MicropowerVoltageReferenceDiode
General Description
TheLM385-2.5aremicropower
2-terminal band-gap voltage regulator diodes. Operating
over a 20 µAto 20 mAcurrent range, they feature exception-
ally low dynamic impedance and good temperature stability.
On-chip trimming is used to provide tight voltage tolerance.
Features
n±20mV(±0.8%)max.initialtolerance(Agrade)
nOperatingcurrentof20µAto20mA
n0.6Ωdynamicimpedance(Agrade)
nLowtemperaturecoefficient
nLowvoltagereference—2.5V
Connection Diagrams
TO-92
Plastic Package
LM385-2.5
Ordering No: LM385Z-2.5
LM385Z-2.5
Bottom View
1
2
3
1: "_"
2: "+"
3: NC
1
AbsoluteMaximumRatings
Reverse Current 30 mA
Forward Current 10 mA
Operating Temperature Range (Note 3)
LM385-2.5 0˚C to 70˚C
Storage Temperature −55˚C to + 150˚C
Soldering Information
TO-92 Package (10 sec.) 260˚C
Electrical Characteristics
(Note 4)
Parameter Conditions Typ Units
(Limits)
LM385-2.5
Tested Design
Limit Limit
ReverseBreakdown
Voltage
2.500
MinimumOperating
Current (Max)
ReverseBreakdown≤I
R
≤1mA
VoltageChangewith(Max)
Current 1 mA ≤I
R
≤20mA(Max)
Reverse Dynamic I
R
Ω
Impedancef=20Hz
Wideband Noise (rms) I
R
=100 µA 120 µV
10 Hz ≤f≤10 kHz
Long Term Stability I
R
=100 µA,
T=1000 Hr, 20 ppm
T
A
=25˚C ±0.1˚C
Average Temperature I
MIN
≤I
R
≤20 mA ppm/˚C
(Max)
150
LM385-2.5
T
A
=25 C
o
R
20uA < I < 20mA
2.425
2.575
V(Min)
V(Max)
13
20
30
uA
20uA
2.0
2.5
mV
20
25
mV
=
100uA
1
2
Typical Performance Characteristics
Applications
LM385-2.5 Applications
Reverse Characteristics
DS005519-15
Reverse Characteristics
DS005519-16
Forward Characteristics
DS005519-17
Temperature Drift
DS005519-18
Reverse Dynamic
Impedance
DS005519-19
Reverse Dynamic
Impedance
DS005519-20
Noise Voltage
DS005519-21
Filtered Output Noise
DS005519-22
Response Time
DS005519-23
Wide Input Range Reference
DS005519-12
Micropower Reference from 9V Battery
LM385-2.5
3
