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TS4890 Datasheet(PDF) 41 Page - STMicroelectronics

Part # TS4890
Description  Rail-to-rail output 1 W audio power amplifier with standby mode active low
PDF  46 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TS4890 Datasheet(HTML) 41 Page - STMicroelectronics

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TS4890
Application information
46
Figure 110. PSRR measurement schematic
Principle of operation
•
We fixed the DC voltage supply (Vcc)
•
We fixed the AC sinusoidal ripple voltage (Vripple)
•
No bypass capacitor Cs is used
The PSRR value for each frequency is:
Remark: The measure of the Rms voltage is not an Rms selective measure but a full range
(2 Hz to 125 kHz) Rms measure. It means that we measure the effective Rms signal + the
noise.
PSRR dB
()
20
Log
10
×
Rms V
ripple
()
Rms Vs
-
Vs
+
–
()
-------------------------------------------
=



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