TPA6141A2中文资料32mW 立体声模拟输入耳机放大器数据手册TI规格书

描述 Description

The TPA6141A2 (also known as TPA6141) is a Class-G DirectPath stereo headphone amplifier with selectable gain. Class-G technology maximizes batterylife by adjusting the voltage supplies of the headphone amplifier based on the audio signal level. At low level audio signals, the internal supply voltage is reduced to minimize power dissipation. DirectPathTM technology eliminates external DC-blocking capacitors. The device features fully differential inputs with an integrated low pass filter to reduce system noise pickup between the audio source and the headphone amplifier and to reduce DAC out-of-band noise. The high power supply noise rejection performance and differential architecture provides increased RF noise immunity. For single-ended input signals, connect INL+ and INR+ to ground. The device operates from a 2.5 V to 5.5 V supply voltage. Class-G operation keeps total supply current below 5.0 mA while delivering500 µW per channel into 32 . Shutdown mode reduces the supply current to less than 3 µA and is activated through the EN pin. The device has built-in pop suppression circuitry to completely eliminate disturbing pop noise during turn-on and turn-off. The amplifier outputs haveshort-circuit and thermal-overload protection along with ±8 kV HBM ESD protection, simplifying end equipment compliance to the IEC 61000-4-2 ESD standard.

特性 Features

• TI Class-G Technology Significantly Prolongs Battery Life and Music Playback Time
• 50% to 80% Lower Quiescent Current Than Ground-Referenced Class-AB Headphone Amplifiers
• DirectPathTM Technology Eliminates Large Output DC-Blocking Capacitors
• Improves Low Frequency Audio Fidelity
• Active Click and Pop Suppression
• Also Configurable as Single-Ended Inputs
• SGND Pin Eliminates Ground Loop Noise
• 100 dB Power Supply Noise Rejection
• Gain Settings: 0 dB and 6dB
• Thermal-Overload Protection
• 0,4 mm Pitch, 1,6 mm × 1,6 mm 16-Bump WCSP (YFF) Package
• Cellular Phones / Music Phones
• Portable Media / MP3 Players
• Portable CD / DVD Players