link to page 9 link to page 9 ADR512W R1 in Figure 14 should be chosen so that 100 μA to 10 mA is +ADR512W provided to properly bias the ADR512W. ––1.2V V R DD 1 = (5) I R2 014 The resistor, R1, should be chosen so that power dissipation is –VDD 09938- at a minimum. An ideal resistor value can be determined Figure 14. Precise −1.2 V Reference Configuration through manipulation of Equation 5. Because the ADR512W characteristics resemble those of a Zener diode, the cathode shown in Figure 14 is 1.2 V higher with respect to the anode (V+ with respect to V− on the ADR512W package). Because the cathode of the ADR512W is tied to ground, the anode must be −1.2 V. Rev. 0 | Page 9 of 12 Document Outline Features Applications Pin Configuration General Description Revision History Specifications Electrical Characteristics Absolute Maximum Ratings Thermal Resistance ESD Caution Typical Performance Characteristics Terminology Applications Information Adjustable Precision Voltage Source Output Voltage Trim Using the ADR512W with Precision Data Converters Precise Negative Voltage Reference Outline Dimensions Ordering Guide Automotive Products
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