AME, Inc.
AME385-1.2
Micropower Voltage Reference Diode
n
General Description
The AME385-1.2 is a micropower 2-terminal band-gap
voltage regulator diode. It operates over a 15µA to 20mA
current range. Each circuit is trimmed at wafer sort to
provide a
±0.2%
and
±0.5%
initial tolerance. The de-
sign of the AME385-1.2 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.
n
Key Features
l
Small packages: SOT-23, TO-92, SO-8
l
Tolerates capacitive loads
l
Fixed reverse breakdown voltage of 1.235V
l
Tight voltage tolerance ----------
±0.20%, ±0.5%
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
VR=1.235V
GND
0.1µF
Value optional
I
RS =
1
VS -VR
I
AME, Inc.
AME385-1.2
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 - (nega-
tive)
n
Ordering Information
Part N umber
A ME385CE ET
Accuracy
0.2%
Marking
A CQww
A ME
385CEHA
yyww
A ME
385
A EA S
yyww
A ME
385
A EA T
yyww
A BXww
A ME
385A EHA
yyww
Package Operating Temp. R ange
S OT-23
-40
O
C to +85
O
C
A ME385CE HA
0.2%
S O-8
-40
O
C to +85
O
C
A M E385A E AS
0.5%
TO-92-2
-40
O
C to +85
O
C
A M E385A E AT
0.5%
TO-92-3
-40
O
C to +85
O
C
A M E385A E ET
0.5%
S OT-23
-40
O
C to +85
O
C
A M E385A E HA
0.5%
S O-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
AME, Inc.
AME385-1.2
Micropower Voltage Reference Diode
n
Absolute Maximum Ratings
Parame te r
Supply Current
Maximum
50
Unit
mA
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
n
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
n
Thermal Information
P a ra m e te r
S O T-2 3
Th e rm a l R e s is t a n c e
TO -9 2
S O -8
M ax im u m Jun c t io n Te m p era t u re
M ax im u m L e a d Te m p e ra tu re ( 1 0 S e c )
M a x im u m
325
180
125
150
300
o
o
Un it
C / W
C
C
o
3
AME, Inc.
AME385-1.2
Micropower Voltage Reference Diode
n
Electrical Specifications
Unless otherwise specified, TA = 0 ~70
o
C, I
R
= 100
µ
A
PARAMETER
Reference Voltage,
±
0.2%
V
REF
Reference Voltage,
±
0.5%
Minimum Current
Reference Voltage Change With
Current
Maximum Operation Current
Reverse Dynamic Impedence
Wideband Noise (rms)
Long term Stability
Reference Voltage Temp. Coeff.
V
REFTC
I
MIN
I
MIN
< I < 1mA
dV
REF/I
1mA < I < 20mA
IL
max
RDI
Vn
I
R
= 100
µ
A, f=20Hz
I
R
= 100
µ
A, 10 Hz<f<10KHz
I
R
= 100
µ
A, T
A
=25
O
C,
T=1000 Hours
0
o
C < T
A
< 70
o
C
20
1.5
60
20
100
5
20
mA
Ohm
µ
V
ppm
ppm/
o
C
1.5
SYMBOL
TEST CONDITIONS
I
REF
= 100
µ
A
MIN
1.232
1.229
TYP
1.235
1.235
MAX
1.238
1.241
15
3
UNITS
V
V
µ
A
mV
4
AME, Inc.
AME385-1.2
Normalized Percentage Change vs.
Temperature
0.1
0
2
Micropower Voltage Reference Diode
Output Voltage Change vs. Current
% Change of V
OUT
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-50
-1
0
I = 100µA
(mV)
1
0
50
100
150
0.0
1
(mA)
100
(
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
stm32/stm8
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