Texas Instruments DEM-PCM2912AEVM User Manual

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EVM User's Guide: DEM-PCM2912AEVM
DEM-PCM2912A Evaluation Module
Description
The DEM-PCM2912A EVM is a complete evaluation
platform for the 16-bit, mono microphone input and
stereo headphone output
audio codec with a USB interface. All necessary
connectors and circuitry are provided for interfacing to
audio test systems and commercial audio equipment.
A USB connector is mounted on the DEM-PCM2912A
EVM. Stereo audio output and mono audio input are
available on two stereo mini-jacks.
Get Started
• Order the EVM from the
product folder
• Download the latest PCM2912A data sheet from
ti.com
• A PC with either Windows
Features
Major features of the PCM2912A include:
• Analog Front End:
– Microphone amplifier (+20 dB gain)
– Mono input
• Analog Back End:
– Stereo/Mono headphone amplifier or line output
with volume
• Analog Performance:
– Dynamic range: 90 dB (DAC)
SBAU141A – JANUARY 2009 – REVISED APRIL 2024
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PCM2912A bus-powered
DEM-PCM2912AEVM
® 10 or MacOS ®
DEM-PCM2912A EVM Board
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– Dynamic range: 90 dB (ADC)
– 25-mW headphone output at R
• Power-Supply Voltage
– Single power supply of 5.0 V (V
• Low Power Dissipation:
– 425 mW at analog-to-digital converter
(ADC) and digital-to-analog converter (DAC)
operation, 44.1 kHz
– 0.8 mW in Suspend mode
• Sampling Frequency: 8 kHz, 11.025 kHz, 16 kHz,
22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz for ADC and
DAC
• Programmable Function:
– –76-dB to 0-dB gain for analog outputs
– –12-dB to +30-dB gain for analog inputs
– –76-dB to 0-dB gain for sidetone
– 0-dB/20-dB gain for microphone amplifier
– High-pass filter: 0.078 ×f
• Package: 32-pin TQFP
• Operating Temperature Range: –25°C to +85°C
Applications
• USB headset
• USB headphone
• USB speaker
• USB featured consumer audio product
• USB audio interface box
• USB monitor
• Video conference system
DEM-PCM2912A Evaluation Module
Description
= 16 Ω
L
)
BUS
cutoff frequency
S
1