LM2852.5, LM3852.5, LM385B2.5

MICROPOWER VOLTAGE REFERENCES

SLVS023J − JANUARY 1989 − REVISED MARCH 2005

3

POST OFFICE BOX 655303

30 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

97

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

LP package

140

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . .

PW package

149

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds

260

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

2. The package thermal impedance is calculated in accordance with JESD 51-7.

recommended operating conditions

MIN

MAX

UNIT

IZ

Reference current

0.02

20

mA

TA

Operating free-air temperature range

LM285-2.5

−40

85

°C

TA

Operating free-air temperature range

LM385-2.5, LM385B-2.5

0

70

°C

electrical characteristics at specified free-air temperature

PARAMETER

TEST

TA‡

LM285-2.5

LM385-2.5

LM385B-2.5

UNIT

PARAMETER

TEST

CONDITIONS

TA‡

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

VZ

Reference

voltage

IZ = 20 µA

to 20 mA

25

°C

2.462

2.5

2.538

2.425

2.5

2.575

2.462

2.5

2.538

V

αVZ

Average

temperature

coefficient of

reference

voltage§

IZ = 20 µA

to 20 mA

Full range

±20

±20

±20

ppm/

°C

Change in

IZ = 20 µA

25

°C

1

2

2

∆VZ

Change in

reference

IZ = 20 µA

to 1 mA

Full range

1.5

2

2

mV

∆VZ

reference

voltage with

current

IZ = 1 mA

25

°C

10

20

20

mV

voltage with

current

IZ = 1 mA

to 20 mA

Full range

30

30

30

∆VZ/∆t

Long-term

change in

reference

voltage

IZ = 100 µA

25

°C

±20

±20

±20

ppm/khr

IZ(min)

Minimum

reference

current

Full range

8

20

8

20

8

20

µA

zz

Reference

IZ = 100 A

25

°C

0.2

0.6

0.4

1

0.4

1

Ω

zz

Reference

impedance

IZ = 100 µA

Full range

1.5

1.5

1.5

Ω

Vn

Broadband

noise

voltage

IZ = 100 µA,

f = 10 Hz

to 10 kHz

25

°C

120

120

120

µV

‡ Full range is 0°C to 70°C for the LM385-2.5 and LM385B-2.5, and −40°C to 85°C for the LM285-2.5.

§ The average temperature coefficient of reference voltage is defined as the total change in reference voltage divided by the specified temperature

range.