ADR391:  2.5V Micropower, Low Noise Precision Voltage References with Shutdown

The ADR390/ADR391/ADR392/ADR395 are precision 2.048 V, 2.5 V, 4.096 V, and 5 V band gap voltage references, respectively, featuring low power and high precision in a tiny footprint. Using patented ...More

ADR391:  2.5V Micropower, Low Noise Precision Voltage References with Shutdown

Product Description

The ADR390/ADR391/ADR392/ADR395 are precision 2.048 V, 2.5 V, 4.096 V, and 5 V band gap voltage references, respectively, featuring low power and high precision in a tiny footprint. Using patented temperature drift curvature correction techniques from Analog Devices, Inc., the ADR39x references achieve a low 9 ppm/°C of temperature drift in the TSOT package.

The ADR39x family of micropower, low dropout voltage references provides a stable output voltage from a minimum supply of 300 mV above the output. Their advanced design eliminates the need for external capacitors, which further reduces board space and system cost. The combination of low power operation, small size, and ease of use makes the ADR39x precision voltage references ideally suited for battery-operated applications.

Applications

  • Battery-powered instrumentation
  • Portable medical instrumentation
  • Data acquisition systems
  • Industrial process controls
  • Automotive

    • Data Sheet, Rev. G, 2/08

    Features

    • Low Output Noise: 5 µV pp (0.1 Hz to 10 Hz)
    • Excellent Temperature Coefficient:
      A-Grade: 25 ppm/°C
      B-Grade: 9 ppm/°C
    • No External Capacitor Required
    • Low Dropout Performance: 300 mV
    • Supply Current:
      3 µA Maximum in Shutdown
      120 µA Maximum in Operation
    • Output Current Capability: 5 mA
    • Tiny Thin-SOT-23-5 Package
    • Wide Temperature Range:
      -40°C to +125°C

    Verified Circuits Using This Part

    Verified Circuits are designed for ease of use and proven to work by ADI applications engineers. To learn more about Verified Circuits from ADI, please visit Verified Circuits Home.

    Circuit Diagram

    Diagrams

    ADR391 Diagram
    Pin Configuration Diagram for ADR391

    Specifications

    Vout 2.5
    Initial Accuracy (%) 0.16
    Ref Out TC (ppm/C) 9ppm/C
    Supply Voltage Range (V) +2.8 to +18
    Supply Current (max) 120µA
    Ref Output Current (mA) 5mA
    0.1-10 Hz Noise (µV p-p) 5µV p-p
    Temp Range(s) -40 to +125
    Package TSOT
    Reference Type Series-Low Dropout

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