TAS2553_15 datasheet(46/58 Pages) TI

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0.01

0.1

100

0.001

0.01

0.1

PO - Output Power - W

VBAT = 5.5 V

VBAT = 5.0 V

VBAT = 4.2 V

VBAT = 3.6 V

VBAT = 3.0 V

C006

0.001

0.01

0.1

200

2000

20000

f - Frequency - Hz

VBAT = 5.5 V

VBAT = 5.0 V

VBAT = 4.2 V

VBAT = 3.6 V

VBAT = 3.0 V

C007

Device Analog Input

Signal Connector

Rin

TAS2553

SLAS978B – SEPTEMBER 2013 – REVISED FEBRUARY 2014

www.ti.com

Figure 57. Analog Input Connection

For high fidelity audio playback, it is desirable to keep the cutoff frequency of the high pass filter below the

minimum reproducible frequency of the speaker. For example, a 1 µF capacitor connected to the differential

analog inputs with input resistance 10 k

Ω results in a cutoff frequency of 16 Hz.

8.2.2.3 Application Performance Plots

AGC=OFF, Gain = 15 dB, f = 1 kHz

AGC=OFF, Gain = 15 dB

Figure 58. THD+N vs Output Power (8

Ω) for Analog Input

Figure 59. THD+N vs Frequency (8

Ω) for Analog Input

8.3 Initialization

To configure the TAS2553, follow these steps.

1. Bring-up the power supplies as in Power Supply Sequencing.

2. Set the EN terminal to HIGH.

3. Configure the registers in the sequence below. Do not set the bits in the final two steps to zero anytime

before the end of the sequence.

–

Configure device register

–

...

–

...

–

...

–

Configure device register

–

Set Register 0x0D D[7:0] = 0xA9

–

Set Register 0x0E D[5] = 1

–

Set Register 0x02 D[0] = 0

–

Set Register 0x01 D[1] = 0

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