Datasheet

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DRV632

www.ti.com

SLOS681A –JANUARY 2011–REVISED JULY 2013

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

Check for Samples: DRV632

FEATURES

DESCRIPTION

The DRV632 is a 2-V

RMS

pop-free stereo line driver

• Stereo DirectPath™ Audio Line Driver

designed to allow the removal of the output dc-

– 2 Vrms Into 10 kΩ With 3.3-V Supply

blocking capacitors for reduced component count and

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

cost. The device is ideal for single-supply electronics

where size and cost are critical design parameters.

• High SNR, >90 dB

• 600-Ω Output Load Compliant

Designed using TI’s patented DirectPath™

technology, The DRV632 is capable of driving 2 V

RMS

• Differential Input and Single-Ended Output

into a 10-kΩ load with 3.3-V supply voltage. The

• Adjustable Gain by External Gain-Setting

device has differential inputs and uses external gain-

Resistors

setting resistors to support a gain range of ±1 V/V to

• Low DC Offset, <1 mV

±10 V/V, and gain can be configured individually for

each channel. Line outputs have ±8-kV IEC ESD

• Ground-Referenced Outputs Eliminate DC-

protection, requiring just a simple resistor-capacitor

Blocking Capacitors

ESD protection circuit. The DRV632 has built-in

– Reduce Board Area

active-mute control for pop-free audio on/off control.

– Reduce Component Cost

The DRV632 has an external undervoltage detector

that mutes the output when the power supply is

– Improve THD+N Performance

removed, ensuring a pop-free shutdown.

– No Degradation of Low-Frequency

Using the DRV632 in audio products can reduce

Response Due to Output Capacitors

component count considerably compared to

• Short-Circuit Protection

traditional methods of generating a 2-V

RMS

output.

• Click- and Pop-Reduction Circuitry

The DRV632 does not require a power supply greater

than 3.3 V to generate its 5.6-V

output, nor does it

• External Undervoltage Mute

require a split-rail power supply. The DRV632

• Active Mute Control for Pop-Free Audio On/Off

integrates its own charge pump to generate a

Control

negative supply rail that provides a clean, pop-free

• Space-Saving TSSOP Package

ground-biased 2-V

RMS

output.

The DRV632 is available in a 14-pin TSSOP.

APPLICATIONS

• Set-Top Boxes

• Blu-ray Disc™, DVD Players

• LCD and PDP TV

• Mini/Micro Combo Systems

• Sound Cards

• Laptops

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.

2DirectPath, FilterPro are trademarks of Texas Instruments.

3Blu-ray Disc is a trademark of Blu-ray Disc Association.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (19 pages)

