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MD8837L-K08-2020-R Datasheet(PDF) 1 Page - Unisonic Technologies |
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MD8837L-K08-2020-R Datasheet(HTML) 1 Page - Unisonic Technologies |
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1 / 7 page  UNI SONI C TECHNOLOGI ES CO., LTD PA3138 CMOS IC www.unisonic.com.tw 1 of 8 Copyright © 2017 Unisonic Technologies Co., Ltd QW-R107-074.B DI RECT H EADPH ON E DRI V ER WI T H ADJ U ST ABLE GAI N DESCRI PT I ON The UTC PA3138 is a pop-free stereo headphone amplifier with the integrated charge pump generating the negative supply rail which allows the removal of the output DC-blocking capacitors. The UTC PA3138 provides a clean, pop-free ground-biased audio signal. The UTC PA3138 is capable of driving 25mW into a 32- Ω load with 3.3-V supply voltage. The device has differential inputs and uses external resistors for flexible gain setting. Gain can be configured individually for each channel. The device can also be configured as a second-order low-pass filter and is ideal for interfacing with PWM audio sources. The UTC PA3138 has built-in active-mute control for pop-free audio on/off control. The UTC PA3138 has an external under-voltage detector that mutes the output when monitored voltage drop below set value. Using the UTC PA3138 in audio products can reduce component count considerably compared to traditional headphone amplifiers. FEAT U RES * Low THD+N<0.01% at 10mW Into 32 Ω * Stereo Direct Headphone Amplifier driver 40 mW Into 32 Ω With 3.3-V Supply * Integrated charge pump Generates Negative Supply Rail * High SNR, >90dB * Ground-Referenced Outputs Eliminate DC-Blocking Capacitors * Differential Input and Single-Ended Output * Adjustable Gain by External Gain-Setting Resistors * Pop-Free Under-Voltage Protection * Configurable as a Second-Order Low-Pass Filter Ideal for PWM Audio Sources * Short-Circuit Protection * Click- and Pop-Reduction Circuitry * Active Mute Control for Pop-Free Audio On/Off Control ORDERI N G I N FORM AT I ON Ordering Number Lead Free Halogen Free Package Packing PA3138L-P14-R PA3138G-P14-R TSSOP-14 Tape Reel |
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