TPA122 150-mW STEREO AUDIO POWER AMPLIFIER
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SLOS211C ± AUGUST1998 ± REVISED MARCH 2000 |
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D 150 mW Stereo Output |
D OR DGN PACKAGE |
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(TOP VIEW) |
DPC Power Supply Compatible
± Fully Specified for 3.3 V and 5 V |
VO1 |
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1 |
8 |
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VDD |
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Operation |
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IN ± |
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2 |
7 |
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VO2 |
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± Operation to 2.5 V |
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BYPASS |
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3 |
6 |
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IN2 ± |
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D Pop Reduction Circuitry |
GND |
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4 |
5 |
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SHUTDOWN |
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DInternal Mid-Rail Generation
DThermal and Short-Circuit Protection
DSurface-Mount Packaging
±PowerPAD MSOP
±SOIC
DPin Compatible With LM4880 and LM4881 (SOIC)
description
The TPA122 is a stereo audio power amplifier packaged in either an 8-pin SOIC, or an 8-pin PowerPAD MSOP package capable of delivering 150 mW of continuous RMS power per channel into 8-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.
THD+N when driving an 8-Ω load from 5 V is 0.1% at 1 kHz, and less than 2% across the audio band of 20 Hz to 20 kHz. For 32-Ω loads, the THD+N is reduced to less than 0.06% at 1 kHz, and is less than 1% across the audio band of 20 Hz to 20 kHz. For 10-kΩ loads, the THD+N performance is 0.01% at 1 kHz, and less than 0.02% across the audio band of 20 Hz to 20 kHz.
typical application circuit |
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RF |
320 kΩ |
320 kΩ |
VDD |
8 |
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VDD |
Audio |
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VDD/2 |
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CS |
Input |
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RI |
2 |
IN 1± |
± |
VO1 |
1 |
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CI |
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+ |
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CC |
3 |
BYPASS |
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Audio |
CB |
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Input |
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RI |
6 |
IN 2± |
± |
VO2 |
7 |
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CI |
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+ |
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CC |
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From Shutdown |
5 |
SHUTDOWN |
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Bias |
4 |
Control Circuit |
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Control |
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RF |
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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 Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2000, Texas Instruments Incorporated
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
1 |
TPA122
150-mW STEREO AUDIO POWER AMPLIFIER
SLOS211C ± AUGUST1998 ± REVISED MARCH 2000
AVAILABLE OPTIONS
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PACKAGED DEVICES |
MSOP |
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TA |
SMALL OUTLINE² |
MSOP² |
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Symbolization |
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(D) |
(DGN) |
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± 40°C to 85°C |
TPA122D |
TPA122DGN |
TI AAE |
²The D and DGN package is available in left-ended tape and reel only (e.g., TPA122DR, TPA122DGNR).
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Terminal Functions |
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TERMINAL |
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I/O |
DESCRIPTION |
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NAME |
NO. |
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BYPASS |
3 |
I |
Tap to voltage divider for internal mid-supply bias supply. Connect to a 0.1 F to 1 F low ESR capacitor for |
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best performance. |
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GND |
4 |
I |
GND is the ground connection. |
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IN1± |
2 |
I |
IN1± is the inverting input for channel 1. |
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IN2± |
6 |
I |
IN2± is the inverting input for channel 2. |
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SHUTDOWN |
5 |
I |
Puts the device in a low quiescent current mode when held high |
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VDD |
8 |
I |
VDD is the supply voltage terminal. |
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VO1 |
1 |
O |
VO1 is the audio output for channel 1. |
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VO2 |
7 |
O |
VO2 is the audio output for channel 2. |
absolute maximum ratings over operating free-air temperature (unless otherwise noted)²
Supply voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . 6 |
V |
Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
±0.3 V to VDD + 0.3 |
V |
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . internally limited |
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Operating junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . ±40°C to 150°C |
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Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . ±65°C to 150°C |
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Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . 260°C |
²Stresses beyond those listed under ªabsolute maximum ratingsº may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DISSIPATION RATING TABLE
PACKAGE |
TA ≤ 25°C |
DERATING FACTOR |
TA = 70°C |
TA = 85°C |
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POWER RATING |
ABOVE TA = 25°C |
POWER RATING |
POWER RATING |
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D |
725 mW |
5.8 mW/°C |
464 mW |
377 mW |
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DGN |
2.14 W³ |
17.1 mW/°C |
1.37 W |
1.11 W |
³Please see the Texas Instruments document, PowerPAD Thermally Enhanced Package Application Report
(literature number SLMA002), for more information on the PowerPAD package. The thermal data was measured on a PCB layout based on the information in the section entitled Texas Instruments Recommended Board for PowerPAD on page 33 of the before mentioned document.
