STEVAL-CCA018V1 [STMICROELECTRONICS]
Single-supply stereo digital audio line driver based on the TS4657; 基于TS4657单电源立体声数字音频线驱动
| 型号： | STEVAL-CCA018V1 |
| 厂家： | 
ST |
| 描述： | Single-supply stereo digital audio line driver based on the TS4657 |
| 文件： | 总4页 (文件大小：136K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
STEVAL-CCA018V1
Single-supply stereo
digital audio line driver based on the TS4657
Data brief
Features
■ Power supply range: 3 V to 5.5 V
■ Audio line output: 2.2 V
for entire V
CC
RMS
range
■ 16 to 24-bit audio data format stereo DAC, 32
to 48 kHz sample rate
2
■ I S, right or left justified compatible digital
audio interface
■ 95 dB SNR A-weighted at 48 kHz, V = 5 V
CC
■ 7.4 mA current consumption at V = 3 V, full
CC
operation
■ Internal negative power supply to ensure
ground-referenced, cap-less outputs
■ No external capacitor needed for the negative
The digital audio data can be 16 to 24-bits long
and sample rates from 32 to 48 kHz are
supported.
power supply generation
■ Integrated structure to suppress pop and click
noise
The output stage signal is ground-referenced by
using an internal self-generated negative power
supply, so bulky external output coupling
capacitors are not necessary.
■ Standby mode active low
■ RoHS compliant
Description
The STEVAL-CCA018V1 demonstration board is
designed provide a platform for evaluating the
performance of the TS4657 stereo digital-to
analog-converter (DAC). The TS4657 integrates a
high-performance audio line driver capable of
generating a 2.2 V
output level from a single
RMS
3.0 to 5.5 V supply.
A single supply is sufficient for the digital and
analog parts of the circuit, eliminating the need for
external regulators.
The TS4657 is a low consumption device, with
only 22 mW of power dissipation at 3.0 V power
supply during full operation.
A 16-bit multi-bit sigma-delta DAC is used,
operating at 256xFs with over sampling digital
interpolation filters.
October 2009
Doc ID 16593 Rev 1
1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Schematic diagram
STEVAL-CCA018V1
1
Schematic diagram
Figure 1.
Circuit schematic
VCCD VCCA
C2
C3
1uF
1uF
3v to 5V5
VCC
GND
VCCA VCCD
10uF/6V3
C4
C5
C1
1uF
1uF
J5
IC1
C6
2nF2
JP4
J6
820
R5
SIP2
OUT L
3
4
5
6
LRCLK
SDAT
BCLK
MCLK
JP5
J4
J2
LRCLK
SDAT J3
BCLK
Digital
Filters
and
12
11
VOUTL
VOUTR
Digital
Audio
Digital Input
JP7
DACs
Interface
MCLK J1
OUT R
R7
820
J7
SIL2
JP6
Control
TS4657
C7
Interface
2nF2
Output Filters
Epad
VCCD
JP1
JP2
JP3
Format1 Format2
User Control
/Stdby
2/4
Doc ID 16593 Rev 1
STEVAL-CCA018V1
Revision history
2
Revision history
Table 1.
Date
29-Oct-2009
Document revision history
Revision
Changes
1
Initial release.
Doc ID 16593 Rev 1
3/4
STEVAL-CCA018V1
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Doc ID 16593 Rev 1
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