SOC

DRV604

Headphone

RIGHT

-

+

DAC

-

+

DAC

-

+

DAC

-

+

DAC

LEFT

LineDriver

DRV604

www.ti.com

SLOS659 – JANUARY 2010

DirectPath™ 2Vrms Line Driver and HP Amp With Adjustable Gain

Check for Samples: DRV604

1

FEATURES

APPLICATIONS

•

LCD and PDP TV

23

•

DirectPath™

•

Blu-ray Disc™, DVD Players

–

Eliminates Pop/Clicks

•

Mini/Micro Combo Systems

–

Eliminate Output DC-Blocking Capacitors

•

Soundcards

•

3.0V to 3.7V Supply Voltage

•

Low Noise and THD

DESCRIPTION

–

SNR > 109dB

The DRV604 is a 2Vrms Pop-Free stereo line driver

–

Typical Vn < 7µVrms 20–20kHz

with stereo headphone output designed to allow the

–

THD+N < 0.002% at 10k

Ω

removal of the output DC-blocking capacitors for

reduced component count and cost. The device is

•

Output Voltage into 5k

Ω Load

ideal for single supply electronics where size and cost

–

2Vrms at 3.3V Supply Voltage

are critical design parameters.

•

Stereo DirectPath™ Headphone:

Designed

using

TI’s

patented

DirectPath™

–

40mW into 32

Ω at 3.3V Supply Voltage

technology, The DRV604 is capable of driving 2 Vrms

–

16

Ω to ∞ Ω Stable Load Range

into a 5k

Ω load. The headphone output can generate

a clean 40mW into 32

Ω load from a 3.3V supply.. The

•

Differential Input

device has differential inputs and uses external gain

•

Power Sense UVP for Brown Out Protection

setting resistors that supports a gain range of -1V/V

•

Short Circuit and Thermal Protection

to -10V/V. Headphone and line outputs have ±8kV

IEC ESD protection enabling a simple ESD protection

•

±8kV IEC ESD Protection

circuit. The DRV604 has built-in enable control for

•

Footprint Compatible with DRV602 and

pop-free on/off control. DRV604 can monitor an

DRV603

external supply voltage using its built in comparator

•

Supports Dual Line Driver Configuration

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.

1

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.

2

DirectPath, FilterPro are trademarks of Texas Instruments.

3

Blu-ray Disc is a trademark of Blu-ray Disc Association.

PRODUCTION DATA information is current as of publication date.

Copyright © 2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.