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Related Manuals for Texas Instruments TPA6120A2
Summary of Contents for Texas Instruments TPA6120A2
- Page 1 TPA6120A2 Evaluation Module User’s Guide May 2004 HPA Audio Power SLOU169...
- Page 2 TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions:...
- Page 3 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.
- Page 4 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...
- Page 5 Read This First About This Manual This users guide describes the characteristics, operation, and use of the TPA6120A2 evaluation module (EVM). This users guide includes EVM description, performance specifications, board layout, bill of materials (BOM), and schematic diagram. How to Use This Manual This document contains the following chapters: Chapter 1 –...
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Page 7: Table Of Contents
............TPA6120A2 EVM Top Layer . - Page 8 4−1 Top Layer of the TPA6120A2 EVM ..........
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Page 9: Introduction
Chapter 1 Introduction The TPA6120A2 is a high-fidelity audio amplifier. The amplifier can operate from a split power supply, and is designed for low noise, high dynamic range performance. Topic Page Description ........... -
Page 10: Description
2) Do not short the outputs of the TPA6120A2 to either the positive or negative supply when operating with a split power supply. When operating with a single power supply, do not short the outputs to the... -
Page 11: Getting Started
Chapter 2 Getting Started Follow these steps to use the TPA6120A2 EVM in its original configuration. No soldering is necessary. Connection to the TPA6120A2 EVM can be made with banana plugs, RCA jacks, and a 1/4 inch headphone jack. See Figure 2−1 for an illustration of the top layer. -
Page 12: Power Supply
Power Supply 2.1 Power Supply 1) Make sure all external power supplies are turned off. 2) Connect an external power supply with the positive voltage set between 5 V and 15 V to the terminal marked +12 V (J8) on the EVM. 3) Connect the negative voltage to the terminal marked −12 V (J9), making sure the negative voltage is set to the same magnitude as that of the positive (i.e., ±5 V, ±12 V, ±15 V). -
Page 13: Top Layer With Numbered Callouts
Power Up Figure 2−1. Top Layer With Numbered Callouts (From paragraphs 2.1 through 2.3) Getting Started... - Page 14 Power Up (This page has been left blank intentionally.)
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Page 15: Customizing The Evm
Chapter 3 Customizing The EVM The TPA6120A2 EVM comes in a noninverting configuration with a gain of 2 V/V. However, the EVM is designed to be flexible, and can be converted to operate in inverting and differential configurations. The TPA6120A2 EVM can also be operated in a single power supply configuration. -
Page 16: Inverting Configuration
EVM, the gain is set to −1 V/V (R 3.2 Differential Configuration The TPA6120A2 EVM can also be converted to operate in a differential input configuration. Remove resistors R11 and R12. Resistors R9 and R10 must be removed and replaced with resistors whose values match those of resistors R3 and R4, respectively. -
Page 17: Evm Circuit And Layout
Chapter 4 EVM Circuit and Layout The TPA6120A2 EVM layout was carefully planned to minimize the capacitance and inductance detected by the output and input pins of the amplifier. Test points are available, but intentionally left unpopulated to keep signal interference as low as possible. -
Page 18: Tpa6120A2 Evm Top Layer
TPA6120A2 EVM Top Layer 4.1 TPA6120A2 EVM Top Layer Figure 4−1 shows the top layer of the TPA6120A2 EVM. The RCA jacks at the inputs are configured to short to ground when no plug is inserted. The noninverting configuration of the EVM requires that RIN− and LIN− be at ground. -
Page 19: Tpa6120A2 Evm Bottom Layer
TPA6120A2 EVM Bottom Layer 4.2 TPA6120A2 EVM Bottom Layer Figure 4−2 shows the bottom layer of the TPA6120A2 EVM. Note that the copper has been removed from around the capacitive sensitive nodes. It is important to remember that the thermal pad on the underside of the IC must be properly soldered to the board at all times. -
Page 20: Component Selection
Thin film resistors have excellent noise and distortion performance. 4.4 Input Bias Voltage The TPA6120A2 EVM is designed to keep a constant dc voltage on the positive input pins of the amplifier. This is done with resistors R9 and R10 which effectively tie the positive input pins to ground. -
Page 21: Schematic
Schematic The TPA6120A2 EVM uses 4.02-kΩ resistors to tie the positive terminals to ground. This value is a good compromise between the device’s effect on the performance of the audio source and the output offset voltage. When the source is removed or is off (or high impedance), the maximum output offset value possible with a 4.02-kΩ... -
Page 22: Bill Of Materials
Bill of Materials 4.6 Bill of Materials Table 4−1. TPA6120A2 EVM Bill of Materials Manufacturer Distributor Component Component Value Value Size Size Name Number Name Number 10 µF, 50V, +80/−20%, F C5, C6 1210 Panasonic ECJ−4YF1H106Z Digi−Key PCC2308TR−ND C1, C2, C3, 0.1 µF, 50V, ±10%, X7R...
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