Texas Instruments DRV601EVM User Manual
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Texas Instruments DRV601EVM User Manual

Texas Instruments DRV601EVM User Manual

Evaluation module
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This user's guide describes the operation of the DRV601EVM stereo line driver evaluation module and
provides measurement data and design information such as the schematic, bill of materials, and
printed-circuit board layout.
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PurePath Digital, DirectPath, FilterPro are trademarks of Texas Instruments.
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List of Tables
User's Guide
SLOU215 - January 2008
DRV601EVM
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DRV601EVM
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Summary of Contents for Texas Instruments DRV601EVM

  • Page 1: Table Of Contents

    User's Guide SLOU215 – January 2008 DRV601EVM This user’s guide describes the operation of the DRV601EVM stereo line driver evaluation module and provides measurement data and design information such as the schematic, bill of materials, and printed-circuit board layout. Contents ........................

  • Page 2: Overview

    ......................PCB Specifications Overview The DRV601EVM customer evaluation module (EVM) demonstrates the integrated circuits DRV601RTJ from Texas Instruments (TI). The DRV601 is a stereo line driver designed to allow the removal of the DC-blocking capacitors for reduced component count and cost. The DRV601 is ideal for single-supply electronics where size and cost are critical design parameters ().

  • Page 3: Quick Setup Guide

    Figure 3. DRV601EVM Physical Structure Quick Setup Guide This section describes the DRV601EVM board in regards to power supply and system interfaces. It provides information regarding handling and unpacking, absolute operating conditions, and a description of the factory default switch and jumper configuration.
  • Page 4 Quick Setup Guide Electrostatic Discharge Warning Many of the components on the DRV601EVM are susceptible to damage by electrostatic discharge (ESD). Customers are advised to observe proper ESD handling precautions when unpacking and handling the EVM, including the use of a grounded wrist strap at an approved ESD workstation.

  • Page 5: Shutdown

    Low ESR capacitors are an ideal selection, and a value of 1 µF is typical. Capacitor values smaller than 1 µF can be used, but the maximum output can be reduced. It is therefore recommended to validate the design with thorough testing. SLOU215 – January 2008 DRV601EVM Submit Documentation Feedback...

  • Page 6: Second-Order, Active Low-Pass Filter

    The component values can be calculated with the help of the TI FilterPro™ program available on: http://focus.ti.com/docs/toolsw/folders/print/filterpro.html Table 3, various proposals for the filter and gain settings can be found. Table 3. DRV601EVM Specification Gain High Pass Low Pass 1 µF –1 V/V...

  • Page 7: Layout Recommendations

    If the SGND pins are connected directly to each other, the part functions without risk of failure, but the noise and THD performance can be reduced. SLOU215 – January 2008 DRV601EVM Submit Documentation Feedback...

  • Page 8: Drv601Evm Performance

    DRV601EVM Performance DRV601EVM Performance This section provides general test specifications, electrical data, audio performance data, and physical specifications. Table 4. General Test Specifications GENERAL TEST SPECIFICATIONS NOTES Supply Voltage 3.3 V 600 Ω Load Impedance Input Signal 1-kHz Sine...

  • Page 9: Thd+N Vs Voltage (600 Ω)

    DRV601EVM Performance THD+N vs Voltage (600-Ω Load) 1.8 V DVDD 3.3 V DVDD 4.5 V DVDD 0.05 0.02 0.01 0.005 0.002 0.001 100m 200m 500m V - Output Voltage - Vrms Figure 6. THD+N vs Voltage (600 Ω) The THD+N from 10m Vrms to approximately 0.5 Vrms is dominated by noise.

  • Page 10: Thd+N Vs Voltage (100-Kω Load)

    DRV601EVM Performance THD+N vs Voltage (100-kΩ load) 1.8 V DVDD 3.3 V DVDD 4.5 V DVDD 0.05 0.02 0.01 0.005 0.002 0.001 100m 200m 500m V - Output Voltage - Vrms Figure 8. THD+N vs Voltage (100-kΩ load) The THD+N in the range from 10mVrms to 1Vrms is completely dominated by noise.

  • Page 11: Thd+N Vs Voltage (600-Ω Load)

    DRV601EVM Performance THD+N vs Frequency (600R Load) 3.3 V DVDD 3.3 V DVDD 0.05 3.63 V DVDD 0.02 0.01 0.005 0.002 0.001 V - Output Voltage - Vrms Figure 10. THD+N vs Voltage (600-Ω Load) Here the clipping is shown with a 3.3-V supply, and ±10% tolerance. It shows that even with a low DVDD, 3.3 V–10% , the DRV601 can achieve the 2 Vrms with a THD+N less than 1%.

