Datasheet
Audio Interface
8x Interpolation Filter
32bit ûModulator
Current
Segment
DAC
Current
Segment
DAC
I/V I/V
Analog
Mute
Analog
Mute
Zero
Data
Detector
UVP/Reset
PLL Clock
Power
Supply
Ch. PumpPOR
Clock Halt
Detection
Advanced Mute Control
SCK
BCK
LRCK
CAPP
CAPM
VNEG
LINE OUT
DIN (i2s)
PCM510xA
CPVDD (3.3V)
AVDD (3.3V)
DVDD (1.8V or 3.3V)
GND
PCM5100A
,
PCM5101A
,
PCM5102A
PCM5100A-Q1
,
PCM5101A-Q1
,
PCM5102A-Q1
SLAS859C –MAY 2012–REVISED MAY 2015
www.ti.com
9 Detailed Description
9.1 Overview
The integrated PLL on the device provided adds the flexibility to remove the system clock (commonly known as
master clock), allowing a 3-wire I
2
S connection and reducing system EMI.
Powersense undervoltage protection utilizes a two-level mute system. Upon clock error or system power failure,
the device digitally attenuates the data (or last known good data) and then mutes the analog circuit.
Compared with existing DAC technology, the PCM510xA devices offer up to 20 dB lower out-of-band noise,
reducing EMI and aliasing in downstream amplifiers/ADCs. (from traditional 100-kHz OBN measurements to 3
MHz).
The PCM510xA devices accept industry-standard audio data formats with 16- to 32-bit data. Sample rates up to
384 kHz are supported.
9.2 Functional Block Diagram
9.3 Feature Description
9.3.1 Terminology
Sampling frequency is symbolized by f
S
. Full scale is symbolized by FS. Sample time as a unit is symbolized by
t
S
.
9.3.2 Audio Data Interface
9.3.2.1 Audio Serial Interface
The audio interface port is a 3-wire serial port with the signals LRCK, BCK, and DIN. BCK is the serial audio bit
clock, used to clock the serial data present on DIN into the serial shift register of the audio interface. Serial data
is clocked into the PCM510xA on the rising edge of BCK. LRCK is the serial audio left/right word clock. LRCK
polarity for left/right is given by the format selected.
14 Submit Documentation Feedback Copyright © 2012–2015, Texas Instruments Incorporated
Product Folder Links: PCM5100A PCM5101A PCM5102A PCM5100A-Q1 PCM5101A-Q1 PCM5102A-Q1