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  • THS4561 Low-Power, High Supply Range, 60-MHz, Fully Differential Amplifier

    • SBOS874D August   2017  – February 2021 THS4561

      PRODUCTION DATA  

  • CONTENTS
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  • THS4561 Low-Power, High Supply Range, 60-MHz, Fully Differential Amplifier
  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 to 12 V
    6. 7.6 Typical Characteristics: (VS+) – (VS–) = 12 V
    7. 7.7 Typical Characteristics: (VS+) – (VS–) = 5 V
    8. 7.8 Typical Characteristics: (VS+) – (VS–) = 3 V
    9. 7.9 Typical Characteristics: (VS+) – (VS–) = 3-V to 12-V Supply Range
  8. 8 Parameter Measurement Information
    1. 8.1 Example Characterization Circuits
    2. 8.2 Output Interface Circuit for DC-Coupled Differential Testing
    3. 8.3 Output Common-Mode Measurements
    4. 8.4 Differential Amplifier Noise Measurements
    5. 8.5 Balanced Split-Supply Versus Single-Supply Characterization
    6. 8.6 Simulated Characterization Curves
    7. 8.7 Terminology and Application Assumptions
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
      1. 9.4.1 Power-Down Mode
      2. 9.4.2 Single-Ended Source to Differential Output Mode
        1. 9.4.2.1 AC-Coupled Signal Path Considerations for Single-Ended Input to Differential Output Conversions
        2. 9.4.2.2 DC-Coupled Input Signal Path Considerations for Single-Ended to Differential Conversions
      3. 9.4.3 Differential Input to a Differential Output Mode
        1. 9.4.3.1 AC-Coupled, Differential-Input to Differential-Output Design Issues
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Differential Open-Loop Gain and Output Impedance
      2. 10.1.2 Setting Resistor Values Versus Gain
      3. 10.1.3 Noise Analysis
      4. 10.1.4 Factors Influencing Harmonic Distortion
      5. 10.1.5 Input Overdrive Performance
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 Board Layout Recommendations
    2. 12.2 Layout Examples
  13. 13Device and Documentation Support
    1. 13.1 Receiving Notification of Documentation Updates
    2. 13.2 Support Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information
  15. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • RUN|10
    • MPQF225C
  • DGK|8
    • MPDS028E
  • RGT|16
    • MPQF119H
Thermal pad, mechanical data (Package|Pins)
  • RUN|10
    • QFND329A
  • RGT|16
    • QFND098S
Orderable Information
  • sbos874d_oa
  • sbos874d_pm
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DATA SHEET

THS4561 Low-Power, High Supply Range, 60-MHz, Fully Differential Amplifier

1 Features

  • Bandwidth: 60 MHz (G = 1 V/V)
  • Slew Rate: 230 V/µs
  • Gain Bandwidth Product: 68 MHz
  • Voltage Noise:
    • 1/f Voltage Noise Corner: 8 Hz
    • Broadband Noise (≥ 500 Hz): 4 nV/√ Hz
  • Input Offset: ±250 µV (Maximum)
    • Drift: ±4 µV/°C (Maximum)
  • Supply Operating Range: 2.85 V to 12.6 V
  • Supply Current: 775 µA
  • Negative Rail Input (NRI)
  • Rail-to-Rail Output (RRO)
  • Very Low Harmonic Distortion:
    • HD2: –117 dBc at 2 VPP, 100 kHz
    • HD3: –124 dBc at 2 VPP, 100 kHz
  • 0.01% Settling (2-V Step): 90 ns

2 Applications

  • 16-bit to 20-bit, Differential, SAR and ΔΣ Drivers
  • Differential Active Filters
  • High Output Swing PCM Audio DAC Outputs
  • Medical Ultrasounds
  • Battery Testers
  • Power Analyzers
  • Lower Power Alternate to the THS4551

3 Description

The THS4561 fully differential amplifier (FDA) offers a simple interface from single-ended sources to the differential output required by precision analog-to-digital converters (ADCs). Designed for a very low,
8-Hz, 1/f voltage noise corner and low, 130-dB total harmonic distortion (THD) while consuming only a
775-µA quiescent current, the THS4561 is well suited for power-sensitive data acquisition (DAQ) systems where high performance is required with the best signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) through the amplifier and ADC combination.

The THS4561 features the required negative rail input when interfacing a DC-coupled, ground-centered, source signal to a single-supply, differential-input ADC. Low DC error and drift terms support the emerging high-speed and high-resolution successive approximation register (SAR) and delta-sigma (ΔΣ) ADC input requirements. A 2.85-V to 12.6-V supply range with a flexible output common-mode setting with low headroom to the supplies supports a wide range of ADC input and digital-to-analog converter (DAC) output requirements.

The THS4561 device is characterized for operation from –40°C to +125°C.

Device Information
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
THS4561 VSSOP (8) 3.00 mm × 3.00 mm
WQFN (10) 2.00 mm × 2.00 mm
VQFN (16) 3.00 mm × 3.00 mm
(1) For all available packages, see the package option addendum at the end of the data sheet.
GUID-7B332BF2-8EE6-449D-8B2E-E98CE5F68A24-low.gifGain of 10 V/V PCM Audio DAC Output With Second-Order MFB Filter at 50 kHz
GUID-C1C2778F-1F7A-4D7B-9D89-8C334F0DA721-low.gifHarmonic Distortion vs Frequency

 
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