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TIDM-VOICEBANDAUDIO

Voice Band Audio Playback Using a PWM DAC

Design files

TIDM-VOICEBANDAUDIO

Design files

Overview

Low cost audio output based upon timer generating PWM & external low-pass filter with amplifier stages for either headphone or speaker. Audio data is stored in an on-board SPI Flash. A PC GUI with launchpad passthrough code is provided to load SPI Flash with audio data.

Features
  • Easily integrate code into existing systems (<2kB Flash needed)
  • BoosterPack design for easy LaunchPad use
  • 8 bit PWM DAC playback with low-cost filtering
  • Multiple playback frequencies supported
  • External SPI Flash storage for sound files
  • SPI Flash loading software included
  • Headphone jack or speaker output with volume control
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Design guide — TIDM-VOICEBANDAUDIO
TIDU703A.PDF (3942 K)

Reference design overview and verified performance test data

download Schematic — TIDM-VOICEBANDAUDIO
TIDRD63.PDF (408 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDM-VOICEBANDAUDIO
TIDRD64.PDF (215 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

download CAD/CAE symbol — TIDM-VOICEBANDAUDIO
TIDRD61.ZIP (468 K)

Files used for 3D models or 2D drawings of IC components

download Gerber file — TIDM-VOICEBANDAUDIO
TIDC940.ZIP (297 K)

Design file that contains information on physical board layer of design PCB

download PCB layout — TIDM-VOICEBANDAUDIO
TIDRD62.ZIP (354 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Analog switches & muxes

TS3A24159 — 0.3-Ω on-state resistance, 3.3-V, 2:1 (SPDT), 2-channel analog switch with 1.8-V input logic

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F5529 — 25 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FG6425 — 20 MHz MCU with 64KB Flash, 10KB SRAM, 16-bit Sigma-Delta ADC, dual DAC, DMA, 2 OpAmp, 160 s

Data sheet: PDF
MSP430 microcontrollers

MSP430FG6426 — 20 MHz MCU with 128KB Flash, 10KB SRAM, 16-bit Sigma-Delta ADC, dual DAC, DMA, 2 OpAmp, 160

Data sheet: PDF
MSP430 microcontrollers

MSP430FG6625 — 20 MHz MCU with 64KB Flash, 10KB SRAM, 16-bit Sigma-Delta ADC, dual DAC, DMA, 2 OpAmp, 160 s

Data sheet: PDF
MSP430 microcontrollers

MSP430FG6626 — 20 MHz MCU with 128KB Flash, 10KB SRAM, 16-bit Sigma-Delta ADC, dual DAC, DMA, 2 OpAmp, 160 seg L

Data sheet: PDF
Speaker amps

TPA301 — 350-mW, mono, Class-AB audio amplifier

Data sheet: PDF

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Software

Technical documentation

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Type Title Date
Design guide Voice Band Audio Playback Using a PWM DAC Design Guide (Rev. A) Feb. 24, 2016
Technical article MSP430 MCUs: Testing...testing...1...2...1...2 PDF | HTML Apr. 28, 2015

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