Advanced AMS285-1.2/AMS385-1.2 Monolithic MICROPOWER VOLTAGE REFERENCE DIODE Systems
FEATURES
±4 mV (±0.3%) max. initial tolerance (A grade) Operating Current 10µA to 20mA Low Voltage Reference 1.235
Max. 0.6 Dynamic Impedance (A grade) Low Temperature Coefficient
2.5V Device and Adjustable Device also available AMS285-2.5 and AMS285 series, respectively AMS385-2.5 and AMS385 series.
APPLICATIONS
Battery Powered Systems Instrumentation
A/D, D/A Converters
Temperature measurement Current sources
Notebook/Personal Computer Monitors/ VCR/ TV Pagers
GENERAL DESCRIPTION
The AMS285-1.2/AMS385-1.2 are two-terminal micropower band-gap voltage reference diodes. They feature a very lowdynamic impedance and good temperature coefficient, operating over a 10µA to 20mA current range. On-chip trimming isused to provide tight voltage tolerance. Since the AMS285-1.2/AMS385-1.2 is a band-gap reference, uses only transistors andresistors, low noise and good long-term stability result. Careful design of the AMS285-1.2/AMS385-1.2 has made the deviceexceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamicoperating range allows its use with widely varying supplies with excellent regulation. The extremely low power drain of theAMS285-1.2/AMS385-1.2 makes these reference diodes useful for micropower circuitry. These voltage references can beused to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Furthermore, the wide operating current allows it to replace older references with a tight tolerance part.
The AMS285-1.2 is operational in the full industrial temperature range of -40°C to 85°C while AMS385-1.2 is operatingover a 0°C to 70°C temperature range. The AMS285-1.2/AMS385-1.2 are available in TO-92, SO-8 and SOT-89 packages.
ORDERING INFORMATION:
TOL.±4mV ±12mV ±25mV±4mV ±12mV ±25mV
TO-92
PACKAGE TYPE8 LEAD SOICSOT-89
OPERATING
TEMPERATURE RANGE
-40 to 85° C-40 to 85° C-40 to 85° C 0 to 70° C 0 to 70° C 0 to 70° C
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS285-1.2/AMS385-1.2
ABSOLUTE MAXIMUM RATINGS
Reverse CurrentForward Current
Operating Temperature Range AMS285-1.2 AMS385-1.2
30mA 10mA-40°C to 85°C 0°C to 70°C
Storage temperatureSoldering information TO-92 package: 10 sec.
SOIC package: Vapor phase (60 sec) Infrared (15 sec.) SOT-89 package: 10 sec.
-55°C to +150°C 260°C 215°C 220°C 265°C
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IR = 100 µA, and TA = +25°C unless otherwise specified.Parameter
Reverse BreakdownVoltage (Note 4)Reverse DynamicImpedance (Note 4)Reverse BreakdownVoltage Change withcurrent (Note 4)Min. OperatingCurrent (Note 4)Wide Band Noise(Note 5)
Temperature Coeff.(Note 6)
Long Term Stability(Note 5)
TA=25°C±.1°CT = 1000 HrIR - 100 µA,
10Hz ≤ f ≤ 10kHz
Conditions
IR - 100 µAIR - 100 µA, f =20Hz10µA ≤IR ≤1mA 1mA ≤IR ≤20mA
AMS285A-1.2Min Typ Max
1.231
1.2350.21.010860
10201.2390.60
AMS285B-1.2
Min Typ Max
1.223
1.2351
1.010
860
10201.247
AMS285C-1.2Min Typ Max
1.205
1.2351
1.020
860
15251.260
Units
V mV
µAµAµV
2550100150ppm/°C
202020ppm
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IR = 100 µA, and TA = +25°C unless otherwise specified.Parameter
Reverse BreakdownVoltage (Note 4)Reverse DynamicImpedance (Note 4)Reverse BreakdownVoltage Change withCurrent (Note 4)Min. OperatingCurrent (Note 4)Wide Band Noise(Note 5)
Temperature Coeff.(Note 6)
Long Term Stability(Note 5)
TA=25°C±.1°CT = 1000 HrIR - 100 µA,
10Hz ≤ f ≤ 10kHz
Conditions
IR - 100 µAIR - 100 µA, f =20Hz10µA ≤IR ≤1mA1mA ≤IR ≤20mA
AMS385A-1.2Min Typ Max
1.231
1.2350.21.010860
10201.2390.60
AMS385B-1.2
Min Typ Max
1.223
1.2351
1.020
860
10201.247
AMS385C-1.2Min Typ Max
1.205
1.2351
1.020
860
15251.260
Units
V mV
µAµAµV
2550100150ppm/°C
202020ppm
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS285-1.2/AMS385-1.2
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. Theguaranteed specifications apply only for the test conditions listed.Note 2: For elevated temperature operation, Tj max is: AMS285 AMS385
+125°C+100°C
Thermal Resistance TO-92 SO-8
165°C/W
SOT-89
160°C/W
JA (junction to ambient)170°C/W (0.125” leads)
Note 3: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at TA = TJ = 25 …… 此处隐藏:5399字,全部文档内容请下载后查看。喜欢就下载吧 ……