Analog Microelectronics, Inc.
AME41-1.2
Micropower Voltage Reference Diode
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General Description
The AME41-1.2 is a micropower 2-terminal band-gap volt-
age regulator diode. It operates over a 15µA 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 AME41-1.2 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 packages as well as the space saving SOT-23.
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Key Features
l
Small packages: SOT-23, TO-92, SO-8
l
Tolerates capacitive loads
l
Fixed reverse breakdown voltage of 1.25V
l
Tight voltage tolerance ----------
±0.20%, ±0.50%
l
Wide operating current ---------- 15µA to 20mA
l
Wide temperature range -------- -40
o
C to +85
o
C
l
Low temperature coefficient --- 100ppm/
o
C (max)
l
Excellent transient response
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Applications
l
l
l
l
l
l
Portable electronics
Power supplies
Computer peripherals
Data acquisition systems
Battery chargers
Consumer electronics
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Functional Block Diagram
VR
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Typical Application
VS
RS
B andgap
Cell
Feedbac k
Current
S hunt
VR
V R = 1.25V
GND
1000pF
V alue optional
I
RS =
VS - VR
I
1
Analog Microelectronics, Inc.
AME41-1.2
Micropower Voltage Reference Diode
n
Package Outline
SOT-23 Top View
NC *
TO-92-3 Bottom View
TO-92-2 Bottom View
NC *
+
-
+
-
+
-
SO-8 Top View
NC
NC
NC
-
1
2
3
4
8
7
6
5
+
NC
NC
NC
* The NC pin must float or be connected to - (negative)
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Ordering Information
Part Number
AME41DEET
Accuracy
0.2%
Marking
ACWww
AME
41DEHA
yyww
ACAww
AME
41
AEAS
yyww
AME
41
AEAT
yyww
AME
41AEHA
yyww
Package
SOT-23
Operating Temp. Range
-40
O
C to +85
O
C
AME41DEHA
0.2%
SO-8
-40
O
C to +85
O
C
AME41AEET
0.5%
SOT-23
-40
O
C to +85
O
C
AME41AEAS
0.5%
TO-92-2
-40
O
C to +85
O
C
AME41AEAT
0.5%
TO-92-3
-40
O
C to +85
O
C
AME41AEHA
0.5%
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.
2
Analog Microelectronics, Inc.
AME41-1.2
Micropower Voltage Reference Diode
n
Absolute Maximum Ratings
Parameter
Supply Current
Maximum
50
Unit
mA
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Recommended Operating Conditions
Parameter
Supply Current
Ambient Temperature Range
Junction Temperature
Rating
100
µ
A ~ 20mA
-40 to +85
-40 to +125
o
Unit
C
C
o
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Thermal Information
P a ra m e te r
S O T-23
Therm al Res is tanc e
TO -92
S O -8
M ax im um Junc tion Tem perature
M ax im um Lead Tem perature ( 10 S ec )
M a x im u m
325
180
124
150
300
o
o
Unit
C / W
C
C
o
Caution: Stress above the listed absolute rating may cause permanent damage to the device
3
Analog Microelectronics, Inc.
AME41-1.2
Micropower Voltage Reference Diode
n
Electrical Specifications
Unless otherwise specified, TA = 25
o
C, I = 100
µ
A
PARAMETER
Reference Voltage,
±
0.2%
V
REF
Reference Voltage,
±
0.5%
Minimum Current
Reference Voltage Change With
Current
Reference Voltage Temp. Coeff.
I
MIN
I
MIN
< I < 1mA
dV
REF/I
1mA < I < 20mA
V
REFTC
0
o
C < T
A
< 70
o
C
4
8
100
ppm/
o
C
1.5
SYMBOL
TEST CONDITIONS
T
A
= 25 C, I
REF
= 100
µ
A
o
MIN
1.247
1.244
TYP
1.250
1.250
MAX
1.253
1.256
15
3
UNITS
V
V
µ
A
mV
4
Analog Microelectronics, Inc.
AME41-1.2
Normalized Percentage Change vs.
Temperature
0.1
0
25 C
o
Micropower Voltage Reference Diode
Output Voltage Change vs. Current
25
o
C
5 V /D IV
% Change of V
OUT
-0.1
-0.2
-0.3
-0.4
I = 100µA
85
o
C
V
IN
VR
0 .5 V /D IV
-0.5
-0.6
-50
0
50
100
150
(
O
C)
Reverse Characteristic
100µA
1.0V
Forward Characteristic
10µA
25
o
C
85
o
C
0.125V/div
85
o
C
25
o
C
I
R
1µA
100nA
0.0V
0.65V
1.3V
0.0V
1µA
100µA
10mA
V
R
Transient Response
25 C
o
5V/DIV
V
IN
VR
0.5V/DIV
200µS/DIV
5
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