Evm for high-speed fully-differential amplifier (26 pages)
Summary of Contents for Texas Instruments TAS5066-5112F6EVM
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TAS5066 5112F6EVM PurePath DigitalE Evaluation Module for the TAS5066PAG Six Channel Digital Audio PWM Processor and TAS5112ADFD Stereo Digital Amplifier Power Output Stage User’s Guide April 2004 Digital Audio and Video Products SLEU051...
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EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods.
EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright 2004, Texas Instruments Incorporated...
Preface Read This First About This Manual This manual describes the operation of the TAS5066-5112F6EVM evaluation module from Texas Instruments. How to Use This Manual This document contains the following chapters: Chapter 1 — Overview Chapter 2 — System Interfaces Chapter 3 —...
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Related Documentation from Texas Instruments The following table contains a list of data manuals that have detailed descrip- tions integrated circuits used design TAS5066−5112F6EVM. The data manuals can be obtained at the URL http://www.ti.com. Part Number Literature Number TAS5066PAG SLES089...
8 matched and electrically isolated, enhancement-mode, N-channel pow- er DMOS transistors, and protection/fault-reporting circuitry. The TAS5066-5112F6EVM, together with a TI input board, is a complete digital audio amplifier system which includes digital input (S/PDIF), analog input, in- terface to PC, digital volume control, and failure protection. The system is de- signed for home theater applications such as DVD minicomponent systems, home theater in a box (HTIB), DVD receiver, A/V receiver, or TV sets.
TAS5066-5112F6EVM Features 1.1 TAS5066-5112F6EVM Features 6-channel PurePath Digitalt reference design Subwoofer line out with low-pass filter Self-contained protection system (short circuit and thermal) Standard I S and I C/control connector for TI input board Double-sided, plated-through PCB layout Figure 1−1. Complete PurePath DigitalE System...
PCB Key Map 1.2 PCB Key Map Figure 1−2 shows the physical structure for the TAS5066-5112F6EVM. Figure 1−2. Physical Structure for the TAS5066-5112F6EVM J902 J220 J240 J320 J340 J420 J440 PSU CONTROL LOUDSPEAKER OUTPUTS TAS5066 SUBWOOFER J500 LINE OUT J130...
Chapter 2 System Interfaces This chapter describes the TAS5066-5112F6EVM board in regards to power supply (PSU) and system interfaces. Topic Page PSU Interface (J901) ......... . .
PSU Interface (J901) 2.1 PSU Interface (J901) The TAS5066-5112F6EVM module must be powered from one or two external regulated power supplies. High audio performance requires a stabilized output stage power supply with low ripple voltage and low output impedance. Note: The length of power supply cable must be minimized.
PSU Interface (J901) Figure 2−2. J901 Pin Numbers (PCB Connector Top View) Table 2−2. J901 Pin Description Pin Number Net-Name on Schematics Description V-HBRIDGE Output stage power supply System power supply Ground Ground System Interfaces...
PSU Control Interface (J902) 2.2 PSU Control Interface (J902) This interface is used for onboard sensing of output supply voltage and for power supply volume control (PSCV). Figure 2−3. J902 Pin Numbers (PCB Connector Top View) Table 2−3. J902 Pin Description Pin Number Net-Name on Schematics Description...
Loudspeaker Connectors (J220, J240, J320, J340, J420, and J440) 2.3 Loudspeaker Connectors (J220, J240, J320, J340, J420, and J440) The output stage for the right and left front channels are separated into two different TAS5112A, in order to improve the stereo performance and thermal capability with continuous 0-dB sine wave during stereo power tests.
Subwoofer Line Out Connector (J500) 2.4 Subwoofer Line Out Connector (J500) Figure 2−5. J500 Pin Numbers (PCB Connector Top View) Table 2−6. J500 Pin Description Pin Number Net-Name on Schematics Description Subwoofer line out Ground...
Control Interface (J130) 2.5 Control Interface (J130) This interface connects the TAS5066-5112F6EVM board to a TI input board. Table 2−7. J130 Pin Description Pin Number Net-Name on Schematics Description Ground PSVC-MCPU Power supply volume control from (mC) input board (for future...
Digital Audio Interface (J131) 2.6 Digital Audio Interface (J131) The digital audio interface contains digital audio signal data (I S), clocks, etc. See the TAS5066 data manual for signal timing and details not explained in this document. Table 2−8. J131 Pin Description Pin Number Net-Name on Schematics Description...
PWM Timing, Interchannel Delay Registers 2.7 PWM Timing, Interchannel Delay Registers For maximum performance, the PWM timing must be optimized for the specific configuration and PCB layout. The default values in TAS5066 are not optimal in many designs and therefore the interchannel delays must be programmed by I C to the TAS5066 at start-up and after every system reset.
Chapter 3 Protection This chapter describes the short-circuit protection and fault-reporting circuitry of the TAS5112A device. Topic Page Short-Circuit Protection and Fault-Reporting Circuitry ... Device Fault Reporting ........Protection...
Short-Circuit Protection and Fault-Reporting Circuitry 3.1 Short-Circuit Protection and Fault-Reporting Circuitry The TAS5112A is a self-protecting device that provides device fault reporting (including high-temperature protection and short-circuit protection). The TAS5112A is configured in back-end, auto-recovery mode and therefore re- sets automatically after all errors (M1, M2, and M3 are set low). This means that the device re-starts itself after an error occurs and reports the short through the SHUTDOWN1 and SHUTDOWN2 error signals.
High-temperature warning Undervoltage lockout or high-current error Normal operation, no errors/warnings The temperature warning (OTW) signals at the TAS5066-5112F6EVM board are wire-ORed to one temperature warning signal (TEMP_WARNING – pin 22 in the control interface connector). Shutdown signals (SD_AB and SD_CD) are wire-ORed to two shutdown signals (SHUTDOWN1 and SHUTDOWN2 –...
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