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參數(shù)資料
| 型號： | PCM1717E |
| 英文描述： | Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 立體聲音頻數(shù)字模擬轉換器 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大?。?/td> | 126K |
| 代理商： | PCM1717E |
9
PCM1717
IZD = 1
IZD = 0
RSTB = “HIGH”
RSTB = “LOW”
SOFTWARE MODE
INPUT
DATA INPUT
DAC OUTPUT
Zero
Other
Zero
Other
Forced to BPZ
(1)
Forced to BPZ
(1)
Controlled by IZD
Normal
Enabled
Enabled
Enabled
Enabled
DATA INPUT
DAC OUTPUT
Zero
Other
Zero
Other
Forced to BPZ
(1)
Normal
Zero
(2)
Normal
Bits 3 (OPE) and 4 (IZD) are used to control the infinite zero
detection features. Tables II through IV illustrate the rela-
tionship between IZD, OPE, and RSTB (reset control):
ATTENUATION DATA LOAD CONTROL
Bit 8 (LDL) is used to control the loading of attenuation data
in B0:B7. When LDL is set to 0, attenuation data will be
loaded into AL0:AL7, but it will not affect the attenuation
level until LDL is set to 1. LDR in Register 1 has the same
function for right channel attenuation. The attenuation level
is given by:
ATT = 20log (y/256) (dB), where y = x, when
0 ≤
x
≤
254
y = x + 1, when x = 255
X is the user-determined step number, an integer value
between 0 and 255.
Example:
let x = 255
255
+
1
let x = 254
let x = 1
let x = 0
REGISTER 1
TABLE II. Infinite Zero Detection (IZD) Function.
OPE = 1
OPE = 0
TABLE III. Output Enable (OPE) Function.
SOFTWARE
MODE
INPUT
DATA INPUT
DAC OUTPUT
Zero
Other
Zero
Other
Controlled by OPE and IZD
Controlled by OPE and IZD
Forced to BPZ
(1)
Forced to BPZ
(1)
Enabled
Enabled
Disabled
Disabled
TABLE IV. Reset (RSTB) Function.
NOTE: (1)
∑
is disconnected from output amplifier. (2)
∑
is connected to
output amplifier.
OPE controls the operation of the DAC: when OPE is
“LOW”, the DAC will convert all non-zero input data. If the
input data is continuously zero for 65,536 cycles of BCKIN,
the output will only be forced to zero only if IZD is “HIGH”.
When OPE is “HIGH”, the output of the DAC will be forced
to bipolar zero, irrespective of any input data.
IZD controls the operation of the zero detect feature: when
IZD is “LOW”, the zero detect circuit is off. Under this
condition, no automatic muting will occur if the input is
continuously zero. When IZD is “HIGH”, the zero detect
feature is enabled. If the input data is continuously zero for
65,536 cycle of BCKIN, the output will be immediately
forced to a bipolar zero state (V
CC
/2). The zero detection
feature is used to avoid noise which may occur when the
input is DC. When the output is forced to bipolar zero, there
may be an audible click. PCM1717 allows the zero detect
feature to be disabled so the user can implement an external
muting circuit.
REGISTER 3
B15 B14 B13 B12 B11 B10 B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
res
res
res
res
res A1
A0 res PL3 PL2 PL1 PL0 ATC
IW
LRP
IIS
Register 3 is used to select the I/O data formats. Bit 0 (IIS)
is used to control the input data format. If the input data
source is normal (16- or 18-bit, MSB first, right-justified),
set bit 0 “LOW”. If the input format is IIS, set bit 0 “HIGH”.
ATT
=
20log
0
256
–
∞
ATT
=
20log
1
256
–48.16dB
ATT
=
20log
254
256
–0.068dB
ATT
=
20log
256
0dB
B15 B14 B13 B12 B11 B10 B9 B8
B7
B6
B5
B4
B3
B2
B1
B0
res res res res res
A1 A0
LDR
AR7AR6 AR5AR4AR3 AR2AR1AR0
Register 1 is used to control right channel attenuation. As
in Register 1, bits 0-7 (AR0-AR7) control the level of
attenuation.
REGISTER 2
B15 B14 B13 B12 B11 B10 B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
res
res res
res
res A1
A0 res
res
res res IZD OPE DM1 DM0 MUTE
Register 2 is used to control soft mute, digital de-emphasis,
disable, and infinite zero detect. Bit 0 is used for soft mute;
a HIGH level on bit 0 will cause the output to be muted.
Bits 1 and 2 are used to control digital de-emphasis as
shown below:
BIT 1 (DM0)
BIT 2 (DM1)
DE-EMPHASIS
0
1
0
1
0
0
1
1
De-emphasis disabled
De-emphasis enabled at 48kHz
De-emphasis enabled at 44.1kHz
De-emphasis enabled at 32kHz
相關PDF資料 |
PDF描述 |
|---|---|
| PCM1718 | Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM1718E | Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM1719 | Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM1719E | Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM1720 | Stereo Audio DIGITAL-TO-ANALOG CONVERTER MPEG2/AC-3 COMPATIBLE |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PCM1717E/2K | 功能描述:音頻數(shù)/模轉換器 IC SoundPlus Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1717E/2KG4 | 功能描述:音頻數(shù)/模轉換器 IC SoundPlus Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1717EG | 功能描述:音頻數(shù)/模轉換器 IC SoundPlus Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1717EG4 | 功能描述:音頻數(shù)/模轉換器 IC SoundPlus Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1717EGE6 | 功能描述:音頻數(shù)/模轉換器 IC SoundPlus Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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