AMS285-1.2/AMS385-1.2 MICROPOWER VOLTAGE REFERENCE DIODE APP

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AMS285-1.2/AMS385-1.2 MICROPOWER VOLTAGE REFERENCE DIODE APP

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(±0.3%) max. initial tolerance grade) Operating Current 10µA 20mA Voltage Reference 1.235 Max. Dynamic Impedance grade) Temperature Coefficient 2.5V Device Adjustable Device also available AMS285-2.5 AMS285 series, respectively AMS385-2.5 AMS385 series.
AMS285-1.2/AMS385-1.2
MICROPOWER VOLTAGE REFERENCE DIODE
APPLICATIONS
Battery Powered Systems Instrumentation A/D, Converters Temperature measurement Current sources Notebook/Personal Computer Monitors/ VCR/ Pagers
GENERAL DESCRIPTION
AMS285-1.2/AMS385-1.2 two-terminal micropower band-gap voltage reference diodes. They feature very dynamic impedance good temperature coefficient, operating over 10µA 20mA current range. On-chip trimming used provide tight voltage tolerance. Since AMS285-1.2/AMS385-1.2 band-gap reference, uses only transistors resistors, noise good long-term stability result. Careful design AMS285-1.2/AMS385-1.2 made device exceptionally tolerant capacitive loading, making easy almost reference application. wide dynamic operating range allows with widely varying supplies with excellent regulation. extremely power drain AMS285-1.2/AMS385-1.2 makes these reference diodes useful micropower circuitry. These voltage references used make portable meters, regulators general purpose analog circuitry with battery life approaching shelf life. Further more, wide operating current allows replace older references with tight tolerance part. AMS285-1.2 operational full industrial temperature range -40°C 85°C while AMS385-1.2 operating over 70°C temperature range. AMS285-1.2/AMS385-1.2 available TO-92, SO-8 SOT-89 packages.
ORDERING INFORMATION:
TOL. ±4mV ±12mV ±25mV ±4mV ±12mV ±25mV TO-92 AMS285-1.2AN AMS285-1.2BN AMS285-1.2CN AMS385-1.2AN AMS385-1.2BN AMS385-1.2CN PACKAGE TYPE LEAD SOIC AMS285-1.2AS AMS285-1.2BS AMS285-1.2CS AMS385-1.2AS AMS385-1.2BS AMS385-1.2CS SOT-89 AMS285-1.2AL AMS285-1.2BL AMS285-1.2CL AMS385-1.2AL AMS385-1.2BL AMS385-1.2CL OPERATING TEMPERATURE RANGE
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-1.2/AMS385-1.2
ABSOLUTE MAXIMUM RATINGS
Reverse Current Forward Current Operating Temperature Range AMS285-1.2 AMS385-1.2 30mA 10mA -40°C 85°C 70°C Storage temperature Soldering information TO-92 package: sec. SOIC package: Vapor phase sec) Infrared sec.) SOT-89 package: sec. -55°C +150°C 260°C 215°C 220°C 265°C
ELECTRICAL CHARACTERISTICS
Electrical Characteristics +25°C unless otherwise specified. Parameter
Reverse Breakdown Voltage (Note Reverse Dynamic Impedance (Note Reverse Breakdown Voltage Change with current (Note Min. Operating Current (Note Wide Band Noise (Note Temperature Coeff. (Note Long Term Stability (Note TA=25°C±.1°C 1000 10Hz 10kHz
Conditions
=20Hz 10µA 20mA
AMS285A-1.2
1.235 1.239 0.60
1.223
AMS285B-1.2
1.235 1.247
AMS285C-1.2
1.235 1.260
Units
1.231
1.205
ppm/°C
ELECTRICAL CHARACTERISTICS
Electrical Characteristics +25°C unless otherwise specified. Parameter Conditions
=20Hz 10µA 20mA 0.60
AMS385A-1.2
1.235 1.239
AMS385B-1.2
1.235 1.247
AMS385C-1.2
1.235 1.260
Units
Reverse Breakdown Voltage (Note Reverse Dynamic Impedance (Note Reverse Breakdown Voltage Change with Current (Note Min. Operating Current (Note Wide Band Noise (Note Temperature Coeff. (Note Long Term Stability (Note
1.231
1.223
1.205
10Hz 10kHz
ppm/°C
TA=25°C±.1°C 1000
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-1.2/AMS385-1.2
Note Absolute Maximum Ratings indicate limits beyond which damage device occur. Operating Ratings indicate conditions which device
intended functional, guarantee specific performance limits. guaranteed specifications test conditions, Electrical Characteristics. guaranteed specifications apply only test conditions listed. Note elevated temperature operation, AMS285 AMS385 +125°C +100°C
Thermal Resistance
TO-92
170°C/W (0.125" leads)
SO-8
165°C/W
SOT-89
160°C/W
(junction ambient)
Note Parameters identified with boldface type apply temperature extremes. other numbers apply 25°C. Note Guaranteed 100% production tested. Note Guaranteed 100% production tested. These limits used calculate average outgoing quality levels. Note average temperature coefficient defined maximum deviation reference voltage measured temperatures between operating TMAX
