Texas Instruments PCM5142 Evaluation Module PCM5142EVM-U PCM5142EVM-U 데이터 시트
제품 코드
PCM5142EVM-U
Internal Reset
I
2
S Clocks
SCK, BCK, LRCK
I nternal Reset
4 ms
Reset Removal
2.8V
3.3V
AVDD, DVDD,
CPVDD
PCM510x
OUTL
OUTR
470Ω
2.2nF
LINE
OUT
470Ω
2. 2nF
Output voltage is 2 VRMS
With a 10 kΩ Load
SLAS759A – AUGUST 2012 – REVISED SEPTEMBER 2012
Recommended Output Filter for the PCM514x
The diagram in
shows the recommended output filter for the PCM514x. The new PCM514x next-
generation current segment architecture offers excellent out-of-band noise, making a traditional 20kHz low pass
filter a thing of the past.
filter a thing of the past.
The RC settings below offer a -3dB filter point at 153kHz (approx), giving the DAC the ability to reproduce
virtually all frequencies through to it’s maximum sampling rate of 384kHz.
virtually all frequencies through to it’s maximum sampling rate of 384kHz.
Figure 22. Recommended Output Lowpass Filter for 10k
Ω
Operation
Reset and System Clock Functions
Power-On Reset Function
The PCM514x includes a power-on reset function shown in
. With V
DD
> 2.8V, the power-on reset
function is enabled. After the initialization period, the PCM514x is set to its default reset state.
Figure 23. Power-On Reset Timing, DVDD = 3.3V
The PCM514x includes a power-on reset function shown in
operating at DVDD=1.8V. With AVDD
greater than approximately 2.8V, and PVDD greater than approximately 2.8V, and DVDD greater than
approximately 1.5V, the power-on reset function is enabled. After the initialization period, the PCM514x is set to
its default reset state.
approximately 1.5V, the power-on reset function is enabled. After the initialization period, the PCM514x is set to
its default reset state.
20
Copyright © 2012, Texas Instruments Incorporated
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