THS4511 Wideband, Low Noise, Low Distortion Fully Differential Amplifier |

THS4511 (ACTIVE) Wideband, Low Noise, Low Distortion Fully Differential Amplifier



The THS4511 is a wideband, fully-differential operational amplifier designed for single-supply 5-V data-acquisition systems. It has very low noise at 2 nV/√Hz, and extremely low harmonic distortion of –72 dBc HD2 and –87 dBc HD3 at 70 MHz with 2 VPP, G = 0 dB, and 200- load. Slew rate is very high at 4900 Vµs and with settling time of 3.3 ns to 1% (2 V step) it is ideal for pulsed applications. It is designed for minimum gain of 0 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 5-mV offset (typical) from the set voltage, when set within ±0.5 V of midsupply. The common-mode set point is set to midsupply by internal circuitry, which may be over-driven from an external source.

The THS4511 is a high-performance amplifier that has been optimized for use in 5-V single-supply data acquisition systems. The output has been optimized for best performance with its common-mode voltages set to midsupply, and the input has been optimized for performance over a wide range of common-mode input voltages. High performance at a low power-supply voltage enables single-supply 5-V data-acquisition systems while minimizing component count.

The THS4511 is offered in a quad, 16-pin leadless QFN package (RGT), and is characterized for operation over the full industrial temperature range from –40°C to +85°C.


  • Fully-Differential Architecture
  • Common-Mode Input Range Includes the Negative Rail
  • Unity-Gain Stable
  • Bandwidth: 1.6 GHz (Gain = 0 dB)
  • Slew Rate: 4900 V/µs
  • 1% Settling Time: 3.3 ns
  • HD2: –72 dBc at 70 MHz
  • HD3: –87 dBc at 70 MHz
  • OIP2: 76 dBm at 70 MHz
  • OIP3: 42 dBm at 70 MHz
  • Input Voltage Noise: 2 nV/√Hz (f > 10 MHz)
  • Noise Figure: 21.8 dB (50- System, G = 6 dB)
  • Output Common-Mode Control
  • 5-V Power-Supply Current: 39.2 mA
  • Power-Down Capability: 0.65 mA
    • 5-V Data-Acquisition Systems
    • High Linearity ADC Amplifiers
    • Wireless Communication
    • Medical Imaging
    • Test and Measurement


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Part number Order Number of channels (#) Operating temperature range (C)
THS4511 Order now 1     -40 to 85    
THS4508 Samples not available 1     -40 to 85    
THS4509 Order now 1     -40 to 85    
THS4513 Order now 1     -40 to 85