recommended operating conditions
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MIN |
MAX |
UNIT |
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Supply voltage, VDD |
2.5 |
5.5 |
V |
Operating free-air temperature, TA |
±40 |
85 |
°C |
2 |
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
TPA122 150-mW STEREO AUDIO POWER AMPLIFIER
SLOS211C ± AUGUST1998 ± REVISED MARCH 2000
dc electrical characteristics at TA = 25°C, VDD = 3.3 V
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PARAMETER |
TEST CONDITIONS |
MIN TYP |
MAX |
UNIT |
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VIO |
Input offset voltage |
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5 |
mV |
PSRR |
Power supply rejection ratio |
VDD = 3.2 V to 3.4 V |
83 |
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dB |
IDD |
Supply current |
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1.5 |
3 |
mA |
IDD(SD) |
Supply current in SHUTDOWN mode |
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10 |
50 |
µA |
ZI |
Input impedance |
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> 1 |
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MΩ |
ac operating characteristics, VDD = 3.3 V, TA = 25°C, RL = 8 Ω
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PARAMETER |
TEST CONDITIONS |
MIN TYP |
MAX |
UNIT |
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PO |
Output power (each channel) |
THD ≤ 0.1% |
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70² |
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mW |
THD+N |
Total harmonic distortion + noise |
PO = 70 mW, |
20±20 kHz |
2% |
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BOM |
Maximum output power BW |
G = 10, |
THD <5% |
>20 |
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kHz |
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Phase margin |
Open loop |
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58° |
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Supply ripple rejection |
f = 1 kHz |
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68 |
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dB |
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Channel/Channel output separation |
f = 1 kHz |
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86 |
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dB |
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SNR |
Signal-to-noise ratio |
PO = 100 mW |
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100 |
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dB |
Vn |
Noise output voltage |
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9.5 |
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µV(rms) |
² Measured at 1 kHz
dc electrical characteristics at TA = 25°C, VDD = 5 V
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PARAMETER |
TEST CONDITIONS |
MIN TYP |
MAX |
UNIT |
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VIO |
Input offset voltage |
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5 |
mV |
PSRR |
Power supply rejection ratio |
VDD = 4.9 V to 5.1 V |
76 |
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dB |
IDD |
Supply current |
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1.5 |
3 |
mA |
IDD(SD) |
Supply current in SHUTDOWN mode |
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60 |
100 |
µA |
ZI |
Input impedance |
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> 1 |
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MΩ |
ac operating characteristics, VDD = 5 V, TA = 25°C, RL = 8 Ω
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PARAMETER |
TEST CONDITIONS |
MIN TYP |
MAX |
UNIT |
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PO |
Output power (each channel) |
THD ≤ 0.1% |
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70² |
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mW |
THD+N |
Total harmonic distortion + noise |
PO = 150 mW, |
20±20 kHz |
2% |
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BOM |
Maximum output power BW |
G = 10, |
THD <5% |
>20 |
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kHz |
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Phase margin |
Open loop |
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56° |
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Supply ripple rejection ratio |
f = 1 kHz |
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68 |
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dB |
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Channel/channel output separation |
f = 1 kHz |
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86 |
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dB |
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SNR |
Signal-to-noise ratio |
PO = 150 mW |
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100 |
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dB |
Vn |
Noise output voltage |
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9.5 |
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µV(rms) |
² Measured at 1 kHz
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
3 |
TPA122
150-mW STEREO AUDIO POWER AMPLIFIER
SLOS211C ± AUGUST1998 ± REVISED MARCH 2000
ac operating characteristics, VDD = 3.3 V, TA = 25°C, RL = 32 Ω
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PARAMETER |
TEST CONDITIONS |
MIN TYP |
MAX |
UNIT |
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P |
Output power (each channel) |
THD ≤ 0.1% |
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40² |
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mW |
O |
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THD+N |
Total harmonic distortion + noise |
PO = 30 mW, |
20±20 kHz |
0.5% |
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BOM |
Maximum output power BW |
G = 10, |
