EUA5212 Datasheet, PDF (1/17 Pages) Eutech Microelectronics Inc – 2-W Stereo Audio Power Amplifier with Four Selectable Gain Settings

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
z 2W per Channel Output Power Into 3-Ω Load
z Internal Gain Control, Which Eliminates
External Gain-Setting Components
z Input MUX Select Terminal
z PC-Beep Input
z Depop Circuitry Integrated
z Two Input Modes Allowable with Single-Ended or
Fully Differential Input
z Low Supply Current and Shutdown Current
z Thermal Shutdown Protection
z TSSOP-24 with Thermal Pad
APPLICATIONS
z Notebook Computers
z Multimedia Monitors
z Digital Radios and Portable TVs
Block Diagram
DS5212 Ver 1.5 Nov. 2004
1