LM3915N National Semiconductor, LM3915N Datasheet - Page 18

• Manufacturer Part Number: LM3915N
• Description: IC DRIVER DOT BAR DISPLAY 18-DIP
• Manufacturer: National Semiconductor

Specifications of LM3915N

• Display Type: LED, LCD, Vacuum Fluorescent
• Configuration: Dot/Bar Display
• Digits Or Characters: 10 Steps
• Current - Supply: 6.1mA
• Voltage - Supply: 3 V ~ 25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 18-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Interface: -
• Other names: *LM3915N; LM3915

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 re-
gion
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
) required to pro-
LED
) as
18
measured at the current source outputs As the forward volt-
age 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
a
)
REF
) over the specified range of supply voltage
RHI
) equal to pin 4 voltage (V
L(REF)
)
RLO
)