Advanced
Monolithic
Systems
FEATURES
•
±4
mV (±0.3%) max. initial tolerance (A grade)
•
Operating Current 10µA to 20mA
µ
•
Low Voltage Reference 1.235
•
Max. 0.6Ω Dynamic Impedance (A grade)
Ω
•
Low Temperature Coefficient
•
2.5V Device and Adjustable Device also available
AMS285-2.5 and AMS285 series, respectively
AMS385-2.5 and AMS385 series.
AMS285-1.2/AMS385-1.2
MICROPOWER VOLTAGE REFERENCE DIODE
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 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.
±4mV
±12mV
±25mV
±4mV
±12mV
±25mV
TO-92
AMS285-1.2AN
AMS285-1.2BN
AMS285-1.2CN
AMS385-1.2AN
AMS385-1.2BN
AMS385-1.2CN
PACKAGE TYPE
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
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
ADMOS [ ADVANCED MONOLITHIC SYSTEMS ]
