1FEATURES
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

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.