The AMS3100-2.5 are two-terminal micropower band-gap voltage reference that feature a very low dynamic impedance and
good temperature coefficient, operating over a 20µA to 20mA current range. AMS3100-2.5 is trimmed at wafer test level to
optimize the temperature coefficient and tight output voltage tolerance. The advanced process technology used, makes the
AMS3100-2.5 exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide
dynamic operating range allows its use with widely varying supplies with excellent regulation. The extremely low power drain,
makes these reference diodes useful for micropower circuitry. These voltage references can be used to make portable meters,
regulators or general purpose analog circuitry with battery life approaching shelf life. Further more, the wide operating current
allows it to replace older references with a tight tolerance part. Pin to pin compatible with other standard industry references,
the AMS3100-2.5 offers the advantage of long term stability at low cost.
The AMS3100-2.5 is operating over a -40°C to 85°C temperature range and is available in the space saving SOT-23 package.
ORDERING INFORMATION
:
TOL.
PACKAGE TYPE
OPERATING
TEMPERATURE RANGE
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
SOT-23
±12mV
AMS3100-2.5AM
±25mV
AMS3100-2.5BM
±50mV
AMS3100-2.5CM
PIN CONNECTIONS
3L SOT-23
(M)
3 *
1
+
2
-
*This pin must be left floating or
connected to pin 2
Top View
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3100-2.5
ABSOLUTE MAXIMUM RATINGS
Reverse Current
Forward Current
Operating Temperature Range
Storage temperature
30mA
10mA
-40°C to 85°C
-55°C to +150°C
Lead Temperature ( 25 Sec)
265°C
Thermal Resistance (θ
JA
)
410°C/W
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at I
R
= 100
µA,
and T
A
= +25°C unless otherwise specified.
Parameter
Reverse Breakdown
Voltage (Note 3)
Reverse Dynamic
Impedance (Note 3)
Reverse Breakdown
Voltage Change with
current (Note 3)
Min. Operating
Current (Note 3)
Wide Band Noise
(Note 4)
Temperature Coeff.
(Note 5)
Long Term Stability
(Note 4)
T
A
=25°C±.1°C
T = 1000 Hr
20
20
20
ppm
I
R
- 100
µA,
10Hz
≤
f
≤
10kHz
Conditions
I
R
- 100
µA
I
R
- 100
µA,
f =20Hz
10µA
≤I
R
≤1mA
1mA
≤I
R
≤20mA
AMS3100A-2.5
Min
Typ
Max
2.488
2.500
0.2
1.0
10
12
20
25
2.512
0.60
AMS3100B-2.5
Min
Typ
Max
2.475
2.500
1
1.0
10
13
20
30
2.525
AMS3100C-2.5
Min
Typ
Max
2.450
2.500
1
2.0
20
13
20
30
2.550
Units
V
Ω
mV
µA
µA
µV
120
120
120
25
50
100
150
ppm/°C
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the
device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical
Characteristics
.
The guaranteed specifications apply only for the test conditions listed.
Note 2:
Parameters identified with
boldface type
apply at temperature extremes. All other numbers apply at T
A
= T
J
= 25°C.
Note 3:
Guaranteed and 100% production tested
Note 4:
. Guaranteed but not 100% production tested. These limits are not used to calculate average outgoing quality levels.
Note 5:
The average temperature coefficient is defined as the maximum deviation of reference voltage at all measured temperatures between the operating
T
MAX and
T
MIN
, divided by T
MAX
- T
MIN
. The measured temperatures are -40°C, 25°C and 85°C.
TYPICAL APPLICATIONS
Wide Input
Range Reference
Micropower Reference
from 9V Battery
9V
V
IN
= 3.7V TO 30V
200k
LM334
2.5V
3.3k
AMS3100-2.5
OUT
2.5V
AMS3100-2.5
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3100-2.5
TYPICAL APPLICATIONS
(Continued)
0°C - 100°C Thermometer
0°C - 100°C Thermometer
1k
150
0-100µA M
I
OUT
R1
8k
R2
1k
R
AMS3100-2.5
R3
100
R4
220
0-50µA M
I
OUT
R1
4k
R2
1k
R
AMS3100-2.5
R3
50
R4
100
V
+
LM334
V
-
3V
V
+
LM334
V
-
3V
Calibration
1. Short AMS3100-2.5, adjust R3 for I
OUT
= temp at 1µA/°K
2. Remove short, adjust R2 for correct reading in
°C
Calibration
1. Short AMS3100-2.5, adjust R3 for I
OUT
= temp at 1.8µA/°K
2. Remove short, adjust R2 for correct reading in
°F
Micropower* 5V Regulator
I
Q
V
+
LM334
V
-
R
2.2k
3
+
7
LM4250C
2
-
4
6
V
O
= 5V
I
L
≤
100mA
150pF
100k
+
4.7µF
TANTALUM
47k
2N2905
V
IN
≥
5.2V
Micropower* 10V Reference
I
Q
V
IN
= 15V
500k
2
+
7
LM4250C
3
8
-
4
22M
150pF
1.5M
6
10V
8 1N457
1N457
500k
AMS3100-2.5
10M
AMS3100-2.5
2k
100k
*I
Q
≅
20µA standby current
*I
Q
≅
40µA
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3100-2.5
TYPICAL APPLICATIONS
(Continued)
Micropower Thermocouple Cold Junction Compensator
V
+
LM334
2k
1%
18k
1M
1%
V
-
R
Adjustment Procedure
3V +
LITHIUM
ZERO
ADJ 100k
TC ADJ
500
AMS3100-2.5
R2
1. Adjust TC ADJ pot until voltage across R1 equals Kelvin temperature
multiplied by the thermocouple Seebeck coefficient.
2. Adjust ZERO ADJ pot until voltage across R2 equals the thermocouple
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