PCM1774 datasheet(41/49 Pages) TI

номер детали	PCM1774

подробное описание детали	16-Bit, Low-Power Stereo Audio DAC With Analog Mixing, Line and Headphone Outputs

PDF	49 Pages

Scroll/Zoom	100%

производитель	TI [Texas Instruments]

домашняя страница	http://www.ti.com

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PCM1774

SLAS551 – JULY 2007

B15

B14

B13

B12

B11

B10

IDX6

IDX5

IDX4

IDX3

IDX2

IDX1

IDX0

RSV

PTM1

PTM0

RES4

RES3

RES2

RES1

RES0

IDX[6:0]: 111 1101b (7Dh): Register 125

PTM[1:0]: Power-Up/Down Time Control

Default value: 00

RES[4:0]: Resister Value Control

Default value: 1 1100

These bits are used to optimize audible pop noise and ramp up time for headphone output at device power

on/off.

Table 11. Power Up/Down Time Control

RES[1:0]

VCOM REGISTER VALUE

1 0000

60 k

Ω

1 1000

24 k

Ω

1 1100

12 k

Ω

1 1110

6 k

Ω

Others

Reserved

VCOM CAPACITOR

POWER-UP TIME

POWER-DOWN

RES[4:0]

PTM[1:0]

NOTE

[

μF]

[ms]

TIME [ms]

1 1110

450

750

1 1100

900

1500

1 1000

Do not set.

–

1 0000

Do not set.

–

1 1110

250

400

1 1100

450

750

Default

4.7

1 1000

900

1500

1 0000

Do not set.

–

1 1110

100

300

1 1100

250

400

2.2

1 1000

450

750

1 0000

900

1500

1 1110

Do not set.

–

1 1100

100

300

1 1000

250

400

1 0000

450

750

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