THX HiFi Audio Amplifier

Triad Semiconductor’s TS8001 is an ultra-low noise, low quiescent current stereo headphone amplifier optimized for audiophile-quality performance in portable consumer applications. The device incorporates the ultra-low distortion Achromatic Audio Amplifier from THX® Technology (THX AAA™) to virtually eliminate crossover distortion and deliver superior THD and SNR at all output levels. The ClassG architecture maximizes battery life by automatically varying the supply voltage of the headphone amplifier based on the audio signal level. The ground-centered, “Capless” output implementation eliminates the need for large external DC-blocking capacitors between the audio amplifiers and the headphone loads to save board area, reduce cost, and improve low frequency audio fidelity.

The headphone amplifier features fully differential inputs with integrated low pass filtering to reduce system noise. Built-in active suppression eliminates clicks and pops as the amplifier is powered up and down. The amplifier outputs have robust short-circuit, thermal overload, and ESD protection.

The TS8001 is available in a tiny 25-bump wafer level chip scale package (WLCSP, 2.4mm x 2.4mm, 0.4mm pitch). The device operates from a 2.5V to 5.5V supply input and is specified over the -40C to +85C extended temperature range.

TS8001 THX HiFi Audio Amplifier 3D Package

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  • WLCSP Package
  • 2.4mm x 2.4mm
  • 0.4mm bump pitch


  • Ultra-Low Distortion THX AAA Amplifier
  • Ultra-Low Output Voltage Noise
  • Low Quiescent Current
  • High Efficiency Buck Regulator with Automatic Class-G Amplifier Supply Voltage Control
  • Ground Reference “Capless” Outputs Eliminate External DC-Blocking Capacitors.
  • Fully Differential Analog Inputs for Reduced System Noise (can be operation as Single-Ended)
  • Ground Sense Pin Eliminates Ground Loop Noise
  • Shutdown and Level Detect Logic Control
  • Click-and-Pop Suppression
  • Robust Short-Circuit, Thermal Overload, and ESD Protection
  • Wide AVDD Input Supply Voltage Operating Range: 2.5V to 5.5V
  • Inductor-Less Class-AB Operating Mode for Higher Output Voltages


  • Premium Headphone Audio Experiences
  • Cellular Phones, Smart Phones, Music Phones
  • Noise Cancelling Headphones
  • Virtual Reality Headsets
  • Augmented Reality Headsets
  • MP3 and Portable Media Players
  • Tablets, Notebook PCs, Docking Stations

Technical Data

Amplifier Supply Voltage

Positive Supply Voltage: 1.0V – 5.5V
Negative Supply Voltage: -5.5V to -1.0V

Current Consumption

Operational Quiescent Current (no input signal): 4.0mA
Shutdown Quiescent Current: 1uA

Output Power Per Channel (Outputs in Phase)

AVDD, AVEE = +/-2.5V, THD <1%, freqAUD = 1kHz, Rload = 36 Ohms: 63mW (min)
AVDD, AVEE = +/-2.5V, THD <1%, freqAUD = 1kHz, Rload = 32 Ohms: 63mW (min)
AVDD, AVEE = +/-3.6V, THD <1%, freqAUD = 1kHz, Rload = 32 Ohms: 100mW (min)

Total Harmonic Distortion (THD)

Po = 40mW, freqAUD = 1kHz, Rload = 16 Ohms: 0.0001%, -120dB
Po = 31mW, freqAUD = 1kHz, Rload = 32 Ohms: 0.00005%, -126dB

Total Harmonic Distortion plus Noise (THD+N)

Po = 40mW, freqAUD = 1kHz, Rload = 16 Ohms, A-Weighted: 0.00030%, -110dB
Po = 31mW, freqAUD = 1kHz, Rload = 32 Ohms, A-Weighted: 0.00024%, -114dB

Signal-to-Noise Ratio (SNR)

AVDD, AVSS = +/-3.6V, A-Weighted, <1% clipping distortion,
freqAUD = 1kHz, Rload = 300 Ohms, Vo = 2Vrms: 119dB

Additional Technical Data

See the TS8001 Datasheet  for additional technical data

Simplified IC Diagram

Simplified IC Diagram

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