EUA5212
2-W Stereo Audio Power Amplifier
with Four Selectable Gain Settings
DESCRIPTOIN
The EUA5212 is a stereo audio power amplifier. When
driving 1 W into 8-Ω speakers, the EUA5212 has less than
0.8% THD+N across its specified frequency range. Included
within this device is integrated depop circuitry that virtually
eliminates transients that cause noise in the speakers.
Amplifier gain is internally configured and controlled by way
of two terminals (GAIN0 and GAIN1). BTL gain settings of
6dB, 15.5dB, 21.5dB and 27.6dB are provided, while SE gain
is always configured as 0dB for headphone drive. An internal
input MUX allows two sets of stereo inputs to the
amplifier .The
HP/LINE terminal allows the user to select
which MUX input is active, regardless of whether the
amplifier is in SE or BTL mode. In notebook applications,
where internal speakers are driven as BTL and the line outputs
(often headphone drive) are required to be SE, the EUA5212
automatically switches into SE mode when the SE/ BTL input
is activated, and this reduces the gain to 0dB.
The EUA5212 consumes only 6 mA of supply current during
normal operation.
FEATURES
2W per Channel Output Power Into 3-Ω Load
Internal Gain Control, Which Eliminates
External Gain-Setting Components
Input MUX Select Terminal
PC-Beep Input
Depop Circuitry Integrated
Two Input Modes Allowable with Single-Ended or
Fully Differential Input
Low Supply Current and Shutdown Current
Thermal Shutdown Protection
TSSOP-24 with Thermal Pad
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
Notebook Computers
Multimedia Monitors
Digital Radios and Portable TVs
Block Diagram
DS5212 Ver 1.7 May. 2005
1