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Advanced Monolithic Systems
FEATURES
* 6 mV (0.5%) max. initial tolerance (A grade) * Operating Current 10A to 20mA * Low Voltage Reference 1.240 * Max. 0.5 Dynamic Impedance (A grade) * Low Temperature Coefficient * SOT-23 Package Available * Low cost
AMS3100-1.2
MICROPOWER VOLTAGE REFERENCE
APPLICATIONS
* Battery Powered Systems * Instrumentation * A/D, D/A Converters * Temperature measurement * Current sources * Notebook/Personal Computer * Monitors/ VCR/ TV * Pagers
GENERAL DESCRIPTION
The AMS3100-1.2 are two-terminal micropower band-gap voltage reference that feature a very low dynamic impedance and good temperature coefficient, operating over a 10A to 20mA current range. AMS3100-1.2 is trimmed at wafer test level to optimize the temperature coefficient and tight output voltage tolerance. The advanced process technology used, makes the AMS3100-1.2 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 AMS3100-1.2 offers the advantage of long term stability at low cost. The AMS3100-1.2 is operating over a -40C to 85C temperature range and is available in the space saving SOT-23 package.
ORDERING INFORMATION:
TOL. PACKAGE TYPE OPERATING TEMPERATURE RANGE -40C to 85C -40C to 85C -40C to 85C
SOT-23 6mV AMS3100-1.2AM 12mV AMS3100-1.2BM 25mV AMS3100-1.2CM
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
AMS3100-1.2
ABSOLUTE MAXIMUM RATINGS (Note 1)
Reverse Current Forward Current Operating Temperature Range Storage temperature 30mA 10mA -40C to 85C -55C to +150C Lead Temperature Vapor phase (60 sec) Infrared (15 sec.) Thermal Resistance (JA) 215C 220C 410C/W
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IR = 100 A, and TA = +25C unless otherwise specified. Parameter Conditions
IR - 100 A IR - 100 A, f =20Hz 10A IR 1mA 1mA IR 20mA 0.2 1.0 5 5 10 15 5 0.50 0.5 1.0 5 10 15 5 0.5 1.0 5 10 15 mV
Min
AMS3100A-1.2 Typ Max
1.235 1.241
Min
AMS3100B-1.2 Typ Max
1.235 1.249
AMS3100C-1.2 Min Typ Max
1.210 1.235 1.260
Units
V
Reverse Breakdown Voltage (Note 3) Reverse Dynamic Impedance (Note 4) 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)
1.229
1.223
A A V
IR - 100 A, 10Hz f 10kHz
60
60
60
25
50
40
100
75
ppm/C
TA=25C.1C T = 1000 Hr
20
20
20
ppm
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 TA = TJ = 25C. 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 TMAX and TMIN, divided by TMAX - TMIN. The measured temperatures are 0C, 25C, 85C.
TYPICAL APPLICATIONS
Wide Input Range Reference Micropower Reference from 9V Battery
9V
Reference from 1.5V Battery
1.5V
V IN = 2.3V TO 30V
500k LM334 1.2V 4.3k AMS3100-1.2 OUT 1.24V AMS3100-1.2
3k 1.2V AMS3100-1.2
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3100-1.2
TYPICAL APPLICATIONS (Continued)
0C - 100C Thermometer Lower Power Thermometer 0C - 100C Thermometer
*
150
M 1.3 TO 1.6V
150
0-100A M IOUT R1 4k R2 1k R AMS3100-1.2 R3 100 R4 220
LM334 AMS3100-1.2
8k TO 12k
0-50A M IOUT R1 2k R2 1k R AMS3100-1.2 R3 50 R4 100
V+ LM334 V-
1.5V (1.3-1.6V)
V+ LM334 V-
1.3-1.6V
* 2N3638 or 2N2907 select for inverse HFE 5 Select for operation at 1.3V IQ 600A to 900 A Calibration
Calibration 1. Short AMS3100-1.2, adjust R3 for IOUT = temp at 1A/K 2. Remove short, adjust R2 for correct reading in C IQ at 1.3V 500 A IQ at 1.6V 2.4mA
