DRV604 Datasheet, PDF (13/21 Pages) Texas Instruments – DirectPath™ 2Vrms Line Driver and HP Amp With Adjustable Gain

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DRV604
SLOS659 – JANUARY 2010
Dual Stereo Line Driver
The DRV604 Headphone stereo amplifier can also be used as Line Driver and has the same high output voltage
capability as the Line amp when driving 5kΩ load impedances. This makes the DRV604 ideal for applications like
dual SCART outputs on LCD TV, or for multiple line outputs like in DVD or Blue-Ray players where 2x DRV604
can give a very space effective solution for a 8ch line output.
Capacitive Load
The DRV604 has the ability to drive a high capacitive load up to 220pF directly, higher capacitive loads can be
accepted by adding an output series resistor of 47Ω or larger for the line driver output.
Layout Recommendations
A proposed layout for the DRV604 can be seen in the DRV604EVM user's guide, SLOU288, and the Gerber files
can be downloaded on www.ti.com, open the DRV604 product folder and look in the Tools and Software folder.
The gain setting resistors, R_in and R_fb, must be placed close to the input pins to minimize the capacitive loading
on these input pins and to ensure maximum stability of the DRV604.
Ground traces are recommended to be routed as a star ground to minimize hum interference.
PVDD, PVSS decoupling capacitors and the charge pump capacitors should be connected with short traces.
Footprint Compatible with the DRV603
The DRV604 stereo line driver section is pin compatible with the DRV603. A single PCB layout can therefore be
used with stuffing options for different output configurations.
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