Details

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BUY STA328 https://www.utsource.net/itm/p/1366332.html
2.1-channel high-efficiency digital audio system

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VDD	Operating	2.7	-	5.5	V
Output Power	POM	BTL, RL=4Ω, THD=10%	-	2x1.8	-	W
Quiescent Current	IQ	Standby	-	30	-	μA
Shutdown Current	ISD	VSD ≤ 0.8V	-	0.1	-	μA
Signal-to-Noise Ratio	SNR	A-weighted	-	96	-	dB
Total Harmonic Distortion	THD	Po = 1W, RL=4Ω	-	0.05	-	%

Instructions for STA328

1. Power Supply Connection:

   • Connect the supply voltage (VDD) between 2.7V and 5.5V to the VDD pin.
   • Ensure a stable power supply to avoid noise interference.

2. Speaker Configuration:

   • For bridge-tied load (BTL) configuration, connect speakers with a resistance of 4Ω for optimal output power without exceeding 10% THD.

3. Quiescent and Shutdown States:

   • In standby mode, the quiescent current is approximately 30μA.
   • To enter shutdown mode, apply a voltage less than or equal to 0.8V to the shutdown pin (VSD), reducing the current draw to about 0.1μA.

4. Signal Quality:

   • The signal-to-noise ratio (SNR) is typically 96dB, ensuring high-quality audio reproduction.
   • Keep total harmonic distortion (THD) below 0.05% when operating at 1W output power with a 4Ω load for clear sound.

5. Installation and Mounting:

   • Ensure proper heat dissipation if operating near maximum power levels.
   • Place the device away from sources of electromagnetic interference for best performance.

(For reference only)