TD9731中文资料Capless 2Vrms to 3Vrms Line Driver with Adjustable Gain数据手册Techcode规格书

描述 Description

The TD9731 is a 2Vrms to 3Vrms Pop&Click-less stereo line driver designed to allow the removal of the output dc-blocking capacitors for reduced component count and cost. The device is ideal for single supply electronics where size and cost are critical design parameters.The TD9731 is capable of driving 3Vrms into a 2.5kΩ load with 5V supply voltage. The device has single input and uses external gain setting resistors, that supports a gain range of ±1V/V to ±10V/V. The use of external gain resistors also allows the implementation of a 2nd order low pass filter to compliment DAC's and SOC converters. The TD9731 has build-in shutdown control for Pop&Click-free on/off control.Using the TD9731 in audio products can reduce component count compared to traditional methods of generating a 3Vrms output. The TD9731 doesn't require a power supply greater than 5V to generate its 8.5VPP output, nor does it require a split rail power supply. The TD9731 integrates its own charge pump to generate a negative supply rail that provides a clean, pop&click-less ground biased 3Vrms output.The TD9731 is available in Green MSOP-10 (Exposed Pad) package. It operates over an ambient temperature range of -40℃ to +85℃.The TD9722 is a stereo, differential input, single supply,and cap-free line driver, which is available in SOP-14 and TSSOP-14 packages.
The TD9722 is ground-reference output, and doesn’t need the output capacitors for DC blocking. The advantages of eliminating the output capacitor are saving the cost, eliminating component height, and improving the low frequency response.
The external gain setting is recommended using from 1V/V to 10V/V. High PSRR provides increased immunity to noise and RF rectification. TD9722 has shutdown and under-voltage detector function for Depop solution.
The TD9722 is capable of driving 2.1Vrms at 3.3V into 2.5kload, and provides short-circuit and thermal rotection.

特性 Features

Capless Structure
-Eliminates Pop