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DRV632 www.ti.com SLOS681A – JANUARY 2011 – REVISED JULY 2013 DirectPath™, 2-VRMS Audio Line Driver With Adjustable Gain Check for Samples: DRV632 FEATURES DESCRIPTION • The DRV632 is a 2-VRMS pop-free stereo line driver designed to allow the removal of the output dcblocking capacitors for reduced component count and cost. The device is ideal for single-supply electronics where size and cost are critical design parameters.
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DRV632 SLOS681A – JANUARY 2011 – REVISED JULY 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ORDERING INFORMATION (1) (1) TA PACKAGE DESCRIPTION –40°C to 85°C DRV632PW 14-Pin For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI Web site at www.ti.
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DRV632 www.ti.com SLOS681A – JANUARY 2011 – REVISED JULY 2013 RECOMMENDED OPERATING CONDITIONS VDD Supply voltage DC supply voltage RL Load impedance VIL Low-level input voltage Mute VIH High-level input voltage Mute TA Operating free-air temperature MIN NOM MAX 3 3.3 3.6 UNIT 0.
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DRV632 SLOS681A – JANUARY 2011 – REVISED JULY 2013 www.ti.com PW PACKAGE (TOP VIEW) +INR 1 14 +INL –INR 2 13 –INL OUTR 3 12 OUTL 11 UVP External UnderVoltage Detector GND 4 Mute 5 10 GND VSS 6 9 VDD CN 7 8 CP Charge Pump PIN FUNCTIONS PIN NAME NO.
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DRV632 www.ti.
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DRV632 SLOS681A – JANUARY 2011 – REVISED JULY 2013 www.ti.com TYPICAL CHARACTERISTICS VDD = 3.3 V , TA = 25°C, C(PUMP) = C(VSS) = 1 µF , CIN = 2.2 µF, RIN = 15 kΩ, Rfb = 30 kΩ, ROUT = 32 Ω, COUT = 1 nF (unless otherwise noted) TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT VOLTAGE TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT VOLTAGE 10 10 Active Filter Gain = 2V/V RL = 600Ω 1 1 0.1 0.1 THD+N (%) THD+N (%) Active Filter Gain = 2V/V RL = 10 kΩ 0.01 0.001 0.01 0.
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DRV632 www.ti.com SLOS681A – JANUARY 2011 – REVISED JULY 2013 TYPICAL CHARACTERISTICS (continued) VDD = 3.3 V , TA = 25°C, C(PUMP) = C(VSS) = 1 µF , CIN = 2.2 µF, RIN = 15 kΩ, Rfb = 30 kΩ, ROUT = 32 Ω, COUT = 1 nF (unless otherwise noted) CROSSTALK vs FREQUENCY 0 RL = 10 kΩ VO = 1 Vrms VREF = 1 V −20 Left to Right Right to Left Crosstalk (dBrA) −40 −60 −80 −100 −120 −140 20 100 1k Frequency (Hz) 10k 20k Figure 5.
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DRV632 SLOS681A – JANUARY 2011 – REVISED JULY 2013 www.ti.com APPLICATION INFORMATION LINE DRIVER AMPLIFIERS Single-supply line-driver amplifiers typically require dc-blocking capacitors. The top drawing in Figure 6 illustrates the conventional line-driver amplifier connection to the load and output signal. DC blocking capacitors are often large in value. The line load (typical resistive values of 600 Ω to 10 kΩ) combines with the dc blocking capacitors to form a high-pass filter.
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DRV632 www.ti.com SLOS681A – JANUARY 2011 – REVISED JULY 2013 CHARGE-PUMP FLYING CAPACITOR AND PVSS CAPACITOR The charge-pump flying capacitor serves to transfer charge during the generation of the negative supply voltage. The PVSS capacitor must be at least equal to the charge-pump capacitor in order to allow maximum charge transfer. Low-ESR capacitors are an ideal selection, and a value of 1 μF is typical.
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DRV632 SLOS681A – JANUARY 2011 – REVISED JULY 2013 www.ti.com Inverting Input Differential Input R2 C3 R1 R2 C3 C1 R3 –IN R1 R3 C1 –IN – DRV632 + C2 C2 – DRV632 + +IN C3 R1 R3 C1 R2 Figure 7. Second-Order Active Low-Pass Filter The resistor values should have a low value for obtaining low noise, but should also have a high enough value to get a small-size ac-coupling capacitor.
PAGE 11
DRV632 www.ti.com SLOS681A – JANUARY 2011 – REVISED JULY 2013 VSUP_MO R1 R3 UVP R2 LAYOUT RECOMMENDATIONS A proposed layout for the DRV632 can be seen in the DRV632EVM User's Guide, and the Gerber files can be downloaded from http://www.ti.com. To access this information, open the DRV632 product folder and look in the Tools and Software folder.
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DRV632 SLOS681A – JANUARY 2011 – REVISED JULY 2013 www.ti.com APPLICATION CIRCUIT R1 C3 C3 R1 R1 R3 R2 R2 C2 C3 R1 C2 R3 R3 + C3 LEFT – INPUT + RIGHT – INPUT R3 + C1 C1 R2 R2 DRV632 +INR –INR +INL Line Driver Line Driver –INL C1 C1 RIGHT OUTPUT OUTR UVP GND Click and Pop Suppression Short-Circuit Protection R11 GND EN VSS LEFT OUTPUT OUTL 3.
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DRV632 www.ti.com SLOS681A – JANUARY 2011 – REVISED JULY 2013 REVISION HISTORY Changes from Original (January 2011) to Revision A Page • Deleted min value for SNR and DNR in OPERATING CHARACTERISTICS table ............................................................. 3 • Changed description of UVP in PIN FUNCTIONS table .......................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device DRV632PWR Package Package Pins Type Drawing TSSOP PW 14 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2000 330.0 12.4 Pack Materials-Page 1 6.9 B0 (mm) K0 (mm) P1 (mm) 5.6 1.6 8.0 W Pin1 (mm) Quadrant 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DRV632PWR TSSOP PW 14 2000 367.0 367.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.