LM4040C20ILPE3

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The LM4040C20ILPE3 is a precision voltage reference devicethat is part of a larger voltage references family manufactured byTexas Instruments. It is designed for use in both generalpurpose and high accuracy applications and can act aseither a positive or a negative reference. The device ischaracterized by low noise, low drift, and high accuracy. Itoperates over a wide temperature range and is available inthe common 8-lead, SOIC package. The LM4040C20ILPE3 canbe used in a number of applications where precisionvoltage control is needed such as automotive, instrumentation,industrial, and medical systems.The LM4040C20ILPE3 is a two terminal, low-dropoutvoltage reference circuit. It can be configured to provideeither a 0.2V or 0.4V output voltage depending on the inputvoltage. The device is designed for precision regulation of theoutput voltage over a wide range of input supply voltages. Itsoutput voltage is maintained over line and load conditionswithout a current-limiting resistor in series.The LM4040C20ILPE3 features an innovative designthat combines a temperature controlled oscillator and anon-chip comparator to provide accurate referencevoltages. The device incorporates a proprietary activetemperature coefficient cancellation that maintains anaccurate output voltage vs temperature at most any givenload current. This reduces the errors caused by thevarious inputs and tolerances that influence the outputvoltage over temperature vs output load conditions.The LM4040C20ILPE3 is a monolithic integrated circuitwith a very simple layout. Internally, the device consists of acurrent-limited reference source, a temperature controlledoscillator, and an on-chip comparator. The referencesource operates using a voltage-divider structure wherethe current flow through the divider is kept constant. Thisensures that the reference voltage stays constant over varyingtemperature and input supply conditions.The temperature-controlled oscillator is used to provideprecise temperature compensation for the referencevoltage. The oscillator monitors the temperature of thedevice and changes its operation in order to maintain anaccurate reference voltage over the device\'s specifiedoperating temperature range.The on-chip comparator is used to compare thereference voltage generated by the temperature-controlledoscillator to the voltage generated by the voltage divider.If the reference voltage is higher than the voltage generatedby the voltage-divider, then the output is set to high, andvice versa. This ensures that the output voltage ismaintained within a certain range over varyingtemperatures and input supply conditions.The LM4040C20ILPE3 is used in a variety ofapplications such as automotive, industrial, and medicalinstrumentation systems. It can be used as a referencesource for voltage control circuits that require precisionregulation or as an active temperature coefficientcancellation for circuits that require accurate trackingover temperature. In addition, the device is suitable for anumber of general-purpose applications such as voltagemonitoring and current limit protection.Overall, the LM4040C20ILPE3 provides precisionvoltage control over a wide range of operatingconditions. Its simple design ensures accurate and reliableconditioning performance in a wide variety ofapplications including automotive, industrial, and medicalinstrumentation systems.

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