LMH3401 7-GHz, Ultra-Wideband, Fully Differential Amplifier | TI.com

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7-GHz, Ultra-Wideband, Fully Differential Amplifier



The LMH3401 is a very high-performance, differential amplifier optimized for radio frequency (RF), intermediate frequency (IF), or high-speed, time-domain applications. This device is ideal for dc- or ac-coupled applications that require a single-ended to differential conversion when driving an analog-to-digital converter (ADC). The LMH3401 generates very low levels of second-order and third-order distortion when operating in single-ended-input to differential-output or differential-input to differential-output mode.

The on-chip resistors simplify printed circuit board (PCB) implementation and provide the highest performance over the usable bandwidth of 2 GHz. This performance makes the LMH3401 ideal for applications such as test and measurement, broadband communications, and high-speed data acquisition. A common-mode reference input pin is provided to align the amplifier output common-mode with the ADC input requirements. Use this device with power supplies between 3.3 V and 5.0 V; dual-supply operation is supported when required by the application.

This level of performance is achieved at a very low power level of 275 mW when a 5.0-V supply is used. A power-down feature is also available for power savings. The LMH3401 is fabricated in Texas Instruments' advanced complementary BiCMOS process and is available in a space-saving, 14-lead UQFN package with a specified operating temperature range of –40°C to 85°C.


  • Excellent Single-Ended to Differential Conversion Performance from DC to 2 GHz
  • 7-GHz, –3-dB Bandwidth
  • Excellent HD2 and HD3 to 2 GHz:
    • –96 (HD2), –102 (HD3) at 10 MHz
    • –79 (HD2), –77 (HD3) at 500 MHz
    • –64 (HD2), –72 (HD3) at 1 GHz
    • –55 (HD2), –40 (HD3) at 2 GHz
  • Best in Class OIP3 Performance to 2 GHz:
    • 45 dBm at 200 MHz
    • 33 dBm at 1 GHz
    • 24 dBm at 2 GHz
  • Fixed Single-Ended to Differential Voltage Gain: 16 dB
  • Noise Figure: 9 dB at 200 MHz (RS = 50 Ω)
  • Slew Rate: 18,000 V/µs
  • Supports Single-Supply or Split-Supply Operation
  • Powered-Down Feature
  • Supply Current: 55 mA


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Part number Order 2nd harmonic (dBc) 3rd harmonic (dBc) @ MHz Acl, min spec gain (V/V) Approx. price (US$) Architecture BW @ Acl (MHz) Device type Features GBW (Typ) (MHz) Number of channels (#) Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Slew rate (Typ) (V/us) Total supply voltage (Min) (+5V=5, +/-5V=10) Total supply voltage (Max) (+5V=5, +/-5V=10) Vn at flatband (Typ) (nV/rtHz) Vn at 1 kHz (Typ) (nV/rtHz) Vos (offset voltage @ 25 C) (Max) (mV)
LMH3401 Order now 96     102     10     6.3     8.05 | 1ku     Fully Differential ADC Driver     7000     RF FDA     Shutdown
On chip gain resistors    
8000     1     -40 to 85     UQFN | 14     14UQFN: 6 mm2: 2.5 x 2.5 (UQFN | 14)     18000     3.15     5     1.4     3.5     1.2    
LMH5401 Order now 99     94     100     2     7.05 | 1ku     Fully Differential ADC Driver     6200     RF FDA     Shutdown     8000     1     -40 to 85     UQFN | 14     14UQFN: 6 mm2: 2.5 x 2.5 (UQFN | 14)     17500     3.15     5.25     1.25     3.8     1.2