7-GHz, Ultra-Wideband, Fully Differential Amplifier - LMH3401


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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Parametrics Compare all products in High-Speed Op Amps (>=50MHz)

Number of Channels (#)
Total Supply Voltage (Min) (+5V=5, +/-5V=10)
Total Supply Voltage (Max) (+5V=5, +/-5V=10)
BW @ Acl (MHz)
Acl, min spec gain (V/V)
Slew Rate (Typ) (V/us)
Vn at Flatband (Typ) (nV/rtHz)
Vn at 1kHz (Typ) (nV/rtHz)
Iq per channel (Typ) (mA)
Vos (Offset Voltage @ 25C) (Max) (mV)
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
CMRR (Typ) (dB)
Input Bias Current (Max) (pA)
Offset Drift (Typ) (uV/C)
GBW (Typ) (MHz)
Output Current (Typ) (mA)
2nd Harmonic (dBc)
3rd Harmonic (dBc)
@ MHz
LMH3401 LMH5401
Fully Differential
Voltage FB   
Fully Differential
Voltage FB   
1    1   
3.15    3.15   
5    5.25   
7000    6200   
6.3    2   
18000    17500   
1.4    1.25   
3.5    3.8   
55    55   
1.2    1.2   
No    No   
Shutdown    Shutdown   
Catalog    Catalog   
-40 to 85    -40 to 85   
14UQFN: 6 mm2: 2.5 x 2.5(UQFN)    14UQFN: 6 mm2: 2.5 x 2.5(UQFN)   
72    72   
10000000    60000000   
0.63    0.63   
8000    8000   
50    50   
96    99   
102    94   
10    100