THD <2% |
>20 |
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kHz |
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Phase margin |
Open loop |
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58° |
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Supply ripple rejection |
f = 1 kHz |
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68 |
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dB |
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Channel/channel output separation |
f = 1 kHz |
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86 |
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dB |
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SNR |
Signal-to-noise ratio |
PO = 100 mW |
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100 |
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dB |
Vn |
Noise output voltage |
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9.5 |
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V(rms) |
² Measured at 1 kHz
ac operating characteristics, VDD = 5 V, TA = 25°C, RL = 32 Ω
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PARAMETER |
TEST CONDITIONS |
MIN TYP |
MAX |
UNIT |
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PO |
Output power (each channel) |
THD ≤ 0.1% |
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40² |
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mW |
THD+N |
Total harmonic distortion + noise |
PO = 60 mW, |
20±20 kHz |
0.4% |
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BOM |
Maximum output power BW |
G = 10, |
THD <2% |
>20 |
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kHz |
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Phase margin |
Open loop |
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56° |
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Supply ripple rejection |
f = 1 kHz |
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68 |
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dB |
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Channel/channel output separation |
f = 1 kHz |
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86 |
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dB |
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SNR |
Signal-to-noise ratio |
PO = 150 mW |
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100 |
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dB |
Vn |
Noise output voltage |
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9.5 |
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V(rms) |
² Measured at 1 kHz
4 |
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
TPA122 150-mW STEREO AUDIO POWER AMPLIFIER
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SLOS211C ± AUGUST1998 ± REVISED MARCH 2000 |
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TYPICAL CHARACTERISTICS |
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Table of Graphs |
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FIGURE |
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1, 2, 4, 5, 7, 8, |
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vs Frequency |
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10, 11, 13, 14, |
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THD+N |
Total harmonic distortion plus noise |
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16, 17, 34, 36 |
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vs Power output |
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3, 6, 9, |
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12, 15, 18 |
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Supply ripple rejection |
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vs Frequency |
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19, 20 |
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Vn |
Output noise voltage |
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vs Frequency |
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21, 22 |
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Crosstalk |
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vs Frequency |
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23 ± 26, |
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37, 38 |
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Mute attenuation |
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vs Frequency |
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27, 28 |
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Open-loop gain and phase margin |
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vs Frequency |
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29, 30 |
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Output power |
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vs Load resistance |
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31, 32 |
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Closed-Loop gain and phase |
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vs Frequency |
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39 ± 44 |
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Output power |
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vs Load resistance |
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31, 32 |
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IDD |
Supply current |
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vs Supply voltage |
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33 |
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SNR |
Signal-to-noise ratio |
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vs Voltage gain |
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35 |
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Closed-loop gain |
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vs Frequency |
