SBOSAG5 December   2024  – December 2024 TLV2888

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information: TLV2888
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Input Common-Mode Range
      2. 6.3.2 Phase-Reversal Protection
      3. 6.3.3 Chopping Transients
      4. 6.3.4 EMI Rejection
      5. 6.3.5 Electrical Overstress
      6. 6.3.6 MUX-Friendly Inputs
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Basic Noise Calculations
    2. 7.2 Typical Applications
      1. 7.2.1 High-Side Current Sensing
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curve
      2. 7.2.2 Programmable Current Source
      3. 7.2.3 Programmable Current Source For A Grounded Load
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 PSpice® for TI
        2. 8.1.1.2 TINA-TI™ Simulation Software (Free Download)
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.2.1.1 Design Requirements

A common systems requirement is to monitor the current being delivered to a load. Monitoring confirms that normal current levels are being maintained, and also provides an alert if an overcurrent condition occurs.

Fortunately, a relatively simple current monitor circuit can be achieved using a precision op amp, such as the TLVx888. This device has exceptional precision and wide gain bandwidth product to accommodate for very high gain configurations.

The TLVx888 is configured as a difference amplifier with a predetermined gain. The difference amplifier inputs are connected across a sense resistor through which the load current flows. The sense resistor can be connected to the high side or low side of the circuit through which the load current flows. Commonly, high-side current sensing is applied. Figure 7-3 shows an applicable TLVx888 configuration. Low-side current sensing can be applied as well if the sense resistor can be placed between the load and ground.

Use the following parameters for this design example:

  • Dual supply: ±15V
  • Linear output voltage range: 0V to 5V
  • Load current, IL: 1mA to 100mA

The following design details and equations can be used to reconfigure this design for different output voltage ranges and current loads.