LM385-2.5
Micropower Voltage Reference Diode
General Description
The LM385-2.5 are micropower
2-terminal band-gap voltage regulator diodes. Operating
over a 20 µA to 20 mA current range, they feature exception-
ally low dynamic impedance and good temperature stability.
On-chip trimming is used to provide tight voltage tolerance.
Features
n
n
n
n
n
±
20 mV (
±
0.8%) max. initial tolerance (A grade)
Operating current of 20 µA to 20 mA
0.6Ω dynamic impedance (A grade)
Low temperature coefficient
Low voltage reference — 2.5V
Connection Diagrams
TO-92
Plastic Package
Ordering No: LM385Z-2.5
Bottom View
LM385Z-2.5
1
2
3
1: "_"
2: "+"
3: NC
1
LM385-2.5
Absolute Maximum Ratings
Soldering Information
TO-92 Package (10 sec.)
Reverse Current
Forward Current
Operating Temperature Range (Note 3)
30 mA
10 mA
260˚C
LM385-2.5
Storage Temperature
0˚C to 70˚C
−55˚C to + 150˚C
Electrical Characteristics
(Note 4)
LM385-2.5
Parameter
Conditions
Typ
Tested
Limit
Reverse Breakdown
Voltage
Design
Limit
Units
(Limits)
T
A
=25 C
o
20uA < I
R
< 20mA
2.500
2.425
2.575
Minimum Operating
Current
Reverse Breakdown
Voltage Change with
Current
Reverse Dynamic
Impedance
Wideband Noise (rms)
Long Term Stability
1 mA
≤
I
R
≤
20 mA
I
R
=
100uA
f = 20 Hz
I
R
= 100 µA
10 Hz
≤
f
≤
10 kHz
I
R
= 100 µA,
T = 1000 Hr,
T
A
= 25˚C
±
0.1˚C
Average Temperature
I
MIN
≤
I
R
≤
20 mA
20
20uA
≤
I
R
≤
1mA
V(Min)
V(Max)
30
uA
(Max)
13
20
2.0
20
2.5
25
mV
(Max)
mV
(Max)
Ω
1
120
µV
ppm
ppm/˚C
(Max)
150
2
LM385-2.5
Typical Performance Characteristics
Reverse Characteristics
Reverse Characteristics
Forward Characteristics
DS005519-15
DS005519-16
DS005519-17
Temperature Drift
Reverse Dynamic
Impedance
Reverse Dynamic
Impedance
DS005519-18
DS005519-19
DS005519-20
Noise Voltage
Filtered Output Noise
Response Time
DS005519-21
DS005519-22
DS005519-23
Applications
Wide Input Range Reference
Micropower Reference from 9V Battery
DS005519-12
LM385-2.5 Applications
3
