ADJUSTABLE MICROPOWER VOLTAGE REFERENCE DIODE RoHS compliant
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AMS285/AMS385
ADJUSTABLE MICROPOWER VOLTAGE REFERENCE DIODE
RoHS compliant
APPLICATIONS
Battery Powered Systems Instrumentation A/D, Converters Temperature measurement Current sources Notebook/Personal Computer Monitors/ VCR/ Pagers Adjustable from 1.24V 5.30V Operating Current 10µA 20mA Initial Tolerance Dynamic Impedance Temperature Coefficient 1.2V Device 2.5V Device also available AMS285-1.2 AMS285-2.5 series, respectively AMS385-1.2 AMS385-2.5 series.
GENERAL DESCRIPTION
AMS285/AMS385 three-terminal micropower band-gap voltage reference diodes. They feature very dynamic impedance good temperature coefficient, operating from 1.24V 5.3V over 10µA 20mA current range. On-chip trimming used provide tight voltage tolerance. Since AMS285/AMS385 band-gap reference, uses only transistors resistors, noise good long-term stability result. Careful design AMS285/AMS385 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/AMS385 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 operational full industrial temperature range -40°C 85°C while AMS385 operating over 70°C temperature range. AMS285/AMS385 available TO-92, SO-8 SOT-89 packages.
ORDERING INFORMATION:
TOL. ±12mV ±25mV ±25mV ±12mV ±25mV ±25mV TO-92 AMS285AN AMS285BN AMS285CN AMS385AN AMS385BN AMS385CN PACKAGE TYPE LEAD SOIC AMS285AS AMS285BS AMS285CS AMS385AS AMS385BS AMS385CS SOT-89 AMS285AL AMS285BL AMS285CL AMS385AL AMS385BL AMS385CL OPERATING TEMPERATURE RANGE
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285/AMS385
ABSOLUTE MAXIMUM RATINGS
Reverse Current Forward Current Operating Temperature Range AMS285 AMS385 30mA 10mA -40°C 85°C 70°C Storage temperature Soldering information Sec) -55°C +150°C 265°C
ELECTRICAL CHARACTERISTICS
Electrical Characteristics +25°C unless otherwise specified. Parameter
Reference Voltage Dynamic Output Impedance
Conditions
=100 =0.1IR, 20Hz VOUT VREF VOUT 5.3V 10µA 20mA VOUT VREF VOUT 5.3V 10Hz 10kHz VOUT VREF VOUT 5.3V
1.228
AMS285A
1.240 1.252
1.215
AMS285B
1.240 1.265
1.215
AMS285C
1.240 1.265
Units
Reference Voltage Change with Current Min. Operating Current (Note Wide Band Noise (Note
µVrms µVrms ppm/°C
Temperature Coeff. (Note Long Term Stability (Note TA=25°C±.1°C 1000
ELECTRICAL CHARACTERISTICS
Electrical Characteristics +25°C unless otherwise specified. Parameter
Reference Voltage Dynamic Output Impedance
Conditions
=100 =0.1IR, 20Hz VOUT VREF VOUT 5.3V 10µA 20mA VOUT VREF VOUT 5.3V 10Hz 10kHz VOUT VREF VOUT 5.3V
1.228
AMS285A
1.240 1.252
1.215
AMS285B
1.240 1.265
1.215
AMS285C
1.240 1.265
Units
Reference Voltage Change with Current Min. Operating Current (Note Wide Band Noise (Note
µVrms µVrms ppm/°C
Temperature Coeff. (Note Long Term Stability (Note TA=25°C±.1°C 1000
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285/AMS385
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
1.2V Reference
500k 1.2V AMS385
5.0V Reference
Precision Reference
VOUT AMS385 68.1k 301k
VOUT 1.24
AMS385
120k
364k
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285/AMS385
TYPICAL APPLICATIONS (Continued)
Noise Reference
100k VOUT AMS385 0.47µF 10µF 120k
Current Source
+15V
AMS385
2N2905 2N3964 120k
360k
1.24V IOUT
Current Shunt Regulator
200mA Shunt Regulator
VOUT 120k 2.4M
VOUT 2.5V
AMS385 2N2219
120k
AMS385 2N5115
120k
Voltage Level Detector
Voltage Level Detector
AMS385
120k
AMS385
120k
-12V
-12V
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285/AMS385
TYPICAL APPLICATIONS (Continued)
Bidirectional Clamp 2.4V
VOUT 1N457
Bidirectional Adjustable Clamp 1.8V 2.4V
VOUT 1N457
Bidirectional Adjustable Clamp 2.4V
VOUT AMS385 330k 330k 1N457 AMS385
AMS385 1N457
510k 510k
510k AMS385 1N457 510k 390k
AMS385
AMS385
1N457
TYPICAL PERFORMANCE CHARACTERISTICS
REFERENCE VOLTAGE CHANGE (mV)
REFERENCE VOLTAGE CHANGE (mV)
AMS285 Typical Temperature Coefficient
AMS385 Typical Temperature Coefficient
TEMPCO
TEMPERATURE
TEMPERATURE
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285/AMS385
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
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° =125°
=25°
REVERSE VOLTAGE Feedback Current 0.01
Temperature Drift Representative Units 1.260 FEEDBACK CURRENT (nA) REFERENCE VOLTAGE
100µA
Minimum Operating Current
100µA
1.250
MINIMUM CURRENT
AMS385 WORST CASE
1.240
VOUT VREF
VOUT 5.3V
1.230
TEMPERATURE Output Noise Voltage
1.220 TEMPERATURE Dynamic Output Impedance
OUTPUT VOLTAGE Response Time
10,000
100µA 0.1IR =25° VOUT VREF 100µA VOUT 5.3V
OUTPUT IMPEDANCE
OUTPUT INPUT OUTPUT 120k AMS385 364k
NOISE (nV/Hz)
1,000
VOUT VREF
VOUT 5.3V
VOLTAGE
INPUT
FREQUENCY (Hz) 100k
FREQUENCY (Hz) 100k
TIME (µs)
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
(925) 443-0723
AMS285/AMS385
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/AMS385
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
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