DRV612 Datasheet, PDF (1/23 Pages) Texas Instruments – 2-Vrms DirectPath™ Line Driver With Programmable-Fixed Gain

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DRV612
SLOS690B – DECEMBER 2010 – REVISED APRIL 2011
2-Vrms DirectPath™ Line Driver With Programmable-Fixed Gain
Check for Samples: DRV612
FEATURES
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•2 DirectPath™
– Eliminates Pops/Clicks
– Eliminates Output DC-Blocking Capacitors
– 3-V to 3.6-V Supply Voltage
• Low Noise and THD
– SNR > 105 dB at –1× Gain
– Typical Vn < 12 μVms 20 Hz–20 kHz
at –1× Gain
– THD+N < 0.003% at 10-kΩ Load
and –1× Gain
• 2-Vrms Output Voltage Into 600-Ω Load
• Single-Ended Input and Output
• Programmable Gain Select Reduces
Component Count
– 13× Gain Values
• Active Mute With More Than 80 dB Attenuation
• Short Circuit and Thermal Protection
• ±8-kV HBM ESD-Protected Outputs
APPLICATIONS
• PDP / LCD TV
• DVD Players
• Mini/Micro Combo Systems
• Soundcards
DESCRIPTION
The DRV612 is a single-ended, 2-Vrms stereo line
driver designed to reduce component count, board
space and cost. It is ideal for single-supply
electronics where size and cost are critical design
parameters.
The DRV612 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.
Designed using TI’s patented DirectPath technology,
which integrates a charge pump to generate a
negative supply rail that provides a clean, pop-free
ground-biased output. The DRV612 is capable of
driving 2 Vms into a 600-Ω load. DirectPath
technology also allows the removal of the costly
output dc-blocking capacitors.
The device has fixed-gain single-ended inputs with a
gain-select pin. Using a single resistor on this pin, the
designer can choose from 13 internal programmable
gain settings to match the line driver with the codec
output level. It also reduces the component count and
board space.
Line outputs have ±8 kV HBM ESD protection,
enabling a simple ESD protection circuit. The
DRV612 has built-in active mute control with more
that 80 dB attenuation for pop-free mute on/off
control.
The DRV612 is available in a 14-pin TSSOP and
16-pin QFN. For a footprint-compatible stereo
headphone driver, see TPA6139A2 (SLOS700).
DAC
SOC
DAC
-
+
Programmable
Gain
-1x to -10x DRV612
-
+
LEFT
Line Driver
RIGHT
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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 is a trademark of Texas Instruments.
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UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010–2011, Texas Instruments Incorporated