SLIS136C September   2011  – September 2019 TPL0501-100

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  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 Thermal Information
    4. 6.4 Electrical Characteristics: Analog Specifications
    5. 6.5 Electrical Characteristics: Operating Specifications
    6. 6.6 Timing Requirements
    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 Single-Channel, 256-Position Resolution
    4. 7.4 Device Functional Modes
      1. 7.4.1 Voltage Divider Mode
      2. 7.4.2 Rheostat Mode
    5. 7.5 Programming
      1. 7.5.1 SPI Digital Interface
        1. Table 1. Register Map - Default Value 0x80
      2. 7.5.2 Ideal Resistance Values
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
    1. 9.1 Power Sequence
    2. 9.2 Wiper Position Upon Power Up
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.1 Overview

The TPL0501 has a single linear-taper digital potentiometer with 256 wiper positions and an end-to-end resistance of 100 kΩ. The potentiometer can be used as a three-terminal potentiometer or as a two-terminal rheostat. The potentiometer can be used in either voltage divider mode or rheostat mode.

The high (H) and low (L) terminals of the TPL0501 are equivalent to the fixed terminals of a mechanical potentiometer. The H and L terminals do not have any polarity restrictions (H can be at a higher voltage than L, or L can be at a higher voltage than H). The position of the wiper (W) terminal is controlled by the value in the
8-bit Wiper Resistance (WR) register. When the WR register contains all zeroes (zero-scale), the wiper terminal is closest to its L terminal. As the value of the WR register increases from all zeroes to all ones (full-scale), the wiper moves from the position closest to the L terminal, to the position closest to the H terminal. At the same time, the resistance between W and L increases, whereas the resistance between W and H decreases.