AMS9491_1 Datasheet, PDF (1/7 Pages) Advanced Monolithic Systems – 1.235V VOLTAGE REFERENCE

Advanced
Monolithic
Systems
FEATURES
• ±10 mV max. initial tolerance (A grade)
• Operating Current 10µA to 20mA
• Low Voltage Reference 1.235
• Max. 0.6Ω Dynamic Impedance (A grade)
• Low Temperature Coefficient
AMS9491
1.235V VOLTAGE REFERENCE
RoHS compliant
APPLICATIONS
• Battery Powered Systems
• Instrumentation
• A/D, D/A Converters
• Temperature measurement
• Current sources
• Pagers
GENERAL DESCRIPTION
The AMS9491 is a two-terminal micropower band-gap voltage reference diode. It 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 AMS9491 is a band-gap reference, uses only transistors and resistors, low noise and good long-term
stability result. Careful design of the AMS9491 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 AMS9491 makes this reference diode useful for micropower
circuitry.
The AMS9491 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 AMS9491 is operating over a 0°C to 70°C temperature range and is available in TO-92 and SO-8 packages.
ORDERING INFORMATION:
TOL.
PACKAGE TYPE
TO-92
±10mV AMS9491AN
±20mV AMS9491BN
8 LEAD SOIC
AMS9491AS
AMS9491BS
OPERATING
TEMPERATURE RANGE
0 to 70° C
0 to 70° C
PIN CONNECTIONS
TO-92
Plastic Package (N)
3
1
8L SOIC
SO Package (S)
+ ^{N/C N/C N/C}
8765
Bottom View
1234
N/C N/C N/C ^-
Top View
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