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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

DRV632

SLOS681C – JANUARY 2011 – REVISED AUGUST 2019

DRV632 DirectPath™, 2-VRMS Audio Line Driver With Adjustable Gain

1

1 Features

1

•

Stereo DirectPath™ Audio Line Driver

–

2 Vrms Into 10 k

Ω With 3.3-V Supply

•

Low THD+N < 0.01% at 2 Vrms Into 10 k

Ω

•

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

2 Applications

•

Set-Top Boxes

•

Blu-ray Disc™, DVD Players

•

LCD and PDP TV

•

Mini/Micro Combo Systems

•

Sound Cards

•

Laptops

3 Description

The DRV632 is a 2-VRMS 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 VRMS

into a 10-k

Ω 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-VRMS output.

The DRV632 does not require a power supply greater

than 3.3 V to generate its 5.6-Vpp 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-VRMS output.

The DRV632 is available in a 14-pin TSSOP.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

DRV632

TSSOP (14)

5.00 mm × 4.40 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Diagram