參數(shù)資料
型號： TS4975
廠商： 意法半導(dǎo)體
英文描述： Stereo Headphone Drive Amplifier with Digital Volume Control via IC Bus
中文描述： 立體聲耳機驅(qū)動集成電路放大器通過總線與數(shù)字音量控制
文件頁數(shù)： 26/33頁
文件大?。?/td> 747K
代理商： TS4975
Application Information
TS4975
26/33
4.6
Notes on PSRR measurement
What is PSRR
The PSRR is the Power Supply Rejection Ratio. The PSRR of a device is the ratio between a
power supply disturbance and the result on the output. In other words, the PSRR is the ability of
a device to minimize the impact of power supply disturbance to the output.
How we measure the PSRR
The PSRR was measured according to the schematic shown in
Figure 61
.
Figure 61. PSRR measurement schematic
Principles of operation
●
The DC voltage supply (Vcc) is fixed
The AC sinusoidal ripple voltage (Vripple) is fixed
No bypasss capacitor Cs is used
●
●
The PSRR value for each frequency is calculated as:
RMS is a rms selective measurement.
PSRR
20Log---------------------------------- dB
Output
RMS
Vripple
(
)
(
)
)
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS4975_05 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Stereo Headphone Drive Amplifier with Digital Volume Control via I2C Bus
TS4975EIJT 功能描述:音頻放大器 Stereo headphone amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4982IQT 功能描述:音頻放大器 2W Stereo Audio Amp 125 mW 16 ohm 3 lvl RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4984 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 x 1W Stereo audio power amplifier with active low standby mode
TS4984EIJT 功能描述:音頻放大器 2x1.2W stereo audio RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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