ZRT040

4.0V LOW POWER PRECISION REFERENCE SOURCE ISSUE 2 - OCTOBER 1997 DEVICE 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 3-pin metal can package for through hole applications as well as SOT223 and SO8 packages for surface mount applications. Each package option offers a trim facility whereby the output voltage can be adjusted as shown in F i g . 1. Thi s f a ci l i t y i s u sed w he n 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. ZRT040 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 TO18 package SOT223 and SO8 small outline packages SCHEMATIC DIAGRAM R VCC VR R=VCC-VR IR RT=100k (Optional trim facility) Gnd Gnd Figure 1: This circuit will allow the reference to be trimmed over a wide range. The device is specified over a Ϯ5% trim range. 4-283 ZRT040 ABSOLUTE MAXIMUM RATING Reverse Current Operating Temperature A grade B grade C grade Storage Temperature TO18 SO8, SOT223 75mA ø -55°C to 125°C -40°C to 85°C 0°C to 70°C -55 °C to 17...