AME, Inc.
1
AME385-2.5
Micropower Voltage Reference Diode
n Typical Application
n Functional Block Diagram
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 ----- -40oC to +85oC
l Low temperature coefficient --100ppm/oC (max)
l Excellent transient response
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.
l Portable electronics
l Power supplies
l Computer peripherals
l Data acquisition systems
l Battery chargers
l Consumer electronics
n General Description
n Features
n Applications
GND
VR
Bandgap
Cell Current
Shunt
VS
0.1µF
Value optional
I
RS =
VR = 2.5V
VR
VS - VR
RS
AME, Inc.
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Micropower Voltage Reference Diode
AME385-2.5
n Pin Configuration
AME 385-2.5
1. NC
2. NC
3. NC
4. -
5. NC
6. NC
7. NC
8. +
SO-8
Top View SOT-23
Top View
TO-92-3
Bottom View TO-92-2
Bottom View
* The NC pin must float or be connected to - (negative)
AME 385-2.5
1. +
2. -
3. NC*
1 32 4
5678
1 2
3
1 2 3 AME 385-2.5
1. +
2. -
AME 385-2.5
1. NC*
2. +
3. -
1 2
AME, Inc.
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AME385-2.5
Micropower Voltage Reference Diode
n Ordering Information
Operating Temperature Range
Number of Pins
Package Type
Accuracy
Special Feature
AME385 x x x x x
D:
0.2%
E:
-40
O
C to 85
O
C
A:
TO-92
A:
8
L:
B:
0.5%
E:
SOT-2X
S:
2
Y:
Lead Free & Low Profile
H:
SO-8
T:
3
Z:
Lead Free
Special FeatureAccuracy Operating
Temperature Range Package Type Number of
Pins
AME, Inc.
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Micropower Voltage Reference Diode
AME385-2.5
n Ordering Information (contd.)
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.
Part Number Marking Accuracy Package Operating Temp. Range
AME385DEET ACSww 0.2% SOT-23 - 40oC to + 85oC
AME385DEETL ACSww 0.2% TSOT-23 - 40oC to + 85oC
AME385DEETY ACSww 0.2% TSOT-23 - 40oC to + 85oC
AME385DEETZ ACSww 0.2% SOT-23 - 40oC to + 85oC
AME385DEHA 385
DEHA
yyww 0.2% SO-8 - 40oC to + 85oC
AME385DEHAZ 385
DEHA
yyww 0.2% SO-8 - 40oC to + 85oC
AME385BEET ABYww 0.5% SOT-23 - 40oC to + 85oC
AME385BEETL ABYww 0.5% TSOT-23 - 40oC to + 85oC
AME385BEETY ABYww 0.5% TSOT-23 - 40oC to + 85oC
AME385BEETZ ABYww 0.5% SOT-23 - 40oC to + 85oC
AME385BEAT
AME
385
BEAT
yyww
0.5% TO-92-3 - 40oC to + 85oC
AME385BEATZ
AME
385
BEAT
yyww
0.5% TO-92-3 - 40oC to + 85oC
AME385BEAS
AME
385
BEAS
yyww
0.5% TO-92-2 - 40oC to + 85oC
AME385BEASZ
AME
385
BEAS
yyww
0.5% TO-92-2 - 40oC to + 85oC
AME385BEHA 385
BEHA
yyww 0.5% SO-8 - 40oC to + 85oC
AME385BEHAZ 385
BEHA
yyww 0.5% SO-8 - 40oC to + 85oC
Part Number Package Lead Pitch
AME385XEAX TO-92 Taping 5.04mm
AME385XEAX-1 TO-92 Bulk 2.54mm
* Package Option
AME, Inc.
5
AME385-2.5
Micropower Voltage Reference Diode
Maximum Unit
SOT-23 325
TO-92 180
SO-8 125
Maximum Junction Temperature 150 oC
Maximum Lead Temperature (10 Sec) 300 oC
Thermal Resistance oC / W
Parameter
n Absolute Maximum Ratings
n Recommended Operating Conditions
n Thermal Information
Parameter Maximum Unit
Supply Current 50 mA
Parameter Rating Unit
Supply Current 100µA ~ 20mA
Ambient Temperature Range - 40 to + 85 oC
Junction Temperature - 40 to + 125 oC
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
AME, Inc.
