ZHCSHJ6 February   2019 DRV5021-Q1

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      典型应用电路原理图
      2.      磁响应
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Magnetic Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Field Direction Definition
      2. 7.3.2 Device Output
      3. 7.3.3 Power-On Time
      4. 7.3.4 Hall Element Location
      5. 7.3.5 Propagation Delay
      6. 7.3.6 Output Stage
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Proximity Sensing Circuit
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Configuration Example
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Alternative Two-Wire Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 文档支持
      1. 11.1.1 相关文档
    2. 11.2 接收文档更新通知
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 术语表
  12. 12机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

8.2.1.2.1 Configuration Example

In a 3.3-V system, 3.2 V ≤ Vref ≤ 3.4 V. Use Equation 3 to calculate the allowable range for R1.

Equation 3. DRV5021-Q1 drv5021-equation-1.gif

For this design example, use Equation 4 to calculate the allowable range of R1.

Equation 4. DRV5021-Q1 drv5021-equation-2.gif

Therefore:

Equation 5. 170 Ω ≤ R1 ≤ 32 kΩ

After finding the allowable range of R1 (Equation 5), select a value between 500 Ω and 32 kΩ for R1.

Assuming a system bandwidth of 10 kHz, use Equation 6 to calculate the value of C2.

Equation 6. DRV5021-Q1 eq_02_slis150.gif

For this design example, use Equation 7 to calculate the value of C2.

Equation 7. DRV5021-Q1 eq_04_slis150.gif

An R1 value of 10 kΩ and a C2 value less than 820 pF satisfy the requirement for a 10-kHz system bandwidth.

For R1 = 10 kΩ and C2 = 680 pF, the corner frequency for the low-pass filter is 23.4 kHz.