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參數(shù)資料
| 型號(hào)： | TS4974 |
| 廠(chǎng)商： | 意法半導(dǎo)體 |
| 英文描述： | 1W Differential Audio Power Amplifier with Up/Down Digital Volume Control Pins |
| 中文描述： | 1W的差分音頻功率放大器向上/向下數(shù)字音量控制引腳 |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大?。?/td> | 150K |
| 代理商： | TS4974 |
Application Information
TS4974
3/8
1 Application Information
Figure 1: Typical application schematics
Operation Mode
The TS4974 is a fully differential power amplifier which enables better performances in terms of noise
immunity and PSRR.
The TS4974 features a digital volume control with an internal gain range from -33dB up to +12dB, by
steps of 3dB. When the device is firstly biased, an initial gain of -12dB is internally fixed. When standby
mode is activated, the gain value is memorized and held until standby is released.
The volume is controlled by means of two pins UP and DOWN on which the application of a VIL voltage
will activate the increase or decrease in gain. The TS4974 integrates a debouncing system which does
not allow to take into account UP or DOWN pulse shorter than T
debounce
time. Moreover an autorepeat
function is implemented. When a continuous voltage is applied on UP or DOWN pin, the gain is
continuously increased or decreased after a certain time called T
autorepeat
. The first period of each
autorepeat sequence is longer ( x1.5T
auto
) to avoid any parasitic activation. In this operational mode,
T
range
time is necessary to cover the whole gain range of the device.
BIAS
CONTROL
GND
VCC
UP
DOWN
8
TS4974
Cb
1μF
+
330nF
+
+
330nF
OUT1
STBY
STDBY
BYPASS
OUT2
INPUT STAGE
Vin+
Vin-
Cs
+
1μF
DIGITAL VOLUME
DIFFERENTIAL
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS4974IQT | 1W Differential Audio Power Amplifier with Up/Down Digital Volume Control Pins |
| TS4984IQT | 2 x 1W Stereo audio power amplifier with active low standby mode |
| TS4984 | 2 x 1W Stereo audio power amplifier with active low standby mode |
| TS4985 | 2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
| TS4985EIJT | 2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS4974_07 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:1W differential audio power amplifier with up/down digital volume control pins |
| TS4974IQT | 功能描述:音頻放大器 Audio Up-Dwn Volume RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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 |
| TS4975 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Stereo Headphone Drive Amplifier with Digital Volume Control via I2C Bus |
| TS4975_05 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):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(lèi)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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