SLOS681A – JANUARY 2011 – REVISED JULY 2013
DirectPath™, 2-VRMS Audio Line Driver With Adjustable Gain
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FEATURES
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Stereo DirectPath™ Audio Line Driver
– 2 Vrms Into 10 kΩ With 3.3-V Supply
Low THD+N < 0.01% at 2 Vrms Into 10 kΩ
High SNR, >90 dB
600-Ω Output Load Compliant
Differential Input and Single-Ended Output
Adjustable Gain by External Gain-Setting
Resistors
Low DC Offset, <1 mV
Ground-Referenced Outputs Eliminate DC-
Blocking Capacitors
– Reduce Board Area
– Reduce Component Cost
– Improve THD+N Performance
– No Degradation of Low-Frequency
Response Due to Output Capacitors
Short-Circuit Protection
Click- and Pop-Reduction Circuitry
External Undervoltage Mute
Active Mute Control for Pop-Free Audio On/Off
Control
Space-Saving TSSOP Package
DESCRIPTION
The DRV632 is a 2-V
RMS
pop-free stereo line driver
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 DRV632 is capable of driving 2 V
RMS
into a 10-kΩ load with 3.3-V supply voltage. The
device has differential inputs and uses external gain-
setting resistors to support a gain range of ±1 V/V to
±10 V/V, and gain can be configured individually for
each channel. Line outputs have ±8-kV IEC ESD
protection, requiring just a simple resistor-capacitor
ESD protection circuit. The DRV632 has built-in
active-mute control for pop-free audio on/off control.
The DRV632 has an external undervoltage detector
that mutes the output when the power supply is
removed, ensuring a pop-free shutdown.
Using the DRV632 in audio products can reduce
component count considerably compared to
traditional methods of generating a 2-V
RMS
output.
The DRV632 does not require a power supply greater
than 3.3 V to generate its 5.6-V
pp
output, nor does it
require a split-rail power supply. The DRV632
integrates its own charge pump to generate a
negative supply rail that provides a clean, pop-free
ground-biased 2-V
RMS
output.
The DRV632 is available in a 14-pin TSSOP.
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APPLICATIONS
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Set-Top Boxes
Blu-ray Disc™, DVD Players
LCD and PDP TV
Mini/Micro Combo Systems
Sound Cards
Laptops
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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.
Blu-ray Disc is a trademark of Blu-ray Disc Association.
Copyright © 2011–2013, Texas Instruments Incorporated
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.
TI [ TEXAS INSTRUMENTS ]
