Advanced
Monolithic
Systems
AMS285-2.5/AMS385-2.5
MICROPOWER VOLTAGE REFERENCE DIODE
RoHS compliant
FEATURES
APPLICATIONS
• ±20 mV (±0.8%) max. initial tolerance (A grade)
• Operating Current 20µA to 20mA
• Low Voltage Reference 2.5V
• Max. 0.6Ω Dynamic Impedance (A grade)
• Low Temperature Coefficient
• Battery Powered Systems
• Instrumentation
• A/D, D/A Converters
• Temperature measurement
• Current sources
• 1.2V Device and Adjustable Device also available
AMS285-1.2 and AMS285 series, respectively
AMS385-1.2 and AMS385 series.
• Notebook/Personal Computer
• Monitors/ VCR/ TV
• Pagers
GENERAL DESCRIPTION
The AMS285-2.5/AMS385-2.5 are two-terminal micropower band-gap voltage reference diodes. They feature a very low
dynamic impedance and good temperature coefficient, operating over a 20µA to 20mA current range. On-chip trimming is
used to provide tight voltage tolerance. Since the AMS285-2.5/AMS385-2.5 is a band-gap reference, uses only transistors and
resistors, low noise and good long term stability result. Careful design of the AMS285-2.5/AMS385-2.5 has made the device
exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic
operating range allows its use with widely varying supplies with excellent regulation. The extremely low power drain of the
AMS285-2.5/AMS385-2.5 makes these reference diodes useful for micropower circuitry. These voltage references can be used
to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Further more,
the wide operating current allows it to replace older references with a tight tolerance part.
The AMS285-2.5 is operational in the full industrial temperature range of -40°C to 85°C while AMS385-2.5 is operating over
a 0°C to 70°C temperature range. The AMS285-2.5/AMS385-2.5 are available in TO-92, SO-8 and SOT-89 packages.
ORDERING INFORMATION:
TOL.
PACKAGE TYPE
OPERATING
TO-92
8 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
TEMPERATURE RANGE
±20mV AMS285-2.5AN
±38mV AMS285-2.5BN
±75mV AMS285-2.5CN
±20mV AMS385-2.5AN
±38mV AMS385-2.5BN
±75mV AMS385-2.5CN
-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. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723