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Micropower Voltage Reference Diode
AME385-2.5
Parameter Symbol Min Typ Max Units
Reference Voltage, ±0.2% 2.495 2.50 2.505 V
Reference Voltage, ±0.5% 2.487 2.50 2.513 V
Minimum Current IMIN 20 µA
1.5 3mV
5 20
Maximum Operation Current ILmax 20 mA
Reverse Dynamic Impedence RDI 1.5 Ohm
Wideband Noise (rms) Vn 60 µV
Long term Stability 20 ppm
Reference Voltage Temp.
Coeff. VREFTC 100 ppm/oC
Test Condition
IREF = 100µA
IMIN < I < 1mA
1mA < I < 20mA
Reference Voltage Change
With Current dVREF/I
VREF
IR= 100mA, f=20Hz
IR= 100mA, 10 Hz<f<10KHz
IR= 100mA, TA=25oC,
T=1000 Hours
0oC < TA < 70oC
n Electrical Specifications
Unless otherwise specified, TA = 0~70OC, I = 100µA
AME, Inc.
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AME385-2.5
Micropower Voltage Reference Diode
Normalized Percentage Change vs. Temp. Reference Voltage Change vs. Current
Reverse Characteristic Forward Characteristic
Line Transient Response
5V/DIV
1V/DIV
VR
V
IN
25
o
C
200
µ
S/DIV
Operation Current (mA)
Change of VREF (mV)
1100
-2
0
2
4
0.01
Temperature (oC)
Change of VREF (%)
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
-50 050 100 150
I=100µA
0.65 1.3
0.1
1
10
100
0
VR (V)
IR (uA)
85OC
25OC
IF (mA)
85OC
25OC
VF(V)
0.1 10
0
0.125
1
0.001
AME, Inc.
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Micropower Voltage Reference Diode
AME385-2.5
n Package Dimension
SOT-23
MIN MAX MIN MAX
A1.00 1.40 0.0394 0.0551
A10.00 0.15 0.0000 0.0059
b0.35 0.50 0.0138 0.0197
C0.09 0.25 0.0035 0.0098
D2.70 3.10 0.1063 0.1220
E1.40 1.80 0.0551 0.0709
e
H2.40 3.00 0.09449 0.11811
L
θ10o10o0o10o
SYMBOLS MILLIMETERS INCHES
1.90 BSC 0.0748 BSC
0.35BSC 0.0138BSC
b
θ1
C
D
H
E
e
L
A
A1
Top View Side View
Front View
TSOT-23
b
θ1
C
D
H
E
e
L
A
A1
Top View Side View
Front View
MIN MAX MIN MAX
A+A10.80 1.30 0.0315 0.0512
b0.35 0.50 0.0138 0.0197
C0.08 0.25 0.0031 0.0098
D2.70 3.10 0.1063 0.1220
E1.20 1.80 0.0472 0.0709
e
H2.40 3.00 0.09449 0.11811
L
θ10o10o0o10o
1.90 BSC 0.0748 BSC
0.35BSC 0.0138BSC
SYMBOLS MILLIMETERS INCHES
AME, Inc.
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AME385-2.5
Micropower Voltage Reference Diode
MIN MAX MIN MAX
A4.00 4.95 0.1575 0.1949
b
E
e
e1
L12.70 15.49 0.5000 0.6098
R
W0.35 0.76 0.0138 0.0299
D3.80 4.95 0.1496 0.1949
SYMBOLS MILLIMETERS INCHES
0.40REF 0.0157REF
2.54REF
1.27REF
3.94REF 0.1551REF
2.29
0.1000REF
0.0500REF
0.0902
MIN MAX MIN MAX
A2.80 4.95 0.1102 0.1949
b
E
e
e1
L12.70 15.49 0.5000 0.6098
R
W0.35 0.76 0.0138 0.0299
D3.80 4.95 0.1496 0.1949
2.29
0.1000REF
0.0500REF
0.0902
2.54REF
1.27REF
SYMBOLS MILLIMETERS INCHES
0.40REF 0.0157REF
3.94REF 0.1551REF
TO-92-3 (bulk pack)
TO-92-2 (bulk pack)
n Package Dimension
Notes:
