Texas Instruments ADC3140EVM-PDK, User Manual

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MUX
USB
Optical Inp ut
Stereo An alog
Input
Exte rnal ASI Hea der
Sou rce
Sele ctor
(SW2)
Aud io
Pro cessor
PCM921 1 Optical Output
To EVM
www.ti.com
Introduction
3 SBAU335 – May 2019
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Copyright © 2019, Texas Instruments Incorporated
ADCx140EVM-PDK
1 Introduction
The ADCx140EVM-PDK is an evaluation module (EVM) designed to demonstrate the performance and
functionality of the TLV320ADCx140 family of devices. This family includes the devices shown in
Table 1
with differences in performance and function noted.
Table 1. TLV320ADCx140 Family
Device SNR Without DRE (dB) SNR With DRE (dB)
TLV320ADC3140 106 N/A
TLV320ADC5140 108 120
TLV320ADC6140 112 123
2 Hardware Overview
The evaluation kit consists of the TLV320ADCx140EVB daughterboard and the AC-MB motherboard. The
motherboard is used to provide power, control, and digital audio signals to the evaluation module. The
daughterboard contains the TLV320ADCx140 device and its input connections. A detailed functional
overview of the TLV320ADCx140EVB system is described in
Section 5 .
2.1 AC-MB Settings
2.1.1 Audio Serial Interface Settings
The AC-MB provides the digital audio digital signals to the evaluation module from the universal serial bus
(USB), optical, stereo jack, and external audio serial interface (ASI) header.
Figure 1 shows a block
diagram of the ASI routing on the AC-MB.
Figure 1. AC-MB Audio Serial Interface Routing
Switch SW2 on the AC-MB selects the audio serial bus that interfaces with the TLV320ADC5140EVB.
Next to switch SW2, the AC-MB has a quick reference table to identify the audio serial interface source
options and switch settings. The AC-MB acts as the master for the audio serial interface, with three
different modes of operation (see
Figure 2 ): USB, optical or analog, or external ASI.