器件名称: AMS9491
功能描述: 1.235V VOLTAGE REFERENCE
文件大小: 75.54KB 共7页
简 介:Advanced Monolithic Systems
FEATURES
±10 mV max. initial tolerance (A grade) Operating Current 10 A to 20mA Low Voltage Reference 1.235 Max. 0.6 Dynamic Impedance (A grade) Low Temperature Coefficient
AMS9491
1.235V VOLTAGE REFERENCE
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 10A 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 longterm 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.
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