PCM5310PAP datasheet(22/103 Pages) TI

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POWER-SUPPLY SEQUENCE AND POWER ON/OFF SEQUENCE

VDD,VCCP,

VCCAD,VCCDA

VCCH(9V)

I CRegisterSetting

AnalogOutput

(1)

DigitalOutput

75msto2000ms

(2)

37.5msto1000ms

Halfof

Power-Supply

Voltage

Recommended

Power-On

Sequence

Recommended

Power-Off

Sequence

PCM5310

SLES244 – FEBRUARY 2009 ............................................................................................................................................................................................ www.ti.com

In order to reduce audible pop noise, a register setting sequence is required after turning on all power supplies

and before turning off all power supplies. Any modules that are not used in the application or system should be

powered down after the recommended power-on sequence. Before the power-off sequence, all modules should

be in a power-on state. The recommended power-supply sequence is shown in Figure 32. The recommended

(1)

Ramp up/down time for the analog output can be changed through the register setting (see Register 18, PDTM[2:0]).

(2)

A 1.0-

µF capacitor should be connected to the VCOMAD and VCOMDA pins.

Figure 32. Recommended Power On/Off Sequence

Table 8. Recommended Register Settings When Powered On

STEP

ADDRESS

DATA

DESCRIPTION

—

Turn on all power supplies

Analog bias power up

Headphone output L-channel mute disable and level (–42 dB) setting(1)

Headphone output R-channel mute disable and level (–42 dB) setting(1)

Headphone volume update control

Line output gain (0 dB) control from DAC(1)

Line output 2 VRMS and 2.4 VRMS mode select

DAC12 L-channel digital attenuation level (0 dB) setting(1)

DAC12 R-channel digital attenuation level (0 dB) setting(1)

DAC12 digital mute setting and digital gain boost

DAC12 digital attenuation/mute control and zero crossing enable

DAC34 L-channel digital attenuation level (0 dB) setting(1)

DAC34 R-channel digital attenuation level (0 dB) setting(1)

DAC34 digital mute setting and digital gain (0 dB) boost

DAC34 digital attenuation/mute control and zero crossing enable

ADC12 L-channel digital attenuation level (0 dB) setting(1)

ADC12 R-channel digital attenuation level (0 dB) setting(1)

(1)

Any level is acceptable for volume, gain, and attenuation. The level should be resumed by register data recorded when the system

powers off.

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