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DRV602PW Datasheet(PDF) 6 Page - Texas Instruments |
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DRV602PW Datasheet(HTML) 6 Page - Texas Instruments |
6 / 12 page APPLICATION INFORMATION Line Driver Amplifiers OPAMP Co MuteCircuit Output Enable + + + - ConventionalSolution DRV602 Output Enable + - DVR602Solution VDD VSS GND VDD VDD/2 GND DirectPath 9-12V 5V DRV602 SLOS572 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com Single-supply line driver amplifiers typically require dc-blocking capacitors. The top drawing in Figure 5 illustrates the conventional line driver amplifier connection to the load and output signal. DC blocking capacitors are often large in value, and a mute circuit is needed during power up to minimize click & pop. The output capacitor and mute circuit consume PCB area and increase cost of assembly, and can reduce the fidelity of the audio output signal. Figure 5. Conventional and DirectPath Line Driver The DirectPath™ amplifier architecture operates from a single supply, but makes use of an internal charge pump to provide a negative voltage rail. Combining the user provided positive rail and the negative rail generated by the IC, the device operates in what is effectively a split supply mode. The output voltages are now centered at zero volts with the capability to swing to the positive rail or negative rail. The DirectPath amplifier requires no output dc blocking capacitors. The bottom block diagram and waveform of Figure 5 illustrate the ground-referenced Line Driver architecture. This is the architecture of the DRV602. 6 Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): DRV602 |
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