Datasheet ADR512 (Analog Devices)

1.2 V Precision Low Noise Shunt Voltage Reference Data Sheet ADR512 FEATURES PIN CONFIGURATION Precision 1.200 V Voltage Reference ADR512 Ultracompact 3 mm × 3 mm 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: ±0.3% Max (Not to Scale) Temperature Coefficient: 60 ppm/°C Max
001
NC = NO CONNECT. DO NOT Operating Current Range: 100 µA to 10 mA CONNECT TO THIS PIN.
03700-
Output Impedance: 0.3 Ω Max
Figure 1. 3-Lead SOT-23
Temperature Range: −40°C to +85°C Table 1. APPLICATIONS Initial Temperature Output Accuracy Coefficient Precision Data Acquisition Systems Model Voltage (VO) (mV) (%) (ppm/°C) Battery-Powered Equipment:
ADR512ARTZ-REEL7 1.200 3.5 0.3 60
Cellular Phone, Notebook Computer, PDA, and GPS 3 V/5 V, 8-/12-Bit Data Converters Portable Medical Instruments Industrial Process Control Systems Precision Instruments GENERAL DESCRIPTION
Designed for space critical applications, the ADR512 is a low maximum of 10 mA. This low operating current and ease of use voltage (1.200 V), precision shunt-mode voltage reference in the make the ADR512 ideally suited for handheld battery-powered ultracompact (3 mm × 3 mm) SOT-23 package. The ADR512 applications. features low temperature drift (60 ppm/°C), high accuracy A TRIM terminal is available on the ADR512 to provide (±0.30%), and ultralow noise (4 µV p-p) performance. adjustment of the output voltage over ±0.5% without affecting The ADR512’s advanced design eliminates the need for an the temperature coefficient of the device. This feature provides external capacitor, yet it is stable with any capacitive load. The users with the flexibility to trim out any system errors. minimum operating current increases from a scant 100 µA to a
VS IL + IQ RBIAS IL VOUT = 1.2V C ADR512 I OUT Q (OPTIONAL) V
002
S – VOUT RBIAS = IL + IQ
03700- 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 Parameter Definitions Temperature Coefficient Thermal Hysteresis Applications Section Adjustable Precision Voltage Source Output Voltage Trim Using the ADR512 with Precision Data Converters Precise Negative Voltage Reference Outline Dimensions Ordering Guide