1. Short AMS3100-1.2, adjust R3 for IOUT = temp at 1.8A/K 2. Remove short, adjust R2 for correct reading in F
Centigrade Thermometer
Micropower* 10V Reference
IQ VIN = 15V 2.2k V+ LM334 V1.5V R V1 V2 90k 25k 1M 2 + 7 LM4250C 3 1.2k 27k AMS3100-1.2 8 4 22M 150pF 3.5M 6 10V
OUTPUT 1mV/ C 2.3k
R1 1k
AMS3100-1.2 500k
Calibration 1. Adjust R1 so that V1 = temp at 1mV/K. 2. Adjust V2 to 273.2mV. IQ for 1.3V to 1.6V battery voltage = 50A to 150A
*IQ 20A standby current
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3100-1.2
TYPICAL APPLICATIONS (Continued)
Micropower Thermocouple Cold Junction Compensator
V+
LM334 2k 1%
5.1k 1M 1% VMERCURY + CELL 1.345V ZERO ADJ 100k AMS3100-1.2 R
Adjustment Procedure
TC ADJ 500
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 Seebeck coefficient multiplied by 273.2. Thermocouple Type Seebeck Coefficient (mV/ C) 52.3 42.8 40.8 6.4 R1 ( ) R2 Voltage Voltage ( ) Across R1 Across R2 @ 25C (mV) (mV) 1.24k 1k 953 150 15.60 12.77 12.17 1.908 14.32 11.78 11.17 1.766
R2
R1
+ THERMOCOUPLE + COLD JUNCTION ISO THERMAL WITH LM334 METER
J T K S
523 432 408 63.4
Typical supply current 50A
Precision 1 A to 1mA Current Sources
AMS3100-1.2 AMS3100-1.2 30V
C1 150pF R1 100k 2 LM312 3 IOUT* -1.5V TO -27V -30V + 4 IOUT* R2 1.5V TO 27V R2 7 6 3 + C1 150pF 2 LM312 4 7 6
R1 100k
*IOUT =1.23V/R2
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3100-1.2
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Characteristics OUTPUT VOLTAGE CHANGE (mV) 10 8 6
T A =70 C
Reverse Characteristics 100 REVERSE CURRENT (A) FORWARD VOLTAGE (V) 1.2
Forward Characteristics
10
T A =70 C
0.8
4 2 0 -2 0.01 0.1 1 10 100 REVERSE CURRENT (mA)
T A =25 C
1
T A =25 C
0.4
T A =25 C T A =70 C
0.1 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 REVERSE VOLTAGE (V) Temperature Drift of 3 Representative Units 1.260 REFERENCE VOLTAGE (V) DYNAMIC IMPEDANCE ()
IR= 100 A
0 0.01 0.1 1 10 100 FORWARD CURRENT (mA)
Reverse Dynamic Impedance 100 DYNAMIC IMPEDANCE ()
Reverse Dynamic Impedance 10k 1k 100 10
T A =25 C IR= 100 A
1.250
10
T A =70 C
1.240
1
T A =25 C
1.230
1 0.1 10
1.220 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE ( C) Noise Voltage 700
0.1 0.01 0.1 1 10 100 REVERSE CURRENT (mA)
100
10k 100k 1k FREQUENCY (Hz)
1M
Filtered Output Noise 70
I R= 100 A
Response Time 2.0
I R= 100 A
INTEGRATED NOISE ( V)
VOLTAGE SWING (V)
60 50 40 30
AMS3100-1.2 100A
SINGLE POLE LOW PASS
600 NOISE (nV/Hz) 500 400 300 200 100 0
1.5 1.0 0.5 0
OUTPUT INPUT 100k OUTPUT
OUTPUT
~ ~
INPUT
~ ~
20 10 0 100
SHARP CUTOFF FILTER
10
0 10 100 1k 10k FREQUENCY (Hz) 100k 0 200 400 TIME (s) 600
1k 10k 100k CUTOFF FREQUENCY (Hz)
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS3100-1.2
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
3 LEAD SOT-23 PLASTIC PACKAGE (M)
0.110-0.120 (2.794-3.048) 0.015-0.017 (0.381-0.432)
0.083-0.098 (2.108-2.489) 0.047-0.055 (1.194-1.397)
0.035-0.040 (0.889-1.016)
0.018-0.024 (0.457-0.610)
10 NOM
0.035-0.041 (0.089-1.041) 0.0034-0.0050 (0.086-0.127) 0.0005-0.0040 (0.013-0.102) 0.070-0.080 (1.778-2.032) 10 NOM 0.018-0.024 (0.457-0.610)
(SOT-23 ) AMS DRW# 051991
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723

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