AMS285-1.2BS中文资料

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
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