Part Number
|
XR-2277 |
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-2277
|
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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