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PCM1608 датащи(PDF) 23 Page - Texas Instruments

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номер детали PCM1608
подробное описание детали  24-Bit, 192kHz Sampling, 8-Channel, Enhanced Multilevel, Delta-Sigma DIGITAL-TO-ANALOG CONVERTER
PDF  29 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

PCM1608 датащи(HTML) 23 Page - Texas Instruments

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PCM1608
23
SBAS164A
ZERO FLAG
Zero Detect Condition
Zero Detection for each output channel is independent from
the others. If the data for a given channel remains at a “0”
level for 1024 sample periods (or LRCK clock periods), a
Zero Detect condition exists for that channel.
Zero Output Flags
Given that a Zero Detect condition exists for one or more
channels, the Zero Flag pins for those channels will be set to
a logic “1” state. There are Zero Flag pins for each channel,
ZERO1 through ZERO6 (pins 1 through 6), ZERO7 (pin 30),
and ZERO8 (pin 32). In addition, all eight Zero Flags are
logically “AND”ed together, and the result provided at the
ZEROA pin (pin 48), which is set to a logic “1” state when all
channels indicate a Zero Detect condition. The Zero Flag pins
can be used to operate external mute circuits. ZERO1 through
ZERO6 can be used as status indicators for a microcontroller,
audio signal processor, or other digitally controlled functions.
The active polarity of zero flag output can be inverted by
setting the ZREV bit of Control Register 10 to “1”. The reset
default is active high output, or ZREV = 0.
APPLICATIONS INFORMATION
CONNECTION DIAGRAMS
A basic connection diagram with the necessary power-
supply bypassing and decoupling components is shown in
Figure 12. Texas Instruments recommends using the compo-
nent values shown in Figure 12 for all designs.
FIGURE 12. Basic Connection Diagram.
24
23
22
21
20
19
18
17
16
15
14
13
37
38
39
40
41
42
43
44
45
46
47
48
RST
SCKI
SCKO
BCK
LRCK
TEST
V
DD
DGND
DATA1
DATA2
DATA3
AGND3
V
CC4
AGND4
V
OUT8
AGND6
V
CC5
AGND5
V
OUT7
V
COM
V
OUT1
36
35
34
33
32
31
30
29
28
27
26
123456789
10
11
25
12
PCM1608
Micro Controller
+5V
Power Supply
10
µF
10
µF
10
µF
ZERO1–6
ZERO7, 8
Regulator
LPF
LPF
LPF
LPF
LPF
LPF
V
CC3
V
OUT2
V
OUT1
LPF
V
OUT7
LPF
V
OUT8
V
OUT2
V
OUT3
V
OUT4
V
OUT5
V
OUT6
ZEROA
ZEROA
PLL1700
ML
MC
MD
SCKO3
RST
DATA4
LRCK
DATA1
DATA2
DATA3
BCK



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