Advanced
Monolithic
Systems
AMS285-1.2/AMS385-1.2
MICROPOWER VOLTAGE REFERENCE DIODE
FEATURES
APPLICATIONS
· ±4 mV (±0.3%) max. initial tolerance (A grade)
· Operating Current 10mA to 20mA
· Battery Powered Systems
· Instrumentation
· Low Voltage Reference 1.235
· Max. 0.6W Dynamic Impedance (A grade)
· Low Temperature Coefficient
· A/D, D/A Converters
· Temperature measurement
· Current sources
· 2.5V Device and Adjustable Device also available
AMS285-2.5 and AMS285 series, respectively
AMS385-2.5 and AMS385 series.
· 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 low
dynamic impedance and good temperature coefficient, operating over a 10µA to 20mA current range. On-chip trimming is
used to provide tight voltage tolerance. Since the AMS285-1.2/AMS385-1.2 is a band-gap reference, uses only transistors and
resistors, low noise and good long-term stability result. Careful design of the AMS285-1.2/AMS385-1.2 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
AMS285-1.2/AMS385-1.2 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 AMS285-1.2 is operational in the full industrial temperature range of -40°C to 85°C while AMS385-1.2 is operating
over 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.
PACKAGE TYPE
OPERATING
TEMPERATURE RANGE
TO-92
8 LEAD SOIC
AMS285-1.2AS
AMS285-1.2BS
AMS285-1.2CS
AMS385-1.2AS
AMS385-1.2BS
AMS385-1.2CS
SOT-89
AMS285-1.2AL
AMS285-1.2BL
AMS285-1.2CL
AMS385-1.2AL
AMS385-1.2BL
AMS385-1.2CL
±4mV AMS285-1.2AN
±12mV AMS285-1.2BN
±25mV AMS285-1.2CN
±4mV AMS385-1.2AN
±12mV AMS385-1.2BN
±25mV AMS385-1.2CN
-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
ADMOS [ ADVANCED MONOLITHIC SYSTEMS ]
