Datasheet ADR512W (Analog Devices)

1.2 V Precision Low Noise Shunt Voltage Reference ADR512W FEATURES PIN CONFIGURATION Precision 1.200 V voltage reference ADR512W Ultracompact 3-lead SOT-23 package V+ 1 No external capacitor required 3 TRIM/NC Low output noise: 4 µV p-p (0.1 Hz to 10 Hz) V– 2 TOP VIEW Initial accuracy: ±0.67% maximum (Not to Scale) Temperature coefficient: 60 ppm/°C maximum
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NC = NO CONNECT. DO NOT Operating current range: 100 µA to 10 mA CONNECT TO THIS PIN.
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Output impedance: 0.3 Ω maximum
Figure 1. 3-Lead SOT-23
Temperature range: −40°C to +85°C Qualified for automotive applications APPLICATIONS Automotive systems Precision data acquisition systems Microcontroller reference voltage GENERAL DESCRIPTION
Designed for space critical applications, the ADR512W is a low minimum operating current increases from a scant 100 µA to a voltage (1.200 V), precision shunt-mode voltage reference in the maximum of 10 mA. ultracompact SOT-23 package. The ADR512W features low A TRIM terminal is available on the ADR512W to provide temperature drift (60 ppm/°C), high accuracy (±0.67%), and adjustment of the output voltage over ±0.5% without affecting ultralow noise (4 µV p-p) performance. the temperature coefficient of the device. This feature provides The ADR512W’s advanced design eliminates the need for an users with the flexibility to trim out any system errors. external capacitor, yet it is stable with any capacitive load. The
VS IL + IQ RBIAS IL VOUT = 1.2V AD512W C I OUT Q (OPTIONAL)
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VS – VOUT RBIAS = IL + IQ
09938- Figure 2. Typical Operating Circuit
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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