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參數(shù)資料
| 型號： | DEM-DAI1710 |
| 英文描述： | DEM-DAI1710 - EVALUTION FIXTURE |
| 中文描述： | DEM的DAI1710 - EVALUTION夾具 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大?。?/td> | 194K |
| 代理商： | DEM-DAI1710 |
3
DEM-DAI
AUDIO INPUTS AND OUTPUTS
Analog-to-digital converter (ADC) and digital-to-analog
converter (DAC) analog audio connections are made via
RCA connectors, and can be sourced or measured using an
analyzer, such as the Audio Precision System One or Two.
The RCA jacks also provide simple interconnection with
consumer and professional audio systems.
ON-BOARD DAC POST FILTER
The DEM-DAI board includes an on-board DAC post filter.
This is a second-order lowpass active filter configured in a
multiple feedback arrangement. The filter is comprised of op
amp U11 and its associated circuitry. The OPA2134 dual op
amp is the recommended device for U11.
CONFIGURATION CONTROLS
The DEM-DAI board includes a number of switches and
jumpers which are used to configure the digital audio inter-
face and clocks. See the section entitled “Setting the Con-
figuration Controls” for details on configuring DEM-DAI
board options.
POWER SUPPLIES
Power supply connections for both the digital audio interface
and DAC post filter circuit are provided using connector CN1.
DEMO BOARD INTERFACE
DEM-PCM demo boards which are compatible with the
DEM-DAI board are connected using headers CN2 through
CN5.
CN2 provides the connection to the system clock and the
audio serial port interface.
CN3 connects the left and right DAC outputs to the on-board
post filter, with the output of the filters connected to RCA
jacks J3 and J4.
CN4 connects the left and right ADC inputs to the J5 and J6
RCA jacks.
CN5 connects to the +V
CC
power supply and ground.
SETTING THE CONFIGURATION
CONTROLS
This section describes the controls used to set the configu-
ration of the DEM-DAI board.
MODE SWITCHES
Switches SW1, SW2, and SW3 are used to set the output
data format generated by the digital audio receiver. Table I
shows the switch settings and the corresponding format
selections. Figures 2a through 2d show the LRCK, BCK,
and output data (DATAIN) waveforms for each format. The
PCM device format selection, made through either hardware
or software controls on the corresponding DEM-PCM demo
board, must match the format selection made with switches
SW1 through SW3.
Switches SW4, SW5, and SW6 are used to set the input data
format required for the digital audio transmitter. Table II
shows the switch settings and the corresponding format
selections. Figures 3a through 3d show the LRCK, BCK,
and input data (DATAOUT) waveforms for each format. The
PCM device format selection, made through either hardware
or software controls on the corresponding DEM-PCM demo
board, must match the format selection made with switches
SW4 through SW6.
SW3 (M2)
SW2 (M1)
SW1 (M0)
FORMAT
L
L
H
H
L
H
L
H
L
L
H
L
16-Bit to 24-Bit, Left-Justified
I
2
S
16-Bit, MSB-First, Right-Justified
18-Bit, MSB-First, Right-Justified
TABLE I. Digital Audio Receiver Output Data Format.
SW6 (M2)
SW5 (M1)
SW4 (M0)
FORMAT
L
H
H
H
L
L
L
H
H
L
H
L
16-Bit to 24-Bit, Left-Justified
I
2
S
16-Bit, MSB-First, Right-Justified
18-Bit, MSB-First, Right-Justified
TABLE II. Digital Audio Transmitter Input Data Format.
When using the DEM-DAI board to test PCM DACs and the
transmitter is not in use, it is recommended that switches
SW4, SW5, and SW6 be set to match the settings of SW1,
SW2, and SW3 to ensure proper DEM-DAI board operation.
Switch SW7 is used to select Master or Slave mode for
devices which support them. In Master mode, the PCM
device generates LRCK and BCK. In Slave mode, the LRCK
and BCK are generated by either the digital audio receiver or
the crystal oscillator/divider circuit, and is then provided to
the corresponding PCM device. The Master/Slave mode
selection on the DEM-PCM demo board must correspond
directly to the selection made with SW7. Table III shows the
switch settings and corresponding mode selections.
SW7
MODE
SLAVE
Slave Mode:
LRCK and BCK generated by DIR or crystal
oscillator/divider.
Master Mode: LRCK and BCK generated by PCM device.
MASTER
TABLE III. Master/Slave Mode Selection.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DEM-DDC101P-C | DEM-DDC101P-C - DISCONTINUED PRODUCT. No longer recommended for new design. |
| DEM-DDC112U-C | DEM-DDC112U-C - Evaluation Fixture |
| DEM-DSP102 | DEM-DSP102 - DISCONTINUED PRODUCT. No longer recommended for new design. |
| DEM-OPA68XU | EVALUATION FIXTURE |
| DEM-PCM1702 | DEM-PCM1702 - EVALUATION FIXTURE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DEM-DAI1716-1 | 制造商:Texas Instruments 功能描述:DEMO BOARD - Bulk |
| DEM-DAI1717 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| DEM-DAI1718 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| DEM-DAI1725 | 功能描述:音頻 IC 開發(fā)工具 Demo Bd w/ Dig Aud Interface RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| DEM-DAI1728 | 制造商:Texas Instruments 功能描述:EVAL KIT, INCLUDING THE DEM-PCM1728 AND THE DEMDAI BD - Bulk |
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