Datasheet

Internal Reset

S Clocks

SCK, BCK, LRCK

Internal 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

PCM5121, PCM5122

SLAS763A –AUGUST 2012–REVISED SEPTEMBER 2012

www.ti.com

Recommended Output Filter for the PCM512x

The diagram in Figure 22 shows the recommended output filter for the PCM512x. The new PCM512x next-

generation current segment architecture offers excellent out-of-band noise, making a traditional 20kHz low pass

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.

Figure 22. Recommended Output Lowpass Filter for 10kΩ Operation

Reset and System Clock Functions

Power-On Reset Function

The PCM512x includes a power-on reset function shown in Figure 23. With V

> 2.8V, the power-on reset

function is enabled. After the initialization period, the PCM512x is set to its default reset state.

Figure 23. Power-On Reset Timing, DVDD = 3.3V

The PCM512x includes a power-on reset function shown in Figure 24 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 PCM512x is set to

its default reset state.

Product Folder Links: PCM5121 PCM5122