1 W differential input/output audio power amplifier with selectable standby

The TS4994 is an audio power amplifier capable of delivering 1W of continuous RMS output power into an 8Ω load @ 5V. Due to its differential inputs, it exhibits outstanding noise immunity.

An external standby mode control reduces the supply current to less than 10nA. An STBY MODE pin allows the standby to be active HIGH or LOW (except in the MiniSO-8 version). An internal thermal shutdown protection is also provided, making the device capable of sustaining short-circuits.

The device is equipped with common mode feedback circuitry allowing outputs to be always biased at VCC/2 regardless of the input common mode voltage.

The TS4994 is designed for high quality audio applications such as mobile phones and requires few external components.

Key Features

  • Available in DFN10 3x3 (0.5mm pitch) & MiniSO-8
  • Ultra fast startup time: 15ms typ.
  • All lead-free packages
  • Ultra-low consumption in standby mode (10nA)
  • 90dB CMRR @ 217Hz
  • Differential inputs
  • 100dB PSRR @ 217Hz with grounded inputs
  • Near-zero pop & click
  • 1W rail-to-rail output power @ VCC =5V, THD = 1%, F = 1kHz, with 8Ωload
  • Selectable standby mode (active low or active high)
  • Operating range from VCC = 2.5V to 5.5V

Resources

Technical Documentation

Product Specifications
Description Version Size
DS3742 DS3742: 1W differential input/output audio power amplifier with selectable standby 5.1 474 KB

Presentations & Training Material

Presentations
Description Version Size
ST offering in Wearable - Analog and Mixed Signal Portfolio 3.0 1 MB

Publications and Collaterals

Brochures
Description Version Size
ST’s solutions for mobile devices 3.2 3 MB
Support & Community


Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
TS4994IST MSOP/TSSOP 8 Tape And Reel - - Active 0.564 1000 NEC EAR99 MALAYSIA MORE INFO No availability reported, please contact our Sales office
TS4994IQT VDFPN 10 3x3x1.0 Tape And Reel - - NRND 0.597 1000 NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
TS4994IST ActiveMSOP/TSSOP 8-Ecopack3
TS4994IQT NRNDVDFPN 10 3x3x1.0-Ecopack1 0 0
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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