DRV604 Datasheet, PDF (1/21 Pages) Texas Instruments – DirectPath™ 2Vrms Line Driver and HP Amp With Adjustable Gain

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DRV604
SLOS659 – JANUARY 2010
DirectPath™ 2Vrms Line Driver and HP Amp With Adjustable Gain
Check for Samples: DRV604
FEATURES
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•23 DirectPath™
– Eliminates Pop/Clicks
– Eliminate Output DC-Blocking Capacitors
• 3.0V to 3.7V Supply Voltage
• Low Noise and THD
– SNR > 109dB
– Typical Vn < 7µVrms 20–20kHz
– THD+N < 0.002% at 10kΩ
• Output Voltage into 5kΩ Load
– 2Vrms at 3.3V Supply Voltage
• Stereo DirectPath™ Headphone:
– 40mW into 32Ω at 3.3V Supply Voltage
– 16Ω to ∞ Ω Stable Load Range
• Differential Input
• Power Sense UVP for Brown Out Protection
• Short Circuit and Thermal Protection
• ±8kV IEC ESD Protection
• Footprint Compatible with DRV602 and
DRV603
• Supports Dual Line Driver Configuration
DAC
DAC
SOC
DAC
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RIGHT
Line Driver
LEFT
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DRV604
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Headphone
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APPLICATIONS
• LCD and PDP TV
• Blu-ray Disc™, DVD Players
• Mini/Micro Combo Systems
• Soundcards
DESCRIPTION
The DRV604 is a 2Vrms Pop-Free stereo line driver
with stereo headphone output designed to allow the
removal of the output DC-blocking capacitors for
reduced component count and cost. The device is
ideal for single supply electronics where size and cost
are critical design parameters.
Designed using TI’s patented DirectPath™
technology, The DRV604 is capable of driving 2 Vrms
into a 5kΩ load. The headphone output can generate
a clean 40mW into 32Ω load from a 3.3V supply.. The
device has differential inputs and uses external gain
setting resistors that supports a gain range of -1V/V
to -10V/V. Headphone and line outputs have ±8kV
IEC ESD protection enabling a simple ESD protection
circuit. The DRV604 has built-in enable control for
pop-free on/off control. DRV604 can monitor an
external supply voltage using its built in comparator
enabling it to shut down during a brown out condition
before up stream audio DAC’s can produce click and
pop artifacts.
Using the DRV604 in audio products can reduce
component count considerably compared to
traditional methods of generating headphone output
and 2Vrms output. The DRV604 does not require a
power supply greater than 3.3V to generate its
5.6Vpp output, nor does it require a split rail power
supply. The DRV604 integrates its own charge pump
to generate a negative supply rail that provides a
clean, pop-free ground biased 2Vrms output.
The DRV604 is available in a 28-pin HTSSOP. For a
stereo line driver with no HP amp see DRV603.
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DAC
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
DirectPath, FilterPro are trademarks of Texas Instruments.
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Blu-ray Disc is a trademark of Blu-ray Disc Association.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated