line driver. TDA8574 Datasheet
Class-H high-output voltage level
Supersedes data of 1997 Feb 26
File under Integrated Circuits, IC01
1998 Oct 16
Class-H high-output voltage level line
• Output voltage swing larger than supply voltage
• High supply voltage ripple rejection
• Low distortion
• Low noise
• ESD protected on all pins.
The TDA8574(T) is a two channel class-H high-output
voltage line driver for use in car audio applications.
The line driver behaves as a non-inverting amplifier with a
gain of 8 dB and a single-ended output. Due to the class-H
voltage lifting principle the voltage swing over the load is
more than the supply voltage. With a supply voltage of 9 V
the output voltage swing over the load will be
14 V (peak-to-peak).
The TDA8574 is available in a DIP16 package and the
TDA8574T in a SO16 package.
Line drivers are necessary in car audio systems in which
the power amplifiers are driven by long cables.
The signal-to-noise ratio of these car audio systems is
improved by using the TDA8574(T) class-H high-output
level line driver. The high-output level of TDA8574(T)
enables a reduction of the gain of the power amplifier
resulting in an improvement of the power amplifier
QUICK REFERENCE DATA
maximal output voltage (RMS value)
supply voltage ripple rejection
total harmonic distortion
noise output voltage
VCC = 9 V
THD = 0.1%
Vo(rms) = 3 V; f = 1 kHz
plastic small outline package; 16 leads; body width 7.5 mm
plastic dual in-line package; 16 leads (300 mil)
1998 Oct 16