(ACTIVE) Automotive High-Speed Differential I/O Amplifier


Functional diagram


The THS4541-Q1 device is a low-power, voltage-feedback, fully differential amplifier (FDA) with an input common-mode range below the negative rail, and rail-to-rail output. Designed for low-power data acquisition systems where high density is critical in a high-performance analog-to-digital converter (ADC) or digital-to-analog converter (DAC) interface design.

The THS4541-Q1 device features the negative-rail input required when interfacing a DC-coupled, ground-centered, source signal. This negative-rail input, with rail-to-rail output, allows for easy interface between single-ended, ground-referenced, bipolar signal sources and a wide variety of successive approximation register (SAR), delta-sigma (ΔΣ), or pipeline ADCs using only a single 2.7-V to 5.4-V power supply.

The THS4541-Q1 device is characterized for operation over the wide temperature range of –40°C to +125°C available in a 16-pin VQFN package.


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C
      to +125°C Ambient Operating Temperature
    • Device HBM Classification Level 2
    • Device CDM Classification Level C6
  • Fully Differential Amplifier (FDA) Architecture
  • Bandwidth: 500 MHz (G = 2 V/V)
  • Gain Bandwidth Product: 850 MHz
  • Slew Rate: 1500 V/µs
  • HD2: –95 dBc at 10 MHz (2 VPP, RL = 500 Ω)
  • HD3: –90 dBc at 10 MHz (2 VPP, RL = 500 Ω)
  • Input Voltage Noise: 2.2 nV/Hz (f > 100 kHz)
  • Low offset drift: ±0.5 µV/°C (typ)
  • Negative Rail Input (NRI)
  • Rail-to-Rail Output (RRO)
  • Robust Operation for Rload ≥ 50 Ω
  • Output Common-Mode Control
  • Power Supply:
    • Single-Supply Voltage Range: 2.7 V to 5.4 V
    • Split-Supply Voltage Range: ±1.35 V to ±2.7 V
    • Quiescent Current: 10.1 mA (5-V Supply)
  • Power-Down Capability: 2 µA (typ)


Architecture Fully Differential   
Number of Channels (#) 1   
Total Supply Voltage (Min) (+5V=5, +/-5V=10) 2.7   
Total Supply Voltage (Max) (+5V=5, +/-5V=10) 5.4   
BW @ Acl (MHz) 620   
Acl, min spec gain (V/V) 1   
Slew Rate (Typ) (V/us) 1500   
Vn at Flatband (Typ) (nV/rtHz) 2.2   
Vn at 1kHz (Typ) (nV/rtHz) 32   
Iq per channel (Typ) (mA) 10.1   
Vos (Offset Voltage @ 25C) (Max) (mV) 0.45   
Rail-to-Rail In to V-^Out   
Features Shutdown   
Rating Automotive   
Operating Temperature Range (C) -40 to 125   
Package Group VQFN   
Package Size: mm2:W x L (PKG) 16VQFN: 9 mm2: 3 x 3(VQFN)   
CMRR (Typ) (dB) 100   
Input Bias Current (Max) (pA) 13000000   
Offset Drift (Typ) (uV/C) 2.4   
GBW (Typ) (MHz) 850   
Output Current (Typ) (mA) 100   
2nd Harmonic (dBc) 95   
3rd Harmonic (dBc) 90   
@ MHz 10   

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