-TERMINAL VARIABLE RESISTOR; VARIABLE CURRENT VH VL CASCADING TECHNIQUES BUFFERED REFERENCE VOLTAGE – + +5V R1 +V -5V VW VREF VOUT OP-07 VW VW/RW +V +V +V X (a) (b) VOUT = VW/RW NONINVERTING AMPLIFIER + – VS VO R2 R1 VO = (1 + R2 / R1)VS LM308A VOLTAGE REGULATOR R1 R2 Iadj VO (REG) = 1.25V (1 + R2 / R1) + IADJ R2 VO (REG) VIN 317 OFFSET VOLTAGE ADJUSTMENT + – VS VO R2 R1 100k Ω 10k Ω 10k Ω 10k Ω -12V +12V TL072 COMPARATOR WITH HYSTERESIS VUL = [R1 / (R1 + R2)] VO(max) VLL = [R1 / (R1 + R2)] VO(min) + – VS VO R2 R1 LT311A +5V -5V (for additional circuits see AN115) X9313 |
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