LM3915MWC National Semiconductor Corporation, LM3915MWC Datasheet - Page 22

• Manufacturer Part Number: LM3915MWC
• Description: Dot/bar Display Driver
• Manufacturer: National Semiconductor Corporation

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Connection Diagram
Definition of Terms
Absolute Accuracy: The difference between the observed
threshold voltage and the ideal threshold voltage for each
comparator. Specified and tested with 10V across the inter-
nal voltage divider so that resistor ratio matching error pre-
dominates over comparator offset voltage.
Adjust Pin Current: Current flowing out of the reference
adjust pin when the reference amplifier is in the linear region.
Comparator Gain: The ratio of the change in output current
(I
duce it for a comparator in the linear region.
Dropout Voltage: The voltage measured at the current
source outputs required to make the output current fall by
10%.
Input Bias Current: Current flowing out of the signal input
when the input buffer is in the linear region.
LED Current Regulation: The change in output current over
the specified range of LED supply voltage (V
LED
) to the change in input voltage (V
*
IN
Discontinued, Life Time Buy date 12/20/99
) required to pro-
See NS Package Number NA18A
LED
See NS Package Number N18A
Order Number LM3915N-1
Order Number LM3915N
) as mea-
Dual-in-Line Package
Top View
22
sured at the current source outputs. As the forward voltage
of an LED does not change significantly with a small change
in forward current, this is equivalent to changing the voltage
at the LED anodes by the same amount.
Line Regulation: The average change in reference output
voltage (V
(V
Load Regulation: The change in reference output voltage
over the specified range of load current (I
Offset Voltage: The differential input voltage which must be
applied to each comparator to bias the output in the linear
region. Most significant error when the voltage across the
internal voltage divider is small. Specified and tested with pin
6 voltage (V
Relative Accuracy: The difference between any two adja-
cent threshold points. Specified and tested with 10V across
the internal voltage divider so that resistor ratio matching
error predominates over comparator offset voltage.
+
).
*
REF
RHI
) over the specified range of supply voltage
DS005104-32
) equal to pin 4 voltage (V
RLO
L(REF)
).
).