PCM5121_16 Datasheet, PDF (1/120 Pages) Texas Instruments – Audio Stereo DAC

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PCM5121, PCM5122
SLAS763B – AUGUST 2012 – REVISED JANUARY 2016
PCM512x 2-V_RMS DirectPath™, 112/106-dB Audio Stereo DAC With 32-bit,
384-kHz PCM Interface
1 Features
•1 Register-Selectable Audio-Processing Functions
up to 48-kHz f_S
– Dynamic Range Control (DRC)
– Equalization (EQ)
– Filtering
• DAC Functionality to 384-kHz f_S
• Market-Leading Low Out-of-Band Noise
• Selectable Digital-Filter Latency and Performance
• No DC-Blocking Capacitors Required
• Integrated Negative Charge Pump
• Intelligent Muting System; Soft Up or Down Ramp
and Analog Mute for 120-dB Mute SNR
• Integrated High-Performance Audio PLL With
BCK Reference to Generate SCK Internally
• Accepts 16-, 20-, 24-, and 32-Bit Audio Data
• PCM Data Formats: I²S, Left-Justified, Right-
Justified, TDM / DSP
• SPI or I²C Control
• Software or Hardware Configuration
• Automatic Power-Save Mode When LRCK and
BCK are Deactivated
• 1.8-V or 3.3-V Failsafe LVCMOS Digital Inputs
• Single Supply Operation:
– 3.3-V Analog, 1.8-V or 3.3-V Digital
• Integrated Power-On Reset
• Small28-Pin Package
2 Applications
3 Description
The PCM512x devices are a family of monolithic
CMOS-integrated circuits that include a stereo digital-
to-analog converter and additional support circuitry in
a small TSSOP package. The PCM512x uses the
latest generation of TI’s advanced segment-DAC
architecture to achieve excellent dynamic
performance and improved tolerance to clock jitter.
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.
The PCM512x provides 2.1-V_RMS ground-centered
outputs, allowing designers to eliminate DC-blocking
capacitors on the output, as well as external muting
circuits traditionally associated with single supply line
drivers.
The integrated line driver surpasses all other charge-
pump-based line drivers by supporting loads down to
1 kΩ. By supporting loads down to 1 kΩ, the
PCM512x can essentially drive up to 10 products in
parallel (LCD TV, DVDR, AV receivers, and so forth).
The integrated PLL on the device removes the
requirement for a system clock (commonly known as
master clock), allowing a 3-wire I²S connection, along
with reducing system EMI.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
PCM5121
PCM5122
TSSOP (28)
9.7 mm × 4.4 mm
• A/V Receivers
• DVD, BD Players
• HDTV Receivers
• Applications Requiring 2-V_RMS Audio Output
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified System Diagram
2ch Single Ended
PCM1863/5
IN
AUX
2ch Single Ended
I2S
BCK
LRCK
Audio
Processing
Blocks,
Filters
DOUT
Current Segment DAC
PCM512x
TPA3130
TPA6120A2
Analog
Sensor
- Light Intensity
- Ultrasonic
- Battery Level
BT Module
MSP430
WiLAN chip
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.