  • Page 12: Thd+N Vs Frequency (600-Ω Load)

    Figure 12. THD+N vs Frequency (600-Ω Load) The DRV601EVM uses a 1-µF film capacitor for ac-coupling of the input signal. If a lower cost ceramic capacitor, like a X7R is used, higher THD at low frequencies should be expected. Y5V capacitors show even higher THD and cannot be recommended at all.

  • Page 13: Fft Spectrum With -60-Dbfs Tone

    DRV601EVM Performance FFT Spectrum With –60 dBFS Tone Reference voltage is 2 Vrms. FFT size 16k. -100 -110 -120 -130 -140 -150 f - Frequency - Hz Figure 14. FFT Spectrum With –60-dBFS Tone This spectrum corresponds to a dynamic range of 104-dB A-weighted. SNR measures to 104 dB A-weighted, <12 µVrms.

  • Page 14: Channel Separation

    DRV601EVM Performance Channel Separation Channel-1 output signal is 2 Vrms; channel-2 input is grounded. Reference voltage is 2 Vrms; the load is 600R. 0 dB Right to Left Left Right -100 -110 -120 f - Frequency - Hz Figure 16. Channel Separation Left-to-right cross-coupling and right-to-left cross-coupling are not exactly the same;...

  • Page 15: Channel Separation, 10X Lower Feedback Impedance

    DRV601EVM Performance Frequency Response Measurement bandwidth filter is set to 500 kHz. 0 dB Right to Left Left Right -100 -110 -120 f - Frequency - Hz Figure 17. Channel Separation, 10x Lower Feedback Impedance With a 10x lower impedance in the feedback network, the channel separation improved significantly and is now >100 dB at 1 kHz.

  • Page 16: Phase Response

    DRV601EVM Performance -100 -120 -140 -160 load -180 -200 -220 -240 -260 -280 -300 -320 -340 -360 f - Frequency - Hz Figure 19. Phase Response The low-frequency cutoff of 10 Hz (–3 dB) is determined by the input ac-coupling capacitor, 1 µF, together with the feedback network input impedance of 15kR.

  • Page 17: Pop/Click (Disable)

    DRV601EVM Performance 100m -20m -40m -60m -80m -100m t - Time - s -100 f - Frequency - Hz Figure 20. Pop/Click (Enable) The DRV601 shows very low pop during enable; only two small high-frequency spikes can be seen. The measurements are made with reference to 2 Vrms = 0 dB, 2 mV=-60 dBr.
  • Page 18 DRV601EVM Performance 100m -20m -40m -60m -80m -100m t - Time - s -100 f - Frequency - Hz Figure 21. Pop/Click (Disable) During power-down, the click is even lower than during power-on (enable). A very small click is seen.

  • Page 19: Related Documentation From Texas Instruments

    Related Documentation from Texas Instruments Related Documentation from Texas Instruments For detailed descriptions of the integrated circuits used in the design of the DRV601EVM, see data sheet DirectPath™ Stereo Line Driver, Adjustable Gain (SLOS553). Design Documentation This section includes a schematic for the DRV601EVM, the bill of materials, and the PCB design specifications.
  • Page 20 10R / 100 mW / 5% / 0603 Thick Film Resistor Yageo RC0603JR-0710RL Switch 6 mm SMD Tactile Switch Omron B3S-1000 DRV601 / DirectPath™ Audio Line Driver with external Texas Instruments DRV601RTJT gain setting. (QFN-20) PCB Specifications Table 9. PCB Specifications BOARD IDENTIFICATION A834-PCB-001(2.00)

  • Page 21: Drv601Evm Pcb Component Placement Top

    Design Documentation PCB Layout Gerber files are available on the EVM page for download. Figure 22. DRV601EVM PCB Component Placement Top Figure 23. PCB Top Layer SLOU215 – January 2008 DRV601EVM Submit Documentation Feedback...

  • Page 22: Pcb Bottom Layer

    Design Documentation Figure 24. PCB Bottom Layer DRV601EVM SLOU215 – January 2008 Submit Documentation Feedback...
  • Page 23 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
  • Page 24 TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products...
  • Page 25 Мы молодая и активно развивающаяся компания в области поставок электронных компонентов. Мы поставляем электронные компоненты отечественного и импортного производства напрямую от производителей и с крупнейших складов мира. Благодаря сотрудничеству с мировыми поставщиками мы осуществляем комплексные и плановые поставки широчайшего спектра электронных компонентов.

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