参数资料
型号: AT73C209-EK
厂商: Atmel
文件页数: 36/63页
文件大小: 0K
描述: BOARD EVAL FOR AT73C209
标准包装: 1
系列: PMAAC™
主要目的: 电源管理,专用型: 手机
已用 IC / 零件: AT73C209
已供物品: 板,CD,文档
10. Audio DAC
10.1
Description
The Audio DAC IP core includes the functions of Stereo D-to-A conversion, channel filtering,
line-in/microphone and line-out/headphone interfacing with integrated short-circuit detection.
Oversampling sigma delta technology is used in the D-to-A conversion. The channel filters are
implemented digitally, embedded in the interpolation filters associated with the converter. Stereo
single-ended interfaces are available for line-in/microphone and line-out/headphone connec-
tions. Mono differential interfaces are available for auxiliary input amplifier and PA driver. The
line-out/headphone amplifier can drive an external load of 32 Ohms with 20 mWrms. The line-
in/microphone amplifier has an input range of 70 mVrms at maximum gain. The data port is I2S
serial at 8 to 48kHz. In full power-down mode the standby current consumption is less than
10 μA.
10.2
Functional Diagram
Figure 10-1. Audio DAC Functional Diagram
avddhs
linel
PGA
ingnd
spi_csb
liner
PGA
Status
Registers
spi_din
spi_dout
spi_clk
bclk
hsl
SPKR
DRV
32
+
DAC
Volume
Control
+
Volume
Control
Digital
Filter
lrfs
Serial
Audio
Interface
mclk
sdin
hsr
SPKR
DRV
32
+
DAC
Volume
Control
+
Volume
Control
Digital
Filter
agndhs
36
AT73C209
6365A–PMAAC–12-Mar-08
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