SBOSA39A April   2025  – October 2025 THS3470

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 = ±30V
    6. 5.6 Electrical Characteristics ±VS = ±20V
    7. 5.7 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 Output Current Limit
      2. 6.3.2 Output Current Enable
      3. 6.3.3 Over Temperature Flag
      4. 6.3.4 Output Current Flags
      5. 6.3.5 Output Current Monitoring
      6. 6.3.6 Die Temperature Monitoring
      7. 6.3.7 External Compensation
    4. 6.4 Device Functional Modes
      1. 6.4.1 Power Modes
      2. 6.4.2 Choosing a Feedback Resistor
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 High-Voltage, High-Precision, Composite Amplifier
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curves
      2. 7.2.2 120V Bootstrap Amplifier
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
        3. 7.2.2.3 Application Performance Plots
    3. 7.3 Short Circuit Protection
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Thermal Considerations
        1. 7.5.1.1 Top-Side Cooling Benefits
        2. 7.5.1.2 THS3470 Safe Operating Area
      2. 7.5.2 Layout Guidelines
      3. 7.5.3 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 TAPE AND REEL INFORMATION

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • REB|42
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The THS3470 is a high-speed current-feedback amplifier (CFA) with a high linear-output current drive (1.35A), high slew rate (6500V/μs peak), and wide supply range (60V). The device is stable over a wide range of capacitive loads and supports up to 2A of peak output current that these applications require. The THS3470 has a bandwidth of 70MHz with low-noise and distortion providing great large-signal performance for heavy resistive loads as well.

In addition to high speed and power performance, the THS3470 features a number of useful features such as temperature monitoring, output current monitoring, output current limiting, and output current protection. The output current features of the device can be manually enabled or driven by various flag outputs from the device providing even greater modularity in the use case of the device.

The THS3470 is available in a VQFN-42 (REB) package, providing small-size with an exposed top-side thermal pad for direct heat transfer to a heat sink. The THS3470 is characterized for operation over the wide temperature range of –40°C to +125°C.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
THS3470 REB (VQFN, 42) 7mm × 7mm
(1) For more information, see Section 10.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
THS3470 THS3470 Driving Capacitive LoadTHS3470 Driving Capacitive Load
THS3470 Harmonic Distortion vs Frequency (RLOAD = 100Ω)Harmonic Distortion vs Frequency (RLOAD = 100Ω)