TAS5721 datasheet(61/71 Pages) TI1

61 / 71 page

DR_INx

DR_OUTx

S0490-02

OUT

TAS5721

www.ti.com

SLOS739 – JULY 2012

Shutdown Sequence

Enter:

Write 0x40 to register 0x05.

Wait at least 1 ms + 1.3 × tstop (where tstop is specified by register 0x1A).

If desired, reconfigure by returning to step 4 of initialization sequence.

Exit:

Write 0x00 to register 0x05 (exit shutdown command may not be serviced for as much as 240 ms

after trim following AVDD/DVDD powerup ramp).

Wait at least 1 ms + 1.3 × tstart (where tstart is 300 ms when mid-Z ramp is enabled and is

otherwise specified by register 0x1A).

Proceed with normal operation.

Power-Down Sequence

Use the following sequence to powerdown the device and its supplies:

If time permits, enter shutdown (sequence defined above); else, in case of sudden power loss,

assert PDN = 0 and wait at least 2 ms.

Assert RST = 0.

Drive digital inputs low and ramp down PVDD supply as follows:

•

Drive all digital inputs low after RST has been low for at least 2 µs.

•

Ramp down PVDD while ensuring that it remains above 8 V until RST has been low for at

least 2 µs.

Ramp down AVDD/DVDD while ensuring that it remains above 3 V until PVDD is below 6 V and

that it is never more than 2.5 V below the digital inputs.

USING HEADPHONE AMPLIFIER OR LINE DRIVER IN TAS5721

This device has a stereo output which can be used as a line driver or a headphone driver that can output 2-Vrms

stereo. An audio system can be set up for different applications using this device.

USING HEADPHONE AMPLIFIER IN TAS5721

The device can be represented as shown in Figure 73: analog inputs (single-ended) as DR_INA (pin 7) and

DR_INB (pin 10) with the outputs DR_OUTA (pin 8) and DR_OUTB (pin 9).

Figure 73. Headphone/Line Driver with Analog Input

DR_SD pin can be used to turn ON or OFF the headphone amplifier and line driver.

Speaker channels are independent of headphone and line driver in this mode.

Submit Documentation Feedback

Product Folder Links: TAS5721

TAS5721 Datasheet(PDF) 61 Page - Texas Instruments

TAS5721 Datasheet(HTML) 61 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71

Datasheet Download

Link URL