SBAS901C July   2018  – October 2020 REF34-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1. 6.1 Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
  8. 8 Typical Characteristics
  9. 9 Parameter Measurement Information
    1. 9.1 Solder Heat Shift
    2. 9.2 Long-Term Stability
    3. 9.3 Thermal Hysteresis
    4. 9.4 Power Dissipation
    5. 9.5 Noise Performance
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Supply Voltage
      2. 10.3.2 Low Temperature Drift
      3. 10.3.3 Load Current
    4. 10.4 Device Functional Modes
      1. 10.4.1 EN Pin
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Applications
      1. 11.2.1 Basic Voltage Reference Connection
        1. 11.2.1.1 Design Requirements
        2. 11.2.1.2 Detailed Design Procedure
          1. 11.2.1.2.1 Input and Output Capacitors
          2. 11.2.1.2.2 4-Wire Kelvin Connections
          3. 11.2.1.2.3 VIN Slew Rate Considerations
          4. 11.2.1.2.4 Shutdown/Enable Feature
        3. 11.2.1.3 Application Curves
      2. 11.2.2 Advanced Driver Assistance Systems (ADAS) Microcontroller Connection
        1. 11.2.2.1 Basic Voltage Reference Connection
        2. 11.2.2.2 Design Requirements
        3. 11.2.2.3 Detailed Design Procedure
        4. 11.2.2.4 Enable Feature in ADAS
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Documentation Support
      1. 14.1.1 Related Documentation
    2. 14.2 Receiving Notification of Documentation Updates
    3. 14.3 Support Resources
    4. 14.4 Trademarks
    5. 14.5 Electrostatic Discharge Caution
    6. 14.6 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

3 Description

The REF34-Q1 devices are low-temperature-drift
(6 ppm/°C), low-power, high-precision CMOS voltage references. The devices have ±0.05% initial accuracy and low operating current with power consumption less than 95 μA. These devices also offer very low output noise of 3.8 µVPP/V, which enable the devices to maintain high signal integrity with high-resolution data converters and noise critical systems.

Stability and system reliability are further improved by the low output-voltage hysteresis of these devices and low long-term output voltage drift. Furthermore, the small size and low operating current of the devices (95 μA) make them an excellent choise for battery-powered applications. The REF34-Q1 features an enable pin that can set the device into shutdown where it consumes a low stand by current (3 μA) to help with overall system power during standby.

The REF34-Q1 family is specified for the wide temperature range of −40°C to +125°C. Contact the TI sales representative for additional voltage options.

Device Information(1)
PART NUMBERPACKAGEBODY SIZE (NOM)
REF34xx-Q1SOT-23 (6)2.90 mm × 1.60 mm
REF34xxS-Q1SOT-23 (5)2.90 mm × 1.60 mm
REF34xx-Q1VSSOP (8)4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
GUID-06EB758D-43BA-4D47-819B-EF5B33604BC8-low.gifSimplified Schematic
GUID-C0D4C19A-2799-4D38-B41F-3CA4E9DB6ADC-low.gifDropout vs Current Load Over Temperature