SLOS454I January   2005  – July 2016 THS4509

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics: VS+ - VS- = 5 V
    6. 7.6 Electrical Characteristics: VS+ - VS- = 3 V
    7. 7.7 Dissipation Ratings
    8. 7.8 Typical Characteristics
      1. 7.8.1 Typical Characteristics: VS+ - VS- = 5 V
      2. 7.8.2 Typical Characteristics: VS+ - VS- = 3 V
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Test Circuits
        1. 8.3.1.1 Frequency Response
        2. 8.3.1.2 Distortion and 1-dB Compression
        3. 8.3.1.3 S-Parameter, Slew Rate, Transient Response, Settling Time, Output Impedance, Overdrive, Output Voltage, Turnon, and Turnoff Time
        4. 8.3.1.4 CM Input
        5. 8.3.1.5 CMRR and PSRR
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Differential Input to Differential Output Amplifier
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Input Common-Mode Voltage Range
          2. 9.2.1.2.2 Setting the Output Common-Mode Voltage
          3. 9.2.1.2.3 Single-Supply Operation (3 V to 5 V)
          4. 9.2.1.2.4 THS4509 and ADS5500 Combined Performance
          5. 9.2.1.2.5 THS4509 and ADS5424 Combined Performance
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Single-Ended Input to Differential Output Amplifier
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 General Guidelines
      2. 11.1.2 PowerPAD PCB Layout Considerations
    2. 11.2 Layout Example
    3. 11.3 PowerPAD Design Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

1 Features

  • Fully-Differential Architecture
  • Centered Input Common-Mode Range
  • Output Common-Mode Control
  • Minimum Gain of 2 V/V (6 dB)
  • Bandwidth: 1900 MHz
  • Slew Rate: 6600 V/μs
  • 1% Settling Time: 2 ns
  • HD2: –75 dBc at 100 MHz
  • HD3: –80 dBc at 100 MHz
  • OIP3: 37 dBm at 70 MHz
  • Input Voltage Noise: 1.9 nV/√Hz (f > 10 MHz)
  • Power-Supply Voltage: 3 V to 5 V
  • Power-Supply Current: 37.7 mA
  • Power-Down Current: 0.65 mA

2 Applications

  • 5-V Data Acquisition Systems High
    Linearity ADC Amplifiers
  • Wireless Communication
  • Medical Imaging
  • Test and Measurement

3 Description

The THS4509 device is a wideband, fully-differential op amp designed for 5-V data acquisition systems. It has a low noise at 1.9 nV/√Hz, and low harmonic distortion of –75 dBc HD2 and –80 dBc HD3 at 100 MHz with 2 VPP, G = 10 dB, and 1-kΩ load. Slew rate is high at 6600 V/μs, and with settling time of 2 ns to 1% (2-V step), it is ideal for pulsed applications. It is designed for a minimum gain of 6 dB, but is optimized for gains of 10 dB.

To allow for DC coupling to analog-to-digital converters (ADCs), its unique output common-mode control circuit maintains the output common-mode voltage within 3-mV offset (typical) from the set voltage, when set within 0.5-V of midsupply, with less than 4-mV differential offset voltage. The common-mode set point is set to midsupply by internal circuitry, which may be overdriven from an external source.

The input and output are optimized for best performance with the common-mode voltages set to midsupply. Along with high performance at low power-supply voltage, this design makes it ideal for high-performance, single-supply 5-V data acquisition systems. The combined performance of the THS4509 in a gain of 10 dB driving the ADS5500 ADC, sampling at 125 MSPS, is 81-dBc SFDR and
69.1-dBc SNR with a –1 dBFS signal at 70 MHz.

The THS4509 is offered in a quad, leadless VQFN-16 package (RGT), and is characterized for operation over the full industrial temperature range from –40°C to +85°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
THS4509 VQFN (16) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Test Configuration

THS4509 pg1_cir_app_los454.gif

Measured 3rd Order Intermodulation Spurious Signal Level

THS4509 pg1_cir_graph_los454.gif