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XR-2278

Part Number	XR-2278
Manufacturer	Exar
Description	Dot and Bar Graph Display Generators
Published	Apr 6, 2018
Detailed Description	XR·2277/2278 Dot and Bar Graph Display Generators GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM The XR-2277 and XR-22...
Datasheet	XR-2278 PDF File

Overview

XR·2277/2278 Dot and Bar Graph Display Generators GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM The XR-2277 and XR-2278 are 12 point level detector circuits designed for direct interfacing to light emitting diode (LED) moving-dot or bar-graph displays.
Each of the circuits is comprised of an input buffer amplifier and 12 comparators, biased from a resistor string at logarithmic intervals.
Accuracy is enhanced by an internal reference.
Each comparator provides a high impedance current source output which are all very closely matched and simultaneously adjustable with a single external resistor.
A control signal applied to the mode select pin determines whether the display is driven in a mo...

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