TPA122
150-mW STEREO AUDIO POWER AMPLIFIER
SLOS211C – AUGUST1998 – REVISED MARCH 2000
D
D
D
D
D
D
D
150 mW Stereo Output
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
– SOIC
Pin Compatible With LM4880 and LM4881
(SOIC)
D OR DGN PACKAGE
(TOP VIEW)
V
O
1
IN –
BYPASS
GND
1
2
3
4
8
7
6
5
V
DD
V
O
2
IN2 –
SHUTDOWN
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
RF
Audio
Input
RI
CI
3
Audio
Input
RI
CI
From Shutdown
Control Circuit
RF
5
CB
6
IN 2–
2
IN 1–
320 kΩ
320 kΩ
VDD 8
CS
VDD
VDD/2
–
+
VO1 1
CC
BYPASS
–
+
SHUTDOWN
VO2 7
CC
Bias
Control
4
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
TI [ TEXAS INSTRUMENTS ]
