LM3916 datasheet(25/27 Pages) NSC

25 / 27 page

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

amplifier pin when the reference amplifier is in the linear re-

gion.

Comparator Gain: The ratio of the change in output current

LED) to the change in input voltage (VIN) required to pro-

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)as

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

REF) over the specified range of supply voltage

+).

Load Regulation: The change in reference output voltage

over the specified range of load current (I

L(REF)).

Offset Voltage: The differential input voltage which must be

applied to each comparator to bias the output in the linear re-

gion. Most significant error when the voltage across the in-

ternal voltage divider is small. Specified and tested with pin

6 voltage (V

RHI) equal to pin 4 voltage (VRLO).

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 er-

ror predominates over comparator offset voltage.

Dual-In-Line Package

DS007971-33

Top View

Order Number LM3916N-1

See NS Package Number NA18A

Order Number LM3916N *

See NS Package Number N18A

*Discontinued, Life Time Buy date 12/20/99

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