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PCM1774RGPRG4 Datasheet(PDF) 41 Page - Texas Instruments

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Part # PCM1774RGPRG4
Description  16-Bit, Low-Power Stereo Audio DAC With Analog Mixing, Line and Headphone Outputs
PDF  49 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCM1774RGPRG4 Datasheet(HTML) 41 Page - Texas Instruments

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PCM1774
SLAS551 – JULY 2007
Register 125
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 125
0
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
00
450
750
1 1100
11
900
1500
10
1 1000
Do not set.
–
–
1 0000
Do not set.
–
–
1 1110
01
250
400
1 1100
00
450
750
Default
4.7
1 1000
11
900
1500
1 0000
Do not set.
–
–
1 1110
10
100
300
1 1100
01
250
400
2.2
1 1000
00
450
750
1 0000
11
900
1500
1 1110
Do not set.
–
–
1 1100
10
100
300
1
1 1000
01
250
400
1 0000
00
450
750
41
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