Datasheet

PCM5121, PCM5122
SLAS763A –AUGUST 2012–REVISED SEPTEMBER 2012 www.ti.com
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This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
OTHER KEY FEATURES
The PCM512x provides 2.1V
RMS
ground centered
• Integrated High-Performance Audio PLL With
outputs, allowing designers to eliminate DC blocking
BCK Reference To Generate SCK Internally
capacitors on the output, as well as external muting
circuits traditionally associated with single supply line
• Accepts 16-, 24-, And 32-Bit Audio Data
drivers.
• PCM Data Formats: I
2
S, Left-Justified, Right-
Justified, TDM
The integrated line driver surpasses all other charge-
pump based line drivers by supporting loads down to
• SPI or I
2
C Control
1kΩ. By supporting loads down to 1kΩ, the PCM512x
• Software or Hardware Configuration
can essentially drive up to 10 products in parallel.
• Automatic Power-Save Mode When LRCK And
(LCD TV, DVDR, AV Receivers etc).
BCK Are Deactivated
The integrated PLL on the device removes the
• 3.3V Failsafe LVCMOS Digital Inputs
requirement for a system clock (commonly known as
• Single Supply Operation:
master clock), allowing a 3-wire I
2
S connection, along
with reducing system EMI.
– 3.3V Analog, 1.8V or 3.3V Digital
In addition, the PLL is completely programmable,
• Integrated Power-On Reset
allowing the device to become the I
2
S clock master
• Small 28-pin TSSOP Package
and drive a DSP serial port as a slave. The PLL
allows a non-standard clock (up to 50MHz) to be a
APPLICATIONS
source to generate the audio-related clock (such as
24.576MHz).
• A/V Receivers
• DVD, BD Players
Intelligent clock error and PowerSense under voltage
protection utilizes a two level mute system for pop-
• HDTV Receivers
free performance. Upon clock error or system power
• Applications Requiring 2V
RMS
Audio Output
failure, the device digitally attenuates the data (or last
known good data), then mutes the analog circuit.
DESCRIPTION
Compared with existing DAC technology, the
The PCM512x devices are a family of monolithic
PCM512x family offers up to 20dB lower out-of-band
CMOS integrated circuits that include a stereo digital-
noise, reducing EMI and aliasing in downstream
to-analog converter and additional support circuitry in
amplifiers/ADCs. (from traditional 100kHz OBN
a small TSSOP package. The PCM512x uses the
measurements all the way to 3MHz).
latest generation of TI’s advanced segment-DAC
architecture to achieve excellent dynamic
The PCM512x accepts industry-standard audio data
performance and improved tolerance to clock jitter.
formats with 16- to 32-bit data. Sample rates up to
384kHz are supported.
Members of the PCM512x family integrate preset
audio processing functions with programmable
coefficients, allowing developers to change the
characteristics of the interpolation filter, speaker EQ,
dynamic range controls, and average volume control
in their products.
Table 1. Differences Between PCM512x Devices
Part Number Dynamic Range SNR THD
PCM5122 112dB 112dB –93dB
PCM5121 106dB 106dB –92dB
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Product Folder Links: PCM5121 PCM5122