AMS285-2.5/AMS385-2.5 MICROPOWER VOLTAGE REFERENCE DIODE APP

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AMS285-2.5/AMS385-2.5 MICROPOWER VOLTAGE REFERENCE DIODE APP

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(±0.8%) max. initial tolerance grade) Operating Current 20µA 20mA Voltage Reference 2.5V Max. Dynamic Impedance grade) Temperature Coefficient 1.2V Device Adjustable Device also available AMS285-1.2 AMS285 series, respectively AMS385-1.2 AMS385 series.
AMS285-2.5/AMS385-2.5
MICROPOWER VOLTAGE REFERENCE DIODE
APPLICATIONS
Battery Powered Systems Instrumentation A/D, Converters Temperature measurement Current sources Notebook/Personal Computer Monitors/ VCR/ Pagers
GENERAL DESCRIPTION
AMS285-2.5/AMS385-2.5 two-terminal micropower band-gap voltage reference diodes. They feature very dynamic impedance good temperature coefficient, operating over 20µA 20mA current range. On-chip trimming used provide tight voltage tolerance. Since AMS285-2.5/AMS385-2.5 band-gap reference, uses only transistors resistors, noise good long term stability result. Careful design AMS285-2.5/AMS385-2.5 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 AMS285-2.5/AMS385-2.5 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. AMS285-2.5 operational full industrial temperature range -40°C 85°C while AMS385-2.5 operating over 70°C temperature range. AMS285-2.5/AMS385-2.5 available TO-92, SO-8 SOT-89 packages.
ORDERING INFORMATION:
TOL. ±20mV ±38mV ±75mV ±20mV ±38mV ±75mV TO-92 AMS285-2.5AN AMS285-2.5BN AMS285-2.5CN AMS385-2.5AN AMS385-2.5BN AMS385-2.5CN PACKAGE TYPE LEAD SOIC AMS285-2.5AS AMS285-2.5BS AMS285-2.5CS AMS385-2.5AS AMS385-2.5BS AMS385-2.5CS SOT-89 AMS285-2.5AL AMS285-2.5BL AMS285-2.5CL AMS385-2.5AL AMS385-2.5BL AMS385-2.5CL OPERATING TEMPERATURE RANGE
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-2.5/AMS385-2.5
ABSOLUTE MAXIMUM RATINGS
Reverse Current Forward Current Operating Temperature Range AMS285-2.5 AMS385-2.5 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-2.5
2.500 2.520 0.60
2.462
AMS285B-2.5
2.500 2.538
AMS285C-2.5
2.500 2.575
Units
2.480
2.425
ppm/°C
ELECTRICAL CHARACTERISTICS
Electrical Characteristics +25°C unless otherwise specified. Parameter Conditions
=20Hz 10µA 20mA 0.60
AMS385A-2.5
2.500 2.520
AMS385B-2.5
2.500 2.538
AMS385C-2.5
2.500 2.575
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
2.480
2.462
2.425
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
AMS285-2.5/AMS385-2.5
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
(junction ambient)
TO-92
170°C/W (0.125" leads)
SO-8
165°C/W
SOT-89
160°C/W
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
3.7V
200k LM334 2.5V 3.3k AMS385-2.5 2.5V AMS385-2.5
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-2.5/AMS385-2.5
TYPICAL APPLICATIONS (Continued)
100°C Thermometer 100°C Thermometer
0-100µA IOUT AMS385-2.5
0-50µA IOUT
AMS385-2.5
LM334
LM334
Calibration Short AMS385-2.5, adjust IOUT temp 1µA/°K Remove short, adjust correct reading
Calibration Short AMS385-2.5, adjust IOUT temp 1.8µA/°K Remove short, adjust correct reading
Micropower* Regulator
LM334 2.2k LM4250C 100mA 150pF 100k 4.7µF TANTALUM AMS385-2.5 AMS385-2.5 100k 2N2905 5.2V
Micropower* Reference
500k LM4250C 150pF 1.5M
1N457 1N457
500k
40µA
20µA standby current
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-2.5/AMS385-2.5
TYPICAL APPLICATIONS (Continued)
Micropower Thermocouple Cold Junction Compensator
LM334
Adjustment Procedure
LITHIUM AMS385-2.5
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
AMS385-2.5 AMS385-2.5
150pF LM312 IOUT* -1.5V -27V -30V IOUT* 1.5V 150pF LM312
*IOUT =2.5V/R2
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-2.5/AMS385-2.5
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Characteristics OUTPUT VOLTAGE CHANGE (mV) 0.01 REVERSE CURRENT (mA)
=-55°
Reverse Characteristics REVERSE CURRENT (µA) FORWARD VOLTAGE
Forward Characteristics
=125°
=-55°
=25°
=125° =-55°
=25°
=25°
=125°
REVERSE VOLTAGE Temperature Drift 2.530 DYNAMIC IMPEDANCE REFERENCE VOLTAGE 2.520 2.510 2.500 2.490 2.480 2.470 2.460 2.450 TEMPERATURE Noise Voltage 1400
SINGLE POLE PASS
0.01 FORWARD CURRENT (mA)
Reverse Dynamic Impedance 1000 DYNAMIC IMPEDANCE
Reverse Dynamic Impedance
=25°
=125°
=-55°
=25°
0.01 REVERSE CURRENT (mA)
100k FREQUENCY (Hz)
Filtered Output Noise INTEGRATED NOISE (µV)
SHARP CUTOFF FILTER OUTPUT
Response Time
OUTPUT
1200 NOISE (nV/Hz)
100µA
1000 FREQUENCY (Hz) 100k
VOLTAGE SWING
INPUT 100k OUTPUT
AMS385-2.5
INPUT
100k CUTOFF FREQUENCY (Hz)
TIME (µs)
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285-2.5/AMS385-2.5
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
AMS285-2.5/AMS385-2.5
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

AMS285-2.5/AMS385-2.5 MICROPOWER VOLTAGE REFERENCE DIODE APP

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