Analog Microelectronics, Inc.
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AME40
Micropower Voltage Reference Diode
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General Description
The AME40 is a micropower 2-terminal band-gap voltage
regulator diode. It operates over a 40
A to 20mA current
range. Each circuit is trimmed at wafer sort to provide a
0.20% and
0.50% initial tolerance. The design of the
AME40 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,
SO-8 packages as well as the space saving SOT-23.
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Key Features
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Small packages: SOT-23, TO-92, SO-8
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Tolerates capacitive loads
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Fixed reverse breakdown voltage of 2.5V
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Tight voltage tolerance ----------
0.20%,
0.50%
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Wide operating current ---------- 40
A to 20mA
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Wide temperature range -------- -40
o
C to +85
o
C
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Low temperature coefficient --- 100ppm/
o
C (max)
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Excellent transient response
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Typical Application
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Applications
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Portable electronics
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Power supplies
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Computer peripherals
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Data acquisition systems
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Battery chargers
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Consumer electronics
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Functional Block Diagram
G ND
V R
B andgap
Cell
Current
S hunt
V S
V R
RS =
V S - V R
I
V R = 2.5V
1000pF
V alue optional
RS
I
Analog Microelectronics, Inc.
2
Micropower Voltage Reference Diode
AME40
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Ordering Information
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Package Outline
* The NC pin must float or be connected to - (negative)
+
-
+
-
N C
*
N C
*
+
-
SOT-23 Top View
TO-92-3 Bottom View
TO-92-2 Bottom View
N C
+
-
N C
N C
N C
N C
N C
1
2
3
4
5
6
7
8
SO-8 Top View
Part Number
Accuracy
Marking
Package Operating Temp. Range
AME40BEET
0.2%
ACUww
SOT-23
-40
O
C to +85
O
C
AME40BEHA
0.2%
AME
40BEHA
yyww
SO-8
-40
O
C to +85
O
C
AME40AEET
0.5%
ABZww
SOT-23
-40
O
C to +85
O
C
AME40AEAS
0.5%
AME
40
AEAS
yyww
TO-92-2
-40
O
C to +85
O
C
AME40AEAT
0.5%
AME
40
AEAT
yyww
TO-92-3
-40
O
C to +85
O
C
AME40AEHA
0.5%
AME
40AEHA
yyww
SO-8
-40
O
C to +85
O
C
Please consult AME sales office or authorized Rep./Distributor for other voltage accuracy and
package type availability.
Analog Microelectronics, Inc.
3
AME40
Micropower Voltage Reference Diode
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Absolute Maximum Ratings
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Recommended Operating Conditions
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Thermal Information
Caution: Stress above the listed absolute rating may cause permanent damage to the device
Parameter
Maximum
Unit
Supply Current
20
mA
Parameter
Rating
Unit
Supply Current
60
A ~ 12mA
Ambient Temperature Range
-40 to +85
o
C
Junction Temperature
-40 to +125
o
C
Maximum
Unit
SOT-23
336
TO-92
180
Maximum Junction Temperature
150
o
C
Maximum Lead Temperature ( 10 Sec)
300
o
C
o
C / W
Parameter
Thermal Resistance
Analog Microelectronics, Inc.
4
Micropower Voltage Reference Diode
AME40
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Electrical Specifications
Unless otherwise specified, TA
=
25
o
C, I
=
100
A
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Reference Voltage,
0.2%
2.495
2.500
2.505
V
Reference Voltage,
0.5%
2.487
2.500
2.513
V
Minimum Current
I
MIN
40
A
I
MIN
< I < 1mA
1.5
3
1mA < I < 20mA
4
8
Reference Voltage Temp. Coeff.
V
REFTC
0
o
C < T
A
< 70
o
C
100
ppm/
o
C
mV
V
REF
T
A
=
25
o
C, I
REF
=
100
A
Reference Voltage Change With
Current
dV
REF/I
Analog Microelectronics, Inc.
5
AME40
Micropower Voltage Reference Diode
0.125V/div
0.0V
1.0V
Reverse Characteristic
25
o
C
85
o
C
0.0V
0.65V
1.3V
V
R
100
A
10
A
1
A
100nA
I
R
Forward Characteristic
85
o
C
25
o
C
1
A
100
A
10mA
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
-50
0
50
100
150
Normalized Percentage Change vs.
Temperature
% Change of V
OUT
(
O
C)
I = 100
A
V R
V
IN
5 V /D IV
0 .5 V /D IV
2 5
o
C
Transient Response
200
S/DIV
Output Voltage Change vs. Current
VR
V
IN
5V/DIV
0.5V/DIV
25
o
C
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