Texas Instruments TA 52 Series Application Note

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Application Note
Headset Detection for TAx52xx Family
Arash Loloee
A common feature in most of today's electronic devices - including cell phone, PDAs, notebooks, handheld
media players, game systems, and so on, is the provision for connecting to external accessories. The devices
therefore include dedicated logic circuitry that can detect not only the presence of an accessory, but also the
type.
The TAx5x1x includes extensive capability to monitor a headphone, microphone (mic), or headset jack,
determine if an audio plug has been inserted, and then detect what type of headset is wired to the plug. This
application note mainly discusses the headset detection scheme for two different headset output configurations:
pseudo-differential (capacitor-less) output, and ac-coupled output. The content of this document applies to
the TAD5212, TAD5112, TAC5212, TAC5112, TAC5211, TAC5111, TAD5212-Q1, TAD5112-Q1, TAC5212-Q1,
TAC5112-Q1, and TAC5111-Q1
1 Headset Plugs and Connection
1.1 Part I: Pseudo-Differential (Capacitor-less) Headset Output Configuration.......................................................................
1.2 Part II: AC-Coupled Stereo Headset Output Configuration - Capacitor Interface.............................................................
2 Example for a Pseudo-Differential (Capacitor-less) Output
3 Example for an AC-Coupled (Capacitor) Output Configuration.......................................................................................
4 Flowchart for Pseudo-Differential (Capacitor-less) Output
5 Flowchart for AC-Coupled (Capacitor) Output Configuration..........................................................................................
6 Summary...............................................................................................................................................................................
7 References............................................................................................................................................................................
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SLAAEG7 - APRIL 2024
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ABSTRACT

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Diagrams............................................................................................................................2
Copyright © 2024 Texas Instruments Incorporated
Configuration.....................................................................10
Configuration......................................................................12
Headset Detection for TAx52xx Family
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