Specifications

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SLAS495A− JUNE 2006 − REVISED OCTOBER 2007

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−20

−18

−16

−14

−12

−10

−8

−6

−4

−2

0 200 400 600 800 1000

f − Frequency − Hz

Gain − dB

Figure 20. Uncompensated Response For 16-Ω Load and 50-mF Decoupling Capacitor

−20

−18

−16

−14

−12

−10

−8

−6

−4

−2

200 400 600 800 1000

f − Frequency − Hz

Gain − dB

Figure 21. Frequency Response For 16-Ω Load and 50-mF Decoupling Capacitor After Gain

Compensation Using Above Set of Coefficients For Audio Effects Filter

Using the capless output configuration eliminates the need for these capacitors and removes the accompanying

high-pass filter entirely. However, this configuration does have one drawback – if the RETURN terminal of the

headphone jack (which is wired to the TSC2111 VGND pin) is ever connected to a ground that is shorted to the

TSC2111 ground pin, then the VGND amplifier enters short-circuit protection, and the audio output does not

function properly.

The TSC2111 incorporates a programmable short-circuit detection/protection function. In case of short circuit,

all analog outputs are disabled and a read only bit D1 of control register 1DH/page 2 is set. In such cases, there

are two ways to return to normal operation:

− Hardware or software reset

− Power down all the output drivers, which can be achieved by setting bits D12, D11, D 8, D7, and D6 of control

25H/page 2) to become 1. The wait time is typically less than 50 ms after which, output drivers can be

programmed as desired.