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TS488：Pop-free 120mW stereo headphone amplifier

The TS488/9 is an enhancement of TS486/7 that eliminates pop and click noise and reduces the number of external passive components.

The TS488/9 is a dual audio power amplifier capable of driving, in single-ended mode, either a 16 Ω or a 32 Ω stereo headset.

Capable of descending to low voltages, it delivers up to 31 mW per channel (into 16 Ω loads) of continuous average power with 0.1% THD+N in the audio bandwidth from a 2.5 V power supply.

An externally-controlled standby mode reduces the supply current to 10 nA (typ.). The unity gain stable TS488/9 is configured by external gain-setting resistors.

Key Features

• Pop and click noise protection circuitry
• Operating range from VCC = 2.2 V to 5.5 V
• Standby mode active low (TS488) or high (TS489)
• Output power:
  • 120 mW at 5 V, into 16 Ω with 0.1% THD+N max (1 kHz)
  • 55 mW at 3.3 V, into 16 Ω with 0.1% THD+N max (1 kHz)
• Low current consumption: 2.7 mA max at 5 V
• Ultra-low standby current consumption: 10 nA typical
• High signal-to-noise ratio
• High crosstalk immunity: 102 dB (F = 1 kHz)
• PSRR: 70 dB typ. (F = 1 kHz), inputs grounded at 5 V
• Unity-gain stable
• Short-circuit protection circuitry
• Available in lead-free MiniSO-8 & DFN8 2 mm x 2 mm
• Headphone amplifiers
• Mobile phones, PDAs, computer motherboards
• High-end TVs, portable audio players

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