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.