DESCRIPTION
The ZRT040 is a monolithic integrated circuit providing a precise stable reference voltage of 4.01V at 500µA.
The circuit features a knee current of 150µA and operation over a wide range of temperatures and currents.
The ZRT040 is available in a SOT223 package for surface mount applications. This device offers a trim facility whereby the output voltage can be adjusted as shown in Fig.1. This facility is used when compensating for system errors or setting the reference output to a particular value. When the trim facility is not used, the pin should be left open circuit.

FEATURES
• Trimmable output
• Excellent temperature stability
• Low output noise figure
• Available in three temperature ranges
• 1 and 2% initial voltage tolerance versions available
• No external stabilising capacitor required in most cases
• Low slope resistance
• SOT223 small outline packages