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TPA6138A2 Fiches technique(PDF) 7 Page - Texas Instruments

No de pièce TPA6138A2
Description  TPA6138A2 DirectPath??Headphone Driver With Adjustable Gain
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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TPA6138A2 Fiches technique(HTML) 7 Page - Texas Instruments

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TPA6138A2
www.ti.com
SLOS704B – JANUARY 2011 – REVISED AUGUST 2015
8 Parameter Measurement Information
All parameters are measured according to the conditions described in Specifications.
9 Detailed Description
9.1 Overview
The TPA6138A2 is a DirectPath™ stereo headphone amplifier that requires no output DC blocking capacitors
and is capable of delivering 25m-W into a 32-
Ω load. The device has built-in pop suppression circuitry to
completely eliminate pop noise during turn- on and turn-off. The amplifier outputs have short-circuit protection.
The TPA6138A2 features fully differential inputs to reduce system noise pickup between the audio source and
the headphone amplifier. The high power supply noise rejection performance and differential architecture
provides increased RF noise immunity.
The TPA6138A2 gain is controlled by external resistors Rin and Rfb, see the Gain-Setting Resistor Ranges
section for recommended values.
The TPA6138A2 operates from a single 3-V to 3.6-V supply, as it uses a built-in charge pump to generate a
negative voltage supply for the headphone amplifiers.
The TPA6138A2 features an external undervoltage protection which must be set according to TPA6138A2 UVP
Operation.
The TPA6138A2 can also be used as a standard operational amplifier (op amp), this makes possible to configure
the device as a second-order low-pass filter to remove out-of-band noise.
Copyright © 2011–2015, Texas Instruments Incorporated
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