TS488 Datasheet Pop-free 120 mW stereo headphone amplifier Features Pop and click noise protection circuitry Operating range from VCC = 2.2 V to 5.5 V Standby mode active low Output power: 120 mW at 5 V, into 16 with 0.1% THD+N max. (1 kHz) 55 mW at 3.3 V, into 16 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 DFN8 2x2 mm Applications Headphone amplifiers Mobile phones, PDAs, computer motherboards Product status link High-end TVs, portable audio players TS488 Product summary Description Order code TS488IQT The TS488 is a dual audio power amplifier capable of driving, in single-ended mode, either a 16 or a 32 stereo headset. Temperature -40 to +85 C range The TS488 eliminates pop and click noise and reduces the number of required external passive components. Package DFN8 2x2 mm Capable of descending to low voltages, it delivers up to 31 mW per channel (into 16 Packing Tape and reel loads) of continuous average power with 0.1% THD+N in the audio bandwidth from Marking K88 a 2.5 V power supply. An externally-controlled standby mode reduces the supply current to 10 nA (typ.). The unity gain stable is configured by external gain-setting resistors. DS4579 - Rev 8 - May 2020 www.st.com For further information contact your local STMicroelectronics sales office.TS488 Typical application schematic 1 Typical application schematic Figure 1. Typical application for the TS488 Stdby active low 1 3 2 6 4 TS488=stdby 8 7 5 Table 1. Application component information Component Functional description Inverting input resistor that sets the closed loop gain in conjunction with R . feed R in1,2 This resistor also forms a high pass filter with C F = 1 / (2 x Pi x R x C ) in c in in C Input coupling capacitor that blocks the DC voltage at the amplifier input terminal in1,2 Feedback resistor that sets the closed loop gain in conjunction with R . in R feed1,2 A = closed loop gain= -R /R V feed in C Supply output capacitor that provides power supply filtering s C Bypass capacitor that provides half supply filtering b Output coupling capacitor that blocks the DC voltage at the load input terminal. C out1,2 This capacitor also forms a high pass with RL F = 1 / (2 x Pi x RL x C ) c out DS4579 - Rev 8 page 2/32