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参数资料
| 型号： | TS4974 |
| 厂商： | 意法半导体 |
| 英文描述： | 1W Differential Audio Power Amplifier with Up/Down Digital Volume Control Pins |
| 中文描述： | 1W的差分音频功率放大器向上/向下数字音量控制引脚 |
| 文件页数： | 3/8页 |
| 文件大小： | 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
相关PDF资料 |
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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4974_07 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1W differential audio power amplifier with up/down digital volume control pins |
| TS4974IQT | 功能描述:音频放大器 Audio Up-Dwn Volume RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TS4975 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Stereo Headphone Drive Amplifier with Digital Volume Control via I2C Bus |
| TS4975_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Stereo Headphone Drive Amplifier with Digital Volume Control via I2C Bus |
| TS4975EIJT | 功能描述:音频放大器 Stereo headphone amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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