LM4121 datasheet(3/16 Pages) NSC

Part #	LM4121

Description	Precision Micropower Low Dropout Voltage Reference

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Maximum Voltage on input or

enable pins

−0.3V to 14V

Output Short-Circuit Duration

Indefinite

Power Dissipation (T

A = 25˚C) (Note 2):

MA05B package −

θ

JA

280˚C/W

Power Dissipation

350 mW

ESD Susceptibility (Note 3)

Human Body Model

Machine Model

2kV

200V

Lead Temperature:

Soldering, (10 sec.)

+260˚C

Vapor Phase (60 sec.)

+215˚C

Infrared (15 sec.)

+220˚C

Operating Range (Note 1)

Storage Temperature Range

−65˚C to +150˚C

Ambient Temperature Range

−40˚C to +85˚C

Junction Temperature Range

−40˚C to +125˚C

Electrical Characteristics

LM4121-1.250V Unless otherwise specified V

IN = 3.3V, ILOAD =0, COUT = 0.01µF, TA =Tj = 25˚C. Limits with

standard typeface are for T

j = 25˚C, and limits in boldface type apply over the −40˚C ≤ TA ≤ +85˚C temperature range.

Symbol

Parameter

Conditions

Min (Note 5)

Typ (Note 4)

Max (Note 5)

Units

V

OUT

Output Voltage Initial

Accuracy

LM4121A-1.250

1.250

±0.2

%

LM4121-1.250

±0.5

TCV

OUT/˚C

Temperature Coefficient

−40˚C

≤ T

A ≤ +125˚C

14

50

ppm/˚c

∆V

OUT/∆VIN

Line Regulation

1.8V

≤ V

IN ≤ 12V

0.0007

0.009

0.012

%/V

∆V

OUT/∆ILOAD

Load Regulation

0mA

≤ I

LOAD ≤ 1 mA

0.03

0.08

0.17

%/mA

1mA

≤ I

LOAD ≤ 5 mA

0.01

0.04

0.1

−1 mA

≤ I

LOAD ≤ 0 mA

0.04

0.12

−5 mA

≤ I

LOAD ≤ −1 mA

0.01

Min-V

IN

Minimum Operating Voltage

I

LOAD = 5mA

1.5

1.8

V

N

Output Noise Voltage

0.1 Hz to 10 Hz

20

µV

PP

10 Hz to 10 kHz

30

µV

RMS

I

S

Supply Current

160

250

275

µA

I

SS

Power-down Supply Current

V

IN = 12V

Enable = 0.4V

Enable = 0.2V

1

2

µA

V

H

Logic High Input Voltage

1.6

1.5

V

L

Logic Low Input Voltage

0.4

V

0.2

I

H

Logic High Input Current

7

15

µA

I

L

Logic Low Input Current

0.1

µA

I

SC

Short Circuit Current

V

IN = 3.3V, VOUT =0

15

mA

630

V

IN = 12V, VOUT =0

17

630

Hyst

Thermal Hysteresis

(Note 8)

−40˚C

≤ T

A ≤ 125˚C

0.5

mV/V

∆V

OUT

Long Term Stability

(Note 9)

1000 hrs. @ 25˚C

100

ppm

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