Overview
VS001REF is Reference that contains two parts, precision reference voltage generator and reference output voltage (OUTF) buffer. It offers an integrated low-drift, programable and trimmable voltage reference. For applications that require a different reference voltage, the reference has an external reference input option for use with an external reference voltage with low drive capacity. The reference source is selected by the INTREFEN bit. The internal voltage reference requires 0.2ms to settle to 1% and 250ms to fully settle to 0.01% when switching from an external reference source to the internal reference. External band-limiting capacitors determine the amount of reference noise contribution. For precision systems, one can use capacitor values such that the bandwidth is limited to less than 10 Hz in that case the reference noise does not dominate the system noise. In systems with strict ADC power-on requirements, using a large capacitor on the reference increases the time for the voltage to meet the desired value.
Reference output is provided between OUTF and GNDS pins. Reference output voltage is 2.5 V with the capability of sinking and sourcing 10 mA current.
Learn more about Voltage Reference IP core
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