lm285

LM285, LM385B

Micropower Voltage Reference Diodes

The LM285/LM385 series are micropower two?terminal bandgap voltage regulator diodes. Designed to operate over a wide current range of 10 m A to 20 mA, these devices feature exceptionally low dynamic impedance, low noise and stable operation over time and temperature. Tight voltage tolerances are achieved by on?chip trimming. The large dynamic operating range enables these devices to be used in applications with widely varying supplies with excellent regulation. Extremely low operating current make these devices ideal for micropower circuitry like portable instrumentation, regulators and other analog circuitry where extended battery life is required.

The LM285/LM385 series are packaged in a low cost TO?226 plastic case and are available in two voltage versions of 1.235 V and 2.500 V as denoted by the device suffix (see Ordering Information table). The LM285 is specified over a ?40°C to +85°C temperature range while the LM385 is rated from 0°C to +70°C.

The LM385 is also available in a surface mount plastic package in voltages of 1.235 V and 2.500 V.

Features

?Pb?Free Packages are Available

?Operating Current from 10 m A to 20 mA

?1.0%, 1.5%, 2.0% and 3.0% Initial Tolerance Grades

?Low Temperature Coefficient

?1.0 W Dynamic Impedance

?Surface Mount Package Available

Figure 1. Representative Schematic Diagram

https://www.wendangku.net/doc/b011872453.html,

See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet.

ORDERING INFORMATION

MAXIMUM RATINGS (T A = 25°C, unless otherwise noted)

values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected.

ELECTRICAL CHARACTERISTICS (T

= 25°C, unless otherwise noted)

T high=+85°C for LM285?1.2, LM285?2.5

T low= 0°C for LM385?1.2, LM385B?1.2, LM385?2.5, LM385B?2.5

T high=+70°C for LM385?1.2, LM385B?1.2, LM385?2.5, LM385B?2.5

ELECTRICAL CHARACTERISTICS (T A = 25°C, unless otherwise noted)

low

T high=+85°C for LM285?1.2, LM285?2.5

T low= 0°C for LM385?1.2, LM385B?1.2, LM385?2.5, LM385B?2.5

T high=+70°C for LM385?1.2, LM385B?1.2, LM385?2.5, LM385B?2.5

t, TIME (ms)

1.251.500.750.5000.25100

1.00O U T P U T (V )

I N P U T (V )

√100

875

1.0 K

100 k

10 K

10

0125250375

750625500f, FREQUENCY (Hz)

e n , N O I S E (n V /H z )

T A , AMBIENT TEMPERATURE (°C)

1.210

1.220

1.230

1.240

1.250V (B R )R , R E V E R S E V O L T A G E (V )

1.21.00.80.60.40.20I F , FORWARD CURRENT (mA)

V F , F O R W A R D V O L T A G E (V )

10

1.0

0.1

V(BR), REVERSE VOLTAGE (V)

, R E V E R S E C U R R E N T ( A )

μI R 0.1

1.010

100

0.01

8.06.04.02.00?2.0

10I R , REVERSE CURRENT (mA)

V (B R )R , R E V E R S E V O L T A G E C H A N G E (m ?Figure 2. Reverse Characteristics Figure 3. Reverse Characteristics

Figure 4. Forward Characteristics Figure 5. Temperature Drift

Figure 6. Noise Voltage

Figure 7. Response Time

t, TIME (ms)

√0

250500750

1500

1250

1000f, FREQUENCY (Hz)

e n , N O I S E (n V /H z )

1.21.00.80.60.40.20V F , F O R W A R D V O L T A G E (V )

10

1.0

0.1

, R E V E R S E C U R R E N T ( A )

μI R Figure 12. Noise Voltage Figure 13. Response Time

Specifications Brochure, BRD8011/D.

TO?92 (TO?226)

Z SUFFIX

NOTES:

1.DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2.CONTROLLING DIMENSION: INCH.

3.CONTOUR OF PACKAGE BEYOND DIMENSION R

IS UNCONTROLLED.

4.LEAD DIMENSION IS UNCONTROLLED IN P AND

BEYOND DIMENSION K MINIMUM.

DIM MIN MAX MIN MAX

MILLIMETERS

INCHES

A0.1750.205 4.45 5.20

B0.1700.210 4.32 5.33

C0.1250.165 3.18 4.19

D0.0160.0210.4070.533

G0.0450.055 1.15 1.39

H0.0950.105 2.42 2.66

J0.0150.0200.390.50

K0.500???12.70???

L0.250??? 6.35???

N0.0800.105 2.04 2.66

P???0.100??? 2.54

R0.115??? 2.93???

V0.135??? 3.43???

SOIC?8 NB CASE 751?07ISSUE AB

ǒmm inches

ǔSCALE 6:1

*For additional information on our Pb?Free strategy and soldering

details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.

SOLDERING FOOTPRINT*

NOTES:

1.DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 198

2.

2.CONTROLLING DIMENSION: MILLIMETER.

3.DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION.

4.MAXIMUM MOLD PROTRUSION 0.15 (0.006)PER SIDE.

5.DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR

PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION.

6.751?01 THRU 751?06 ARE OBSOLETE. NEW STANDARD IS 751?0

7.

DIM A MIN MAX MIN MAX INCHES

4.80

5.000.1890.197MILLIMETERS B 3.80 4.000.1500.157C 1.35 1.750.0530.069D 0.330.510.0130.020G 1.27 BSC 0.050 BSC H 0.100.250.0040.010J 0.190.250.0070.010K 0.40 1.270.0160.050M 0 8 0 8 N 0.250.500.0100.020S

5.80

6.20

0.2280.244

Y

M

0.25 (0.010)

Z S

X

S

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