JAJSNM7A December   2021  – August 2022 REF35

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 説明
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and 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
    6. 7.6 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Solder Heat Shift
    2. 8.2 Temperature Coefficient
    3. 8.3 Long-Term Stability
    4. 8.4 Thermal Hysteresis
    5. 8.5 Noise Performance
      1. 8.5.1 Low-Frequency (1/f) Noise
      2. 8.5.2 Broadband Noise
    6. 8.6 Power Dissipation
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Supply Voltage
      2. 9.3.2 EN Pin
      3. 9.3.3 NR Pin
    4. 9.4 Device Functional Modes
      1. 9.4.1 Basic Connections
      2. 9.4.2 Start-Up
      3. 9.4.3 Output Transient Behavior
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Negative Reference Voltage
      2. 10.2.2 Precision Power Supply and Reference
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
          1. 10.2.2.2.1 Selection of Reference
          2. 10.2.2.2.2 Input and Output Capacitors
          3. 10.2.2.2.3 Selection of ADC
        3. 10.2.2.3 Application Curves
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 サポート・リソース
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

10.2.2.3 Application Curves

Table 10-3 and Figure 10-3 show the captured measurement results for various DC inputs. The ADC output is captured and analyzed for output accuracy error and code spread with REF35500 as power supply versus LDO as power supply.

REF35 offers better accuracy and lower noise than the LDO device at lower quiescent current. This results in lower error in measurement as well as lower ADC output code variation across various OSR settings.

Table 10-3 DC Input Performance Test Results
INPUT V ADC OSR SETTING REF35500 LDO
ERROR CODE SPREAD ERROR CODE SPREAD
1.0 V 0 0.01 mV 32 LSB 8.9 mV 48 LSB
8 0.3 mV 10 LSB 9.21 mV 16 LSB
128 0.38 mV 6 LSB 9.26 mV 6 LSB
2.5 V 0 0.69 mV 32 LSB 22.89 mV 64 LSB
8 1.44 mV 10 LSB 23.63 mV 18 LSB
128 1.17 mV 3 LSB 23.41 mV 5 LSB
4 V 0 2.27 mV 32 LSB 37.84 mV 48 LSB
8 3.01 mV 24 LSB 38.62 mV 24 LSB
128 2.46 mV 3 LSB 38.09 mV 17 LSB
Figure 10-3 Error vs Input Voltage