Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Audio amplifier Headphones (2-channel, stereo) Class AB MSOP 10 PowerPad

www.ti.com

FEATURES

IN1–

IN1+

BYPASS

GND

IN2–

IN2+

SHUTDOWN

DGQ PACKAGE

(TOP VIEW)

DESCRIPTION

TYPICAL APPLICATION CIRCUIT

Right In

(Differential)

Bias

Control

IN1–

BYPASS

325 kΩ 325 kΩ

(B)

(S)

IN2+

From

Shutdown

Control Circuit

–

(C)

IN1+

SHUTDOWN

IN2–

–

Left In

(Differential)

TPA6112A2

SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004

150-mW STEREO AUDIO POWER AMPLIFIER

• 150 mW Stereo Output

• Differential Inputs

• PC Power Supply Compatible

– Fully Specified for 3.3 V and 5 V Operation

– Operation to 2.5 V

• Pop Reduction Circuitry

• Internal Mid-Rail Generation

• Thermal and Short-Circuit Protection

• Surface-Mount Packaging

– PowerPAD™ MSOP

The TPA6112A2 is a stereo audio power amplifier with differential inputs packaged in a 10-pin PowerPAD MSOP

package capable of delivering 150 mW of continuous RMS power per channel into 16- Ω loads. Amplifier gain is

externally configured by means of two resistors per input channel and does not require external compensation for

settings of 1 to 10.

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.

PowerPAD is a trademark of Texas Instruments.

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 (23 pages)

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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 150-mW STEREO AUDIO POWER AMPLIFIER FEATURES • • • • • • • DGQ PACKAGE (TOP VIEW) 150 mW Stereo Output Differential Inputs PC Power Supply Compatible – Fully Specified for 3.3 V and 5 V Operation – Operation to 2.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 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. DESCRIPTION (CONTINUED) THD+N when driving an 16-Ω load from 5 V is 0.03% at 1 kHz, and less than 1% across the audio band of 20 Hz to 20 kHz. For 32-Ω loads, the THD+N is reduced to less than 0.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 DISSIPATION RATING TABLE (1) PACKAGE TA≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING DGQ 2.14 W (1) 17.1 mW/°C 1.37 W 1.11 W Please see the Texas Instrumentsdocument, PowerPAD Thermally EnhancedPackage Application Report (literature number SLMA002), for moreinformation on the PowerPAD package.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 AC OPERATING CHARACTERISTICS VDD = 5 V, TA = 25°C, RL = 16 Ω PARAMETER TEST CONDITIONS MIN TYP MAX 150 UNIT PO Output power (each channel) THD≤ 0.1%, f = 1 kHz THD+N Total harmonic distortion + noise PO = 100 mW, 20 - 20 kHz 0.
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TPA6112A2 www.ti.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY 1 10 VDD = 5 V, PO = 60 mW, CB = 1 µF, RL = 32 Ω, THD+N − Total Harmonic Distortion + Noise − % THD+N − Total Harmonic Distortion + Noise − % 10 AV = −5 V/V AV = −1 V/V AV = −10 V/V 0.1 0.05 0.01 0.001 20 100 TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER 1k f − Frequency − Hz 1 kHz 0.01 100 500 Figure 4.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER 10 1 THD+N − Total Harmonic Distortion + Noise − % THD+N − Total Harmonic Distortion + Noise − % 10 VDD = 3.3 V, PO = 60 mW, CB = 1 µF, RL = 8 Ω, AV = −1 V/V 0.1 0.01 0.001 20 100 1k f − Frequency − Hz 1 kHz 0.01 100 Figure 8.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER 10 1 THD+N − Total Harmonic Distortion + Noise − % THD+N − Total Harmonic Distortion + Noise − % 10 VDD = 3.3 V, PO = 40 mW, CB = 1 µF, RL = 16 Ω, AV = −1 V/V 0.1 0.01 0.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 SUPPLY RIPPLE REJECTION RATIO vs FREQUENCY SUPPLY RIPPLE REJECTION RATIO vs FREQUENCY 0 0.1 µF −10 VDD = 3.3 V, RL = 16 Ω, AV = −1 V/V 0.47 µF −20 1 µF −30 −40 −50 −60 −70 −80 Bypass = 1.65 V −90 −100 −110 K SVR − Supply Ripple Rejection Ratio − dB K SVR − Supply Ripple Rejection Ratio − dB 0 −120 VDD = 5 V, RL = 16 Ω, AV = −1 V/V 0.47 µF −20 1 µF −30 −40 −50 −60 −70 −80 Bypass = 2.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 CROSSTALK vs FREQUENCY CROSSTALK vs FREQUENCY 0 10 −10 −20 Crosstalk − dB −30 THD+N − Total Harmonic Distortion + Noise − % VDD = 3.3 V, PO = 25 mW, CB = 1 µF, RL = 32 Ω, AV = −1 V/V −40 −50 −60 −70 −80 IN2− to VO1 −90 −100 −110 −120 IN1− to VO2 20 100 1k f − Frequency − Hz 0.01 AV = −10 V/V 100 1k f − Frequency − Hz Figure 20.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 CROSSTALK vs FREQUENCY CROSSTALK vs FREQUENCY 0 0 VDD = 5 V, PO = 100 mW, CB = 1 µF, RL = 16 Ω, AV = −1 V/V −10 −20 −20 −30 −40 Crosstalk − dB Crosstalk − dB −30 −50 −60 −70 −80 −50 −60 −70 IN2− to VO1 −90 −100 −100 IN1− to VO2 −110 20 0 −10 100 1k f − Frequency − Hz −120 10k 20k 20 100 1k f − Frequency − Hz Figure 23. Figure 24.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 OPEN-LOOP GAIN AND PHASE MARGIN vs FREQUENCY VDD = 3.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 SUPPLY CURRENT vs SUPPLY VOLTAGE SIGNAL-TO-NOISE RATIO vs VOLTAGE GAIN 120 2.5 SNR − Signal-to-Noise Ratio − dB VDD = 5 V I DD − Supply Current − mA 2 1.5 1 0.5 100 80 60 40 20 0 0 0.5 1 1.5 2 2.5 3 3.5 4 VDD − Supply Voltage − V 4.5 5 0 5.5 2 3 4 5 6 7 8 9 10 AV − Voltage Gain − V/V Figure 31. Figure 32.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 APPLICATION INFORMATION f c(highpass) GAIN SETTING RESISTORS, Rf and Ri The gain for the TPA6112A2 is set by resistors Rf and Ri according to Equation 1. Gain Rf Ri (1) Given that the TPA6112A2 is a MOS amplifier, the input impedance is very high. Consequently input leakage currents are not generally a concern. However, noise in the circuit increases as the value of Rf increases.
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TPA6112A2 www.ti.com SLOS342A – DECEMBER 2000 – REVISED SEPTEMBER 2004 MIDRAIL BYPASS CAPACITOR, C(B) The midrail bypass capacitor, C(B), serves several important functions. During start up, C(B) determines the rate at which the amplifier starts up. This helps to push the start-up pop noise into the subaudible range (so low it can not be heard). The second function is to reduce noise produced by the power supply caused by coupling into the output drive signal.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 25-Apr-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPA6112A2DGQR MSOPPower PAD DGQ 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 TPA6112A2DGQR MSOPPower PAD DGQ 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 25-Apr-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPA6112A2DGQR MSOP-PowerPAD DGQ 10 2500 364.0 364.0 27.0 TPA6112A2DGQR MSOP-PowerPAD DGQ 10 2500 358.0 335.0 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.