Datasheet

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  
SLVS023J − JANUARY 1989 − REVISED MARCH 2005
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Reverse current, I
R
30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forward current, I
F
10 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Notes 1 and 2): D package 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
−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: 1. Maximum power dissipation is a function of T
J(max)
,
θ
JA
, and T
A
. The maximum allowable power dissipation at any allowable ambient
temperature is P
D
= (T
J(max)
− T
A
)/
θ
JA
. Operation at the absolute maximum T
J
of 150°C can affect reliability.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN MAX UNIT
I
Z
Reference current 0.02 20 mA
T
A
Operating free-air temperature range
LM285-2.5 −40 85
°C
T
A
Operating free-air temperature range
LM385-2.5, LM385B-2.5 0 70
°
C
electrical characteristics at specified free-air temperature
PARAMETER
TEST
T
A
‡
LM285-2.5 LM385-2.5 LM385B-2.5
UNIT
PARAMETER
TEST
CONDITIONS
T
A
‡
MIN TYP MAX MIN TYP MAX MIN TYP MAX
UNIT
V
Z
Reference
voltage
I
Z
= 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
α
VZ
Average
temperature
coefficient of
reference
voltage
§
I
Z
= 20 µA
to 20 mA
Full range ±20 ±20 ±20 ppm/°C
Change in
I
Z
= 20 µA
25°C 1 2 2
∆V
Z
Change in
reference
I
Z
= 20 µA
to 1 mA
Full range 1.5 2 2
mV
∆V
Z
reference
voltage with
current
I
Z
= 1 mA
25°C 10 20 20
mV
voltage with
current
I
Z
= 1 mA
to 20 mA
Full range 30 30 30
∆V
Z
/∆t
Long-term
change in
reference
voltage
I
Z
= 100 µA 25°C ±20 ±20 ±20 ppm/khr
I
Z(min)
Minimum
reference
current
Full range 8 20 8 20 8 20 µA
z
z
Reference
I
Z
= 100 A
25°C 0.2 0.6 0.4 1 0.4 1
Ω
z
z
Reference
impedance
I
Z
= 100 µA
Full range 1.5 1.5 1.5
Ω
V
n
Broadband
noise
voltage
I
Z
= 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.