TPA6120A2_15 Datasheet, PDF (1/31 Pages) Texas Instruments – TPA6120A2 High Fidelity Headphone Amplifier

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TPA6120A2
SLOS431B – MARCH 2004 – REVISED FEBRUARY 2015
TPA6120A2 High Fidelity Headphone Amplifier
1 Features
•1 SNR of 128dB A-Weighted.
• THD of 112.5dB
• Current-Feedback Architecture
• Output Voltage Noise of 0.9µV_rms at
Gain = 1V/V (16Ω Load)
• Power Supply Range: ±5V to ±15V
• 1300V/µs Slew Rate
• Can be configured for Single Ended or Differential
Inputs
• Independent Power Supplies for Low Crosstalk
2 Applications
• Professional Audio Equipment
• HiFi Smartphone
• Consumer Home Audio Equipment
• Headphone Drivers
3 Description
In applications requiring a high-power output, very
high fidelity headphone amplifier, the TPA6120A2
replaces a costly discrete design and allows music,
not the amplifier, to be heard. The TPA6120A2's
current-feedback AB amplifier architecture delivers
high bandwidth, extremely low noise, and up to
128dB of dynamic range.
Three key features make current-feedback amplifiers
outstanding for audio. The first feature is the high
slew rate that prevents odd order distortion
anomalies. The second feature is current-on-demand
at the output that enables the amplifier to respond
quickly and linearly when necessary without risk of
output distortion. When large amounts of output
power are suddenly needed, the amplifier can
respond extremely quickly without raising the noise
floor of the system and degrading the signal-to-noise
ratio. The third feature is the gain-independent
frequency response that allows the full bandwidth of
the amplifier to be used over a wide range of gain
settings.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPA6120A2
HSOP (20)
VQFN (14)
7.5mm x 12.82mm
3.5mm x 3.5mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
PCM
Audio
Data
Source
Controller
AUDIO DAC
LRCK
BCK
DATA
SCK
I_OUT L−
I_OUT L+
ZEROL
ZEROR
MS
MDI
MC
MDO
RST
PCM1792
or
DSD1792
I_OUT R+
I_OUT R−
Filter and I/V Gain Stage
1/2 OPA4134
C_F 2.7 nF
R_F
−IN A
+IN A
+IN B
−IN B
R_F
1 kW
OUT A ^RI
1 kW
OUT B ^RI
1 kW
1 kW
C_F 2.7 nF
1/2 OPA4134
C_F 2.7 nF
+IN C
−IN C
+IN D
−IN D
R_F 1 kW
OUT C ^RI
1 kW
OUT D ^RI
R_F 1 kW
1 kW
C_F 2.7 nF
Stereo Hi−Fi
Headphone Driver
TPA6120A2
R_F
1 kW
LIN−
LIN+
R_F
1 kW
R_{O LOUT}
39.2 W
R_F
1 kW
RIN+
RIN−
R_F
1 kW
R_O
ROUT
39.2 W _{DYR > 120 dB}
for Whole
System!
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.