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This user's guide describes the operation of the DRV603 evaluation module. This document also provides
measurement data and design information including a schematic, bill of materials, and printed circuit board
(PCB) layout drawings.
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1
Overview
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2
Quick Setup
3
On/Off Sequence
4
Component Selection
5
Layout Recommendations
6
DRV603EVM Performance
7
Related Documentation from Texas Instruments
8
Design Documentation
1
DRV603EVM Functional Block Diagram
2
Power-Up/-Down Sequence
3
Differential Input, Second-Order, Active Low-Pass Filter
4
THD+N versus Voltage (Analog Input)
5
THD+N versus Voltage (Digital Input)
6
THD+N versus Frequency (Analog Input)
7
THD+N versus Frequency (Digital Input, 0 dBFS)
8
FFT Spectrum with –60-dBFS Tone (Analog Input)
9
FFT Spectrum with –60-dBFS Tone (Digital Input)
10
Idle Noise FFT Spectrum (Analog Input)
11
Idle Noise FFT Spectrum (Digital Input)
12
Channel Separation (Analog Input)
13
Channel Separation (Digital Input)
14
Frequency Response (Analog Input)
DirectPath is a trademark of Texas Instruments.
Blu-ray Disc is a trademark of Blu-ray Disc Association.
TOSLINK is a trademark of Toshiba Corporation.
All other trademarks are the property of their respective owners.
SLOU252A – December 2008 – Revised January 2009
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DRV603EVM
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SLOU252A – December 2008 – Revised January 2009
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User's Guide
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Related Manuals for Texas Instruments DRV603EVM
Summary of Contents for Texas Instruments DRV603EVM
- Page 1 Channel Separation (Digital Input) ..................Frequency Response (Analog Input) DirectPath is a trademark of Texas Instruments. Blu-ray Disc is a trademark of Blu-ray Disc Association. TOSLINK is a trademark of Toshiba Corporation. All other trademarks are the property of their respective owners.
- Page 2 Bill of Materials ......................PCB Specifications Overview The DRV603EVM customer evaluation module (EVM) demonstrates the capabilities and operation of the DRV603 integrated circuit from Texas Instruments. The DRV603 is a 2-V pop-free stereo line driver designed to allow removal of the output dc-blocking capacitors in audio applications to reduce component count and overall cost.
- Page 3 > 108 dB Quick Setup This section describes the DRV603EVM board with regard to the power supply and system interfaces. It provides information about handling and unpacking the DRV603EVM, absolute operating conditions, and a description of the factory default switch and jumper configurations.
- Page 4 Upon opening the DRV603EVM package, ensure that the following items are included: • One DRV603EVM evaluation board, including: – One DRV603PW device If either item is missing, please contact the Texas Instruments Product Information Center nearest you to inquire about a replacement. Power-Supply Setup A single power supply is required to power up the EVM.
- Page 5 TI web site. Figure 3 illustrates the circuit design for this configuration. DRV603 Figure 3. Differential Input, Second-Order, Active Low-Pass Filter SLOU252A – December 2008 – Revised January 2009 DRV603EVM Submit Documentation Feedback...
- Page 6 If the SGND pins are connected directly to each other, the device functions without risk of failure, but noise and THD performance can be reduced. On the DRV603EVM, a star ground routing pattern is used; the star point is located directly below the DRV603 device itself.
- Page 7 DRV603EVM Performance www.ti.com Table 5. Electrical Data Electrical Data Notes/Conditions Output voltage, 2500 Ω 3.4 V 1 kHz, THD+N = 1%, T = +25°C Output voltage, 100 kΩ 3.5 V 1 kHz, THD+N = 1%, T = +25°C 1 kHz, V...
- Page 8 DRV603EVM Performance www.ti.com THD+N versus Voltage Up to approximately 1 V , THD+N is dominated by the noise element for both the analog input and the digital input, respectively, as shown in Figure 4 Figure 5. 0.001% equals –100 dB for both graphs.
- Page 9 DRV603EVM Performance www.ti.com THD+N vs Frequency Figure 6 Figure 7 illustrate characteristic performance for THD+N versus frequency. 200 mV 0.01 0.001 Load: 2.5 kW 0.0001 10 k 20 k Frequency (Hz) Figure 6. THD+N versus Frequency (Analog Input) 200 mV 0.01...
