GENERAL DESCRIPTION
The AMS1009 is a precision band-gap voltage reference diode. This voltage reference features a very low dynamic impedance and good temperature coefficient, operating over a wide current range of 400µA to 10mA. On-chip trimming is used to provide tight tolerance and minimize temperature drift. A third terminal allows the reference voltage to be adjusted to ±5% to calibrate out system errors.
The AMS1009 is used as a precision 2.5V low voltage reference for digital voltmeters, power supplies or op amp circuitry, and the 2.5V make it easy to obtain a stable reference from 5V logic supplies.
The AMS1009 is available in TO-92 and SO-8 packages operating over a 0°C to 70°C temperature range.

FEATURES
 • ±5 mV (±0.2%) Max. Initial Tolerance (A grade)
 • Wide Operating Current Range
 • Low Voltage Reference 2.5V
 • Max. 0.6W Dynamic Impedance (A grade)
 • Low Temperature Coefficient

APPLICATIONS
 • Power Supplies
 • Instrumentation
 • 8 Bit A/D, D/A Reference
 • Current Loop Measurement and Control Systems
 • Reference for 5V Systems