AN2933 datasheet(3/10 Pages) STMICROELECTRONICS

부품명	AN2933

상세설명	Demo board user guidelines for the TS4999 filter-free stereo

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제조업체	STMICROELECTRONICS [STMicroelectronics]

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3 / 10 page

AN2933

Description of the demonstration board

3/10

Note:

An internal 300 k

Ω (+/-20%) resistor is placed between pins STBYL, STBYR, 3D and GND.

When the 3D pin is floating (S5 included), the 3D effect is switched off. When pins STBYL,

STBYR are floating (S3 and S4 included), the amplifier is in full standby mode. In full

standby (left and right channels OFF), the internal resistors of the gain and 3D effect pins

(G0, G1 and 3D) are disconnected (HiZ input).

When the 3D effect is switched on, both channels must be in operation or in shutdown mode

at the same time.

The amplifier’s inputs are capacitor-coupled, meaning that the -3 dB cut-off frequency Fc in

Hz is:

with Zin in Ω, Cin in Farads, C1 = C2 and C3 = C4.

On the TS4999 demonstration board, Cin = C1 = C2 = C3 = C4 = 220 nF. The input

impedance Zin changes with the set gain, as does FC.

More information on component calculations is available in the TS4999 datasheet.

π Z

⋅⋅

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AN2933 데이터시트(PDF) 3 Page - STMicroelectronics