SBOSAI6 June   2024 THS6232

PRODUCTION DATA  

  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
    5. 5.5 Electrical Characteristics VS = 12V
    6. 5.6 Electrical Characteristics VS = 40V
    7. 5.7 Timing Requirements
    8. 5.8 Typical Characteristics VS = 12V
    9. 5.9 Typical Characteristics VS = 40V
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Common-Mode Buffer
      2. 6.3.2 Thermal Protection and Package Power Dissipation
      3. 6.3.3 Output Voltage and Current Drive
      4. 6.3.4 Breakdown Supply Voltage
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Broadband PLC Line Driving
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curve
    3. 7.3 Best Design Practices
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Examples
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
    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

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RHF|24
Thermal pad, mechanical data (Package|Pins)

7.2.1.2 Detailed Design Procedure

The closed-loop gain equation for a differential line driver such as the THS6232 is given as:

Equation 2. AV = 1 + 2 × (RF / RG)

where RF = RF1 = RF2.

The THS6232 is a current-feedback amplifier, and thus the bandwidth of the closed-loop configuration is set by the value of the RF resistor. This advantage of the current-feedback architecture allows for flexibility in setting the differential gain by choosing the value of the RG resistor without reducing the bandwidth, as is the case with voltage-feedback amplifiers. The THS6232 is designed to provide excellent bandwidth performance with RF1 = RF2 = 1.24kΩ. To configure the device in a gain of 10V/V, use an RG resistor value of 274Ω. For operation in ultra-low-bias mode, use a minimum RF1 = RF2 = 2kΩ, and for device gain of 10V/V, use RG = 442Ω. See Current feedback amplifiers - Overview and compensation techniques video for more details on how to choose the RF resistor to optimize the performance of a current-feedback amplifier.

Often, a key requirement for PLC applications is the out-of-band suppression specifications. The in-band frequencies carry the encoded data with a certain power level. The line driver must not generate any spurs beyond a certain power level outside the in-band spectrum. In the design requirements of this application example, the minimum out-of-band suppression specification of 35dB means there must be no frequency spurs in the out-of-band spectrum beyond the –45dBm transmit power, considering the in-band transmit power is –10dBm.

The circuit shown in Figure 7-2 measures the out-of-band suppression specification. The minor difference in components between the circuits of Figure 7-1 and Figure 7-2 does not have any significant impact on the out-of-band suppression results.

THS6232 Measurement Test Circuit for Out-of-Band Suppression Figure 7-2 Measurement Test Circuit for Out-of-Band Suppression