TMIN, divided TMAX TMIN. measured temperatures 0°C, 25°C, 70°C, 85°C.
CONNECTIONS
TO-92 Plastic Package SOIC Package
SOT-89
Bottom View
View
View
TYPICAL APPLICATIONS
Wide Input Range Reference Micropower Reference from Battery Reference from 1.5V Battery
2.3V
1.5V
500k LM334 1.2V 4.3k AMS385-1.2 1.24V AMS385-1.2
1.2V AMS385-1.2
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-1.2/AMS385-1.2
TYPICAL APPLICATIONS (Continued)
100°C Thermometer Lower Power Thermometer 100°C Thermometer
1.6V
0-100µA IOUT AMS385-1.2
LM334 AMS385-1.2
0-50µA IOUT
AMS385-1.2
LM334
1.5V (1.3-1.6V)
LM334
1.3-1.6V
2N3638 2N2907 select inverse Select operation 1.3V 600µA
Calibration Short AMS385-1.2, adjust IOUT temp 1µA/°K Remove short, adjust correct reading 1.3V 1.6V 2.4mA
Calibration Short AMS385-1.2, adjust IOUT temp 1.8µA/°K Remove short, adjust correct reading
Centigrade Thermometer
Micropower* Reference
2.2k LM334 V1.5V 2.3k LM4250C 1.2k AMS385-1.2 150pF 3.5M
OUTPUT 1mV/°
AMS385-1.2
500k
Calibration Adjust that temp 1mV/°K. Adjust 273.2mV. 1.3V 1.6V battery voltage 50µA 150µA
20µA standby current
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-1.2/AMS385-1.2
TYPICAL APPLICATIONS (Continued)
Micropower Thermocouple Cold Junction Compensator
LM334
5.1k
Adjustment Procedure
MERCURY CELL 1.345V AMS385-1.2
ZERO 100k
Adjust until voltage across equals Kelvin temperature multiplied thermocouple Seebeck coefficient. Adjust ZERO until voltage across equals thermocouple Seebeck coefficient multiplied 273.2. Thermocouple Type Seebeck Coefficient (mV/ 52.3 42.8 40.8 Voltage Voltage Across Across 25°C (mV) (mV) 1.24k 15.60 12.77 12.17 1.908 14.32 11.78 11.17 1.766
THERMOCOUPLE COLD JUNCTION THERMAL WITH LM334 METER
63.4
Typical supply current 50µA
Precision Current Sources
AMS385-1.2 AMS385-1.2
150pF 100k LM312 IOUT* -1.5V -27V -30V IOUT* 1.5V 150pF LM312
100k
*IOUT =1.23V/R2
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-1.2/AMS385-1.2
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Characteristics OUTPUT VOLTAGE CHANGE (mV) 0.01 REVERSE CURRENT (mA)
=25° =-55°
Reverse Characteristics REVERSE CURRENT (µA) FORWARD VOLTAGE
Forward Characteristics
=125°
=-55°
=125° =-55°
=25°
=25° =125°
REVERSE VOLTAGE Temperature Drift Representative Units 1.260 DYNAMIC IMPEDANCE REFERENCE VOLTAGE
0.01 FORWARD CURRENT (mA)
Reverse Dynamic Impedance DYNAMIC IMPEDANCE
Reverse Dynamic Impedance
=25°
1.250
=125°
1.240
=-55°
=25°
1.230
1.220 TEMPERATURE Noise Voltage
0.01 REVERSE CURRENT (mA)
100k FREQUENCY (Hz)
Filtered Output Noise
Response Time
INTEGRATED NOISE (µV)
AMS385-1.2 100µA
VOLTAGE SWING
SINGLE POLE PASS
NOISE (nV/Hz)
OUTPUT INPUT 100k OUTPUT
OUTPUT
INPUT
SHARP CUTOFF FILTER
FREQUENCY (Hz) 100k TIME (µs)
100k CUTOFF FREQUENCY (Hz)
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-1.2/AMS385-1.2
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
LEAD TO-92 PLASTIC PACKAGE
0.060±0.005 (1.524±0.127)
0.180±0.005 (4.572±0.127) 0.060±0.010 (1.524±0.254) 0.140±0.010 (3.556±0.127)
0.180±0.005 (4.572±0.127)
0.90 (2.286)
0.500 (12.70)
0.050 (1.270)
UNCONTROLLED LEAD DIMENSIONS
0.050±0.005 (1.270±0.127)
0.016±0.003 (0.406±0.076)
0.015±0.002 (0.381±0.051)
(TO-92 DRW# 042391
LEAD SOIC PLASTIC PACKAGE
0.189-0.197* (4.801-5.004)
0.228-0.244 (5.791-6.197)
0.150-0.157** (3.810-3.988)
0.053-0.069 (1.346-1.752) 0.004-0.010 (0.101-0.254) 0.008-0.010 (0.203-0.254)
0.010-0.020 (0.254-0.508) 0°-8°
0.014-0.019 (0.355-0.483)
0.050 (1.270)
0.016-0.050 (0.406-1.270)
(SO-8 DRW# 042293
*DIMENSION DOES INCLUDE MOLD FLASH. MOLD FLASH SHALL EXCEED 0.006" (0.152mm) SIDE **DIMENSION DOES INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL EXCEED 0.010" (0.254mm) SIDE
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-1.2/AMS385-1.2
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued).
SOT-89 PLASTIC PACKAGE
0.173-0.181 (4.40-4.60) 0.064-0.072 (1.62-1.83)
0.055-0.063 (1.40-1.60) 0.014-0.017 (0.35-0.44)
0.155-0.167 (3.94-4.25) 0.090-0.102 (2.29-2.60) 0.084-0.090 (2.13-2.29)
0.035-0.047 (0.89-1.20) 0.059 (1.50) 0.118 (3.00) 0.014-0.019 (0.36-0.48) 0.017-0.022 (0.44-0.56)
(SOT-89 DRW# 042392
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723

AMS285-1.2/AMS385-1.2 MICROPOWER VOLTAGE REFERENCE DIODE APP

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