LM3914N-1 datasheet(4/29 Pages) TI1

Part #	LM3914N-1

Description	LM3914 Dot/Bar Display Driver

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Manufacturer	TI1 [Texas Instruments]

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LM3914

SNVS761B – JANUARY 2000 – REVISED MARCH 2013

www.ti.com

ELECTRICAL CHARACTERISTICS

(1)(2) (continued)

Parameter

Conditions (1)

Min

Typ

Max

Units

VOLTAGE REFERENCE

Output Voltage

0.1 mA

≤ IL(REF) ≤ 4 mA,

1.2

1.28

1.34

V

V+ = VLED = 5V

Line Regulation

3V

≤ V+ ≤ 18V

0.01

0.03

%/V

Load Regulation

0.1 mA

≤ IL(REF) ≤ 4 mA,

0.4

2

%

V+ = VLED = 5V

Output Voltage Change with

0°C

≤ TA ≤ +70°C, IL(REF) = 1 mA,

1

%

Temperature

V+ = 5V

Adjust Pin Current

75

120

μA

OUTPUT DRIVERS

LED Current

V+ = VLED = 5V, IL(REF) = 1 mA

7

10

13

mA

VLED = 5V

ILED = 2 mA

0.12

0.4

LED Current Difference (Between

mA

Largest and Smallest LED Currents)

ILED = 20 mA

1.2

3

LED Current Regulation

2V

≤ VLED ≤ 17V

ILED = 2 mA

0.1

0.25

mA

ILED = 20 mA

1

3

Dropout Voltage

ILED(ON) = 20 mA, VLED = 5V,

1.5

V

ΔILED = 2 mA

Saturation Voltage

ILED = 2.0 mA, IL(REF) = 0.4 mA

0.15

0.4

V

Output Leakage, Each Collector

(Bar Mode) (4)

0.1

10

μA

Output Leakage

(Dot Mode) (4)

Pins 10–18

0.1

10

μA

Pin 1

60

150

450

μA

SUPPLY CURRENT

Standby Supply Current

V+ = 5V,

2.4

4.2

mA

(All Outputs Off)

IL(REF) = 0.2 mA

V+ = 20V,

6.1

9.2

mA

IL(REF) = 1.0 mA

(4)

Bar mode results when pin 9 is within 20mV of V+. Dot mode results when pin 9 is pulled at least 200mV below V+ or left open circuit.

LED No. 10 (pin 10 output current) is disabled if pin 9 is pulled 0.9V or more below VLED.

4

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