1. Package outline exclusive of any mold flashes dimension.
2. Package outline exclusive of burr dimension.
3. Lead pitch=2.54mm is bulk pack.
4. Lead pitch=5.08mm is tape pack.
Notes:
1. Package outline exclusive of any mold flashes dimension.
2. Package outline exclusive of burr dimension.
3. Lead pitch=2.54mm is bulk pack.
4. Lead pitch=5.08mm is tape pack.
Top View
Side View
e
D
L
w
e1
A
E
R
b
E-PIN C 1/16
Top View
Side View
ew
e1
R
b
E-PIN C 1/16
L
A
E
D
AME, Inc.
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Micropower Voltage Reference Diode
AME385-2.5
MIN MAX MIN MAX
A2.80 4.95 0.1102 0.1949
b
E2.40 3.94 0.0945 0.1551
e
e1
L12.70 15.49 0.5000 0.6098
R
W0.35 0.76 0.0138 0.0299
D3.80 4.95 0.1496 0.1949
SYMBOLS MILLIMETERS INCHES
0.40REF 0.0157REF
5.08REF
2.54REF
2.00
0.2REF
0.1REF
0.0787
MIN MAX MIN MAX
A2.80 4.95 0.1102 0.1949
b
E2.40 3.94 0.0945 0.1551
e
e1
L12.70 15.49 0.5000 0.6098
R
W0.35 0.76 0.0138 0.0299
D3.80 4.95 0.1496 0.1949
2.00
0.2REF
0.1REF
0.0787
SYMBOLS MILLIMETERS INCHES
0.40REF 0.0157REF
5.08REF
2.54REF
n Package Dimension
TO-92-3 (tape pack)
TO-92-2 (tape pack)
Notes:
1. Package outline exclusive of any mold flashes.
2. Package outline exclusive of burr dimension.
3. Lead pitch=2.54mm is bulk pack.
4. Lead pitch=5.08mm is tape pack.
Notes:
1. Package outline exclusive of any mold flashes.
2. Package outline exclusive of burr dimension.
3. Lead pitch=2.54mm is bulk pack.
4. Lead pitch=5.08mm is tape pack.
Top View
Side View
ew
e1
R
b
E-PIN C 1/16
D
E
L
A
Top View
Side View
ew
e1
R
b
E-PIN C 1/16
A
E
D
L
AME, Inc.
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AME385-2.5
Micropower Voltage Reference Diode
SO-8
n Package Dimension
7o(4X)
θ
Top View Side View
Front View
D
E
L
A
A2A1
e
B
CMIN MAX MIN MAX
A1.35 1.75 0.05315 0.0689
A10.10 0.25 0.00394 0.00984
A2
B0.33 0.51 0.01299 0.02008
C0.19 0.25 0.00748 0.00984
D4.80 5.00 0.18898 0.19685
E3.80 4.00 0.14961 0.15748
e
L0.40 1.27 0.01575 0.05
y-0.10 -0.004
θ0o8o0o8o
1.473 REF 0.058 REF
1.27 BSC 0.050 BSC
SYMBOLS MILLIMETERS INCHES
Life Support Policy:
These products of AME, Inc. are not authorized for use as critical components in life-support
devices or systems, without the express written approval of the president
of AME, Inc.
AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and
advises its customers to obtain the latest version of relevant information.
AME, Inc. , September 2003
Document: 2006-DS8803/8814-G
E-Mail:Longman@rccn.com.cn
Address:Room 2101, No.2 Building Yulan garden, No.50 Puhuitang Rd,Shanghai,PRC
zip:200030
Tel : 86-21-64285731/32 ext:8033 Sales Manager:Longman Xu
Fax: 86-21-64393342