Filter and I/V Gain Stage

Stereo Hi−Fi

Headphone Driver

TPA6120A2

DYR > 120 dB

for Whole

System!

OUT A

OUT B

OUT C

OUT D

2.7 nF

LIN−

LIN+

RIN−

RIN+

1 kW

1 kW

LOUT

ROUT

1 kW

39.2 W

1 kW

1 kW

1 kW

1 kW

1 kW

2.7 nF

1 kW

1 kW

2.7 nF

2.7 nF

1 kW

1 kW

1/2 OPA4134

1/2 OPA4134

−IN A

−IN B

+IN B

+IN A

−IN C

−IN D

+IN D

+IN C

PCM

Audio

Data

Source

Controller

PCM1792

or

DSD1792

LRCK

BCK

DATA

RST

SCK

MDO

MC

MDI

MS

ZEROL

ZEROR

AUDIO DAC

39.2 W

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

TPA6120A2

SLOS431B – MARCH 2004 – REVISED FEBRUARY 2015

TPA6120A2 High Fidelity Headphone Amplifier

1 Features

3 Description

In applications requiring a high-power output, very

1

•

SNR of 128dB A-Weighted.

high fidelity headphone amplifier, the TPA6120A2

•

THD of 112.5dB

replaces a costly discrete design and allows music,

•

Current-Feedback Architecture

not the amplifier, to be heard. The TPA6120A2's

current-feedback AB amplifier architecture delivers

•

high bandwidth, extremely low noise, and up to

Gain = 1V/V (16

Ω Load)

128dB of dynamic range.

•

Power Supply Range: ±5V to ±15V

Three key features make current-feedback amplifiers

•

1300V/µs Slew Rate

outstanding for audio. The first feature is the high

•

Can be configured for Single Ended or Differential

slew

rate

that

prevents

odd

order

distortion

Inputs

anomalies. The second feature is current-on-demand

•

Independent Power Supplies for Low Crosstalk

at the output that enables the amplifier to respond

quickly and linearly when necessary without risk of

output distortion. When large amounts of output

2 Applications

power are suddenly needed, the amplifier can

•

Professional Audio Equipment

respond extremely quickly without raising the noise

•

HiFi Smartphone

floor of the system and degrading the signal-to-noise

ratio. The third feature is the gain-independent

•

Consumer Home Audio Equipment

frequency response that allows the full bandwidth of

•

Headphone Drivers

the amplifier to be used over a wide range of gain

settings.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

HSOP (20)

7.5mm x 12.82mm

TPA6120A2

VQFN (14)

3.5mm x 3.5mm

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

the end of the datasheet.

4 Simplified Schematic

1

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.