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39 ± 44 |
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Power dissipation/amplifier |
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vs Output power |
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45, 46 |
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POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
5 |
TPA122
150-mW STEREO AUDIO POWER AMPLIFIER
SLOS211C ± AUGUST1998 ± REVISED MARCH 2000
TYPICAL CHARACTERISTICS
TOTAL HARMONIC DISTORTION PLUS NOISE
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vs |
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FREQUENCY |
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% |
10 |
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VDD = 3.3 V |
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± |
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PO = 30 mW |
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+ Noise |
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CB = 1 µ F |
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1 |
RL = 32 Ω |
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AV = ±5 V/V |
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Distortion |
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AV = ±10 V/V |
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Harmonic |
0.1 |
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THD+N ±Total |
0.01 |
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AV = ±1 V/V |
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0.001 |
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20 |
100 |
1k |
10k |
20k |
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f ± Frequency ± Hz |
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Figure 1
TOTAL HARMONIC DISTORTION PLUS NOISE
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vs |
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FREQUENCY |
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% |
10 |
VDD = 3.3 V |
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± |
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AV = ±1 V/V |
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+ Noise |
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RL = 32 Ω |
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1 |
CB = 1 µ F |
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Distortion |
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PO = 15 mW |
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Harmonic |
0.1 |
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PO = 10 mW |
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±Total |
0.01 |
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THD+N |
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PO = 30 mW |
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0.001 |
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20 |
100 |
1k |
10k |
20k |
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f ± Frequency ± Hz |
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Figure 2
TOTAL HARMONIC DISTORTION PLUS NOISE |
TOTAL HARMONIC DISTORTION PLUS NOISE |
vs |
vs |
OUTPUT POWER |
FREQUENCY |
% |
10 |
VDD = 3.3 V |
% |
10 |
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V |
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= 5 V |
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± |
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RL = 32 Ω |
± |
DD |
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P |
= 60 mW |
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Noise+ |
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AV = ±1 V/V |
Noise+ |
O |
= 32 Ω |
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1 |
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RL |
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CB = 1 µF |
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CB = 1 µF |
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Distortion |
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20 kHz |
Distortion |
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1 |
10 kHz |
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AV = ±10 V/V |
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Harmonic |
0.1 |
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Harmonic |
0.1 |
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AV = ±5 V/V |
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±Total |
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1 kHz |
±Total |
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20 Hz |
0.01 |
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THD+N |
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THD+N |
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AV = ±1 V/V |
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0.01 |
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0.001 |
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1 |
10 |
50 |
20 |
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100 |
1k |
10k |
20k |
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PO ± Output Power ± mW |
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f ± Frequency ± Hz |
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Figure 3 |
Figure 4 |
6 |
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
TPA122 150-mW STEREO AUDIO POWER AMPLIFIER
SLOS211C ± AUGUST1998 ± REVISED MARCH 2000
TYPICAL CHARACTERISTICS
TOTAL HARMONIC DISTORTION PLUS NOISE |
TOTAL HARMONIC DISTORTION PLUS NOISE |
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vs |
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vs |
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FREQUENCY |
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OUTPUT POWER |
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± % |
