TAS2120 datasheet(31/63 Pages) TI

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VSUP (V)

BOP_TH

Brown

Out

LIM_TH_MAX

slope

LIM_INF_PT

Inflection

Point

Figure 6-7. Limiter with Inflection Point

To achieve a limiter that tracks the selected supply below a threshold, configure the limiter as explained in the

previous example, except program the LIM_TH_MIN[23:0] register to the desired minimum threshold. This is

shown in Figure 6-8 below.

VSUP (V)

BOP_TH

Brown

Out

LIM_TH_MAX

slope

LIM_INF_PT

Inflection

Point

LIM_TH_MIN

Figure 6-8. Limiter with Inflection Point and Minimum Threshold

The limiter has a configurable attack rate (dB/Sample), hold time ( no of samples) and release rate (db/Sample),

which are available via the LIM_ATK_RATE[23:0], LIM_HLD_COUNT[23:0], LIM_RLS_RATE[23:0] register bits.

6.4.2.5 Tone Generator

TAS2120 can generate internally a sine tone using an integrated tone generator. This feature can be enabled

by configuring the register bit INTERNAL_TONE_GEN_ENZ to low. The tone signal will start playing back on

the output by configuring the INTERNAL_TONE_PLAYBACK_EN bit high. When set high, the device will start

generating a sine tone based on the programmed TONE_GEN_CNTRL_xx registers. The tone generator can

generate any frequency from 16Hz to a maximum frequency of 0.45*Fs, where Fs is the sampling rate of the

input digital clocks. The amplitude of the tone signal can also be controlled using the TONE_GEN_CNTRL_xx

registers. It is recommended to program the tone frequency and amplitude using the PPC3 Software.

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TAS2120

SLASFC6 – AUGUST 2024

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TAS2120 Datasheet(PDF) 31 Page - Texas Instruments