- Page 10 DRV603EVM Performance www.ti.com FFT Spectrum with –60dBFS Tone For the FFT plot shown in Figure 8, the reference voltage is 3 V and the FFT size is 16 k. Frequency (kHz) Figure 8. FFT Spectrum with –60-dBFS Tone (Analog Input)
- Page 11 DRV603EVM Performance www.ti.com Idle Noise FFT Spectrum For both analog and digital inputs, as shown in Figure 10 Figure 11 respectively, the reference voltage is 2 V and the FFT size is 16 k. 90 95 Frequency (kHz) Figure 10. Idle Noise FFT Spectrum (Analog Input) Frequency (kHz) Figure 11.
- Page 12 DRV603EVM Performance www.ti.com Channel Separation Figure 12 illustrates the channel separation for the analog input. Figure 13 shows the channel separation for the digital input. 0 dB (3 V Right-to-Left Left-to-Right 10 k 20 k Frequency (Hz) Figure 12. Channel Separation (Analog Input) 0 dB (2.1 V...
- Page 13 DRV603EVM Performance www.ti.com Frequency Response Figure 14 Figure 15 show the frequency response for the analog and digital inputs, respectively. Output 10 k 100 k 200 k Frequency (Hz) Figure 14. Frequency Response (Analog Input) 48 kHz Sample Rate 2.1 V...
- Page 14 DRV603EVM Performance www.ti.com Pop/Click (Enable) The characteristic performance for pop and click interference is shown with and without an input signal applied, with a load of 2.5 kΩ. Measurement results are presented in a time domain format. Figure 16, the power supply is applied, and then the shutdown signal is released. The shutdown signal triggers the measuring system.
- Page 15 Related Documentation from Texas Instruments www.ti.com Related Documentation from Texas Instruments The following related documents are available through the Texas Instruments web site at http://www.ti.com.These documents have detailed descriptions of the integrated circuits used in the design of the DRV603EVM.
- Page 16 10uF /DAC-MUTE PCM1789 LD_L_M Shunt Header DAC_R_M 1.80k DAC_R_P DAC_L_M DAC_L_P DAC_L_P DAC_L_M 1.80k LD_L_P Shunt Header Figure 19. DRV603EVM Schematic: Digital-to-Analog Converter and Source Select S/PDIF +3.3V 220R /DAC-MUTE 1.0k +3.3V +3.3V PMBT2222 AUDIO CKSEL 4.7R 4.7R MCLK FSOUT0...
- Page 17 100nF 100nF 10uF Header 10uF TLV1117-50C 100nF VSUP 100nF 10uF /POR Green AMP ON/OFF RESET SW90 220R Switch RESET TPS3825-50 Figure 21. DRV603EVM Schematic: TOSLINK and Power Supply SLOU252A – December 2008 – Revised January 2009 DRV603EVM Submit Documentation Feedback...
- Page 18 Design Documentation www.ti.com Parts List The bill of materials (BOM) for the DRV603EVM is listed in Table Table 10. Bill of Materials Part Reference Description Manufacturer Mfr Part No Ceramic 1 µF / 16 V / 20% X7R 0805 C12, C13, C14...
- Page 19 Yageo RC0603JR-0722KL Resistor SW90 Switch DPDT PCB Mount Switch NKK-Nikkai G-22-AP DIR9001 / 96-kHz Digital Audio Receiver Texas Instruments DIR9001PW (TSSOP28) TLV1117-33C / 3.3-V / 800-mA Positive Texas Instruments TLV1117-33CDCYR Voltage Regulator (SOT4-DCY) TLV1117-50C / 5.0-V / 800-mA Positive Texas Instruments...
- Page 20 Design Documentation www.ti.com PCB Layers Gerber files are available for download at the DRV603EVM product folder page on the TI web site. Component placement and board layout are illustrated in Figure Figure 23, and Figure respectively. Note: Board layouts are not to scale. These figures are intended to show how the board is laid out;...
- Page 21 Design Documentation www.ti.com Figure 23. DRV603EVM PCB Top Layer Figure 24. DRV603EVM PCB Bottom Layer SLOU252A – December 2008 – Revised January 2009 DRV603EVM Submit Documentation Feedback...
- Page 22 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 23 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.