10 |
VDD = 5 V |
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10 |
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± % |
V |
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= 5 V |
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RL = 32 Ω |
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DD |
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A |
= ±1 V/V |
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Noise |
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AV = ±1 V/V |
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Noise |
V |
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RL = 32 Ω |
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1 |
CB = 1 µF |
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CB = 1 µF |
|
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||||
+ |
|
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+ |
|
|
20 kHz |
|
|
|
Distortion |
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Distortion |
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1 |
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||
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10 kHz |
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||
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PO = 30 mW |
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|||
Harmonic |
0.1 |
|
Harmonic |
|
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||
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|||
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PO = 15 mW |
|
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0.1 |
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||
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|||
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1 kHz |
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||
±Total |
0.01 |
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±Total |
|
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20 Hz |
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|||
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||
THD+N |
|
PO = 60 mW |
|
THD+N |
|
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|
|
|
0.001 |
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|
0.01 |
|
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||
|
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||
|
20 |
100 |
1k |
10k |
20k |
0.002 |
|
0.01 |
0.1 |
0.2 |
|
|
|
f ± Frequency ± Hz |
|
|
|
|
PO ± Output Power ± W |
|
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|
Figure 5 |
|
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|
|
Figure 6 |
|
|
TOTAL HARMONIC DISTORTION PLUS NOISE |
TOTAL HARMONIC DISTORTION PLUS NOISE |
|
|
|
vs |
|
|
|
|
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|
vs |
|
|
|
|
|
|
FREQUENCY |
|
|
|
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|
|
FREQUENCY |
|
|
|
± % |
10 |
VDD = 3.3 V |
|
|
|
|
10 |
|
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|
|
|
|
|
|
|
|
± % |
V |
|
= 3.3 V |
|
|
|
|
||
|
RL = 10 kΩ |
|
|
|
DD |
|
|
|
|
|
|||
1 |
|
|
|
RL = 10 kΩ |
|
|
|
|
|||||
Noise+ |
PO = 100 µF |
|
|
|
Noise+ |
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
A |
= ±1 V/V |
|
|
|
|
||
|
|
CB = 1 µF |
|
|
|
|
V |
|
|
|
|
|
|
|
|
|
|
|
|
CB = 1 µF |
|
|
|
|
|||
Distortion |
|
AV = ±5 V/V |
|
|
Distortion |
|
|
|
|
|
|
|
|
Harmonic |
0.1 |
|
|
|
|
Harmonic |
0.1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
±Total |
|
|
|
|
|
±Total |
|
|
PO = 45 µW |
|
|
|
|
0.01 |
|
|
|
|
0.01 |
|
|
|
|
|
|
||
THD+N |
|
|
|
|
THD+N |
|
|
|
|
|
|
||
|
|
|
AV = ±2 V/V |
|
|
|
|
P |
O |
= 90 µW |
|
||
|
|
|
|
|
|
|
|
|
PO = 130 µW |
|
|
||
|
0.001 |
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
0.001 |
|
|
|
|
|
|
|
|
20 |
100 |
1k |
10k |
20k |
|
20 |
|
100 |
1k |
|
10k |
20k |
|
|
|
f ± Frequency ± Hz |
|
|
|
|
|
f ± Frequency ± Hz |
|
|
|
Figure 7 |
Figure 8 |
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
7 |
TPA122
150-mW STEREO AUDIO POWER AMPLIFIER
SLOS211C ± AUGUST1998 ± REVISED MARCH 2000
TYPICAL CHARACTERISTICS
THD+N ±Total Harmonic Distortion + Noise ± %
TOTAL HARMONIC DISTORTION PLUS NOISE vs
OUTPUT POWER
10 |
VDD = 3.3 V |
RL = 10 kΩ |
AV = ±1 V/V |
CB = 1 µF |
1 |
0.1 |
20 Hz |
10 kHz |
0.01 |
20 Hz |
1 kHz
0.001
5 |
10 |
100 |
200 |
PO ± Output Power ± µW
Figure 9
TOTAL HARMONIC DISTORTION PLUS NOISE
|
|
|
vs |
|
|
|
|
|
FREQUENCY |
|
|
% |
10 |
VDD = 5 V |
|
|
|
|
|
|
|
||
± |
|
RL = 10 kΩ |
|
|
|
+ Noise |
|
|
|
|
|
|
PO = 300 µW |
|
|
|
|
1 |
CB = 1 µF |
|
|
|
|
Distortion |
|
|
|
|
|
Harmonic |
0.1 |
|
AV = ±5 V/V |
|
|
|
|
|
|
||
|
AV = ±1 V/V |
|
|
||
|
|
|
|
|
|
±Total |
0.01 |
|
|
|
|
|
|
|
|
|
|
THD+N |
|
|
AV = ±2 V/V |
|
|
0.001 |
|
|
|
|
|
|
|
|
|
|
|
|
20 |
100 |
1k |
10k |
20k |
|
|
|
f ± Frequency ± Hz |
|
|
Figure 10
TOTAL HARMONIC DISTORTION PLUS NOISE |
TOTAL HARMONIC DISTORTION PLUS NOISE |
|
|
|
vs |
|
|
|
|
vs |
|
|
|
|
FREQUENCY |
|
|
|
|
OUTPUT POWER |
|
% |
10 |
VDD = 5 V |
|
|
|
10 |
|
|
|
|
|
|
% |
|
V = 5 V |
|
|
||
± |
|
RL = 10 kΩ |
|
|
± |
|
DD |
|
|
|
|
|
|
RL = 10 kΩ |
|
|
|||
Noise+ |
1 |
|
|
Noise+ |
1 |
|
|
||
CB = 1 µF |
|
|
CB = 1 µ F |
|
|
||||
|
|
AV = ±1 V/V |
|
|
|
|
A = ±1 V/V |
|
|
|
|
|
|
|
|
|
V |
|
|
Distortion |
|
|
PO = 300 µW |
|
Distortion |
|
|
|
|
Harmonic |
0.1 |
|
PO |
= 200 µW |
Harmonic |
0.1 |
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
20 Hz |
|
||
±Total |
|
|
|
|
±Total |
|
|
20 kHz |
|
0.01 |
|
|
|
0.01 |
|
|
|
||
THD+N |
|
|
|
THD+N |
|
|
|
||
|
PO = 100 µW |
|
|
|
10 kHz |
1 kHz |
|||
|
|
|
|
|
|
||||
|
0.001 |
|
|
|
|
0.001 |
|
|
|
|
20 |
100 |
1k |
10k |
20k |
5 |
10 |
100 |
500 |
|
|
|
f ± Frequency ± Hz |
|
|
|
PO ± Output Power ± µW |
||
|
|
|
Figure 11 |
|
|
|
|
Figure 12 |
|
8 |
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |