AME, Inc.
AME385-2.5
Micropower Voltage Reference Diode
n
General Description
The AME385-2.5 is a micropower 2-terminal band-gap
voltage regulator diode. It operates over a 20µA to 20mA
current range. Each circuit is trimmed at wafer sort to
provide a ± 0.20% and ± 0.50% initial tolerance. The de-
sign of the AME385-2.5 allows for a large range of load
capacitances and operating currents. The low start-up
current makes these part ideal for battery applications.
Analog Microelectronics offers this part in a TO-92 and
SO-8 package as well as the space saving SOT-23.
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Functional Block Diagram
VR
Bandgap
Cell
Current
Shunt
n
Features
l
Small packages: SOT-23, TO-92, SO-8
l
Tolerates capacitive loads
l
Fixed reverse breakdown voltage of 2.5V
l
Tight voltage tolerance -------
±0.20%, ±0.5%
l
Wide operating current ------- 20µA to 20mA
l
Wide temperature range ----- -40
o
C to +85
o
C
l
Low temperature coefficient --100ppm/ C
(max)
o
GND
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Typical Application
VS
l
Excellent transient response
RS
VR
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Applications
l
Portable electronics
l
Power supplies
l
Computer peripherals
l
Data acquisition systems
l
Battery chargers
l
Consumer electronics
VS - VR
RS =
I
0.1µF
Value optional
VR = 2.5V
1
AME, Inc.
AME385-2.5
Micropower Voltage Reference Diode
n
Pin Configuration
SO-8
Top View
8
7
6
5
SOT-23
Top View
AME 385-2.5
1. NC
2. NC
3. NC
4.
-
1
2
3
AME 385-2.5
1. +
2.
-
3. NC*
5. NC
6. NC
1
2
3
4
7. NC
8. +
TO-92-3
Bottom View
1
2
3
TO-92-2
Bottom View
AME 385-2.5
1. NC*
2.
3.
+
-
1
2
AME 385-2.5
1. +
2.
-
* The NC pin must float or be connected to - (negative)
2
AME, Inc.
AME385-2.5
Micropower Voltage Reference Diode
n
Ordering Information
AME385 x x x x x
Special Feature
Number of Pins
Package Type
Operating Temperature Range
Accuracy
Accuracy
Operating
Temperature Range
E: -40
O
C to 85
O
C
Package Type
Number of
Pins
Special Feature
D: 0.2%
B: 0.5%
A: TO-92
E: SOT-2X
H: SO-8
A: 8
S: 2
T: 3
L: Low Profile
Y: Lead Free & Low Profile
Z: Lead Free
3
AME, Inc.
AME385-2.5
Micropower Voltage Reference Diode
n
Ordering Information (contd.)
Part Number
AME385DEET
AME385DEETL
AME385DEETY
AME385DEETZ
AME385DEHA
Marking
ACSww
ACSww
ACSww
ACSww
385
DEHA
yyww
385
DEHA
yyww
ABYww
ABYww
ABYww
ABYww
AME
385
BEAT
yyww
AME
385
BEAT
yyww
AME
385
BEAS
yyww
AME
385
BEAS
yyww
385
BEHA
yyww
385
BEHA
yyww
Accuracy
0.2%
0.2%
0.2%
0.2%
0.2%
Package
SOT-23
TSOT-23
TSOT-23
SOT-23
SO-8
Operating Temp. Range
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
AME385DEHAZ
AME385BEET
AME385BEETL
AME385BEETY
AME385BEETZ
0.2%
0.5%
0.5%
0.5%
0.5%
SO-8
SOT-23
TSOT-23
TSOT-23
SOT-23
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
AME385BEAT
0.5%
TO-92-3
- 40
o
C to + 85
o
C
AME385BEATZ
0.5%
TO-92-3
- 40
o
C to + 85
o
C
AME385BEAS
0.5%
TO-92-2
- 40
o
C to + 85
o
C
AME385BEASZ
0.5%
TO-92-2
- 40
o
C to + 85
o
C
AME385BEHA
0.5%
SO-8
- 40
o
C to + 85
o
C
AME385BEHAZ
0.5%
SO-8
- 40
o
C to + 85
o
C
* Package Option
Part Number
AME385XEAX
AME385XEAX-1
Package
TO-92 Taping
TO-92 Bulk
Lead Pitch
5.04mm
2.54mm
Note: yyww & ww represents the date code
* A line on top of the first letter represents lead free plating such as ACS.
Please consult AME sales office or authorized Rep./Distributor for the availability of voltage accuracy and package type.
4
AME, Inc.
AME385-2.5
Micropower Voltage Reference Diode
n
Absolute Maximum Ratings
Parameter
Supply Current
Maximum
50
Unit
mA
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
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Recommended Operating Conditions
Parameter
Supply Current
Ambient Temperature Range
Junction Temperature
Rating
100µA ~ 20mA
- 40 to + 85
- 40 to + 125
Unit
o
C
C
o
n
Thermal Information
Parameter
SOT-23
Thermal Resistance
TO-92
SO-8
Maximum Junction Temperature
Maximum Lead Temperature (10 Sec)
Maximum
325
180
125
150
300
Unit
o
C/W
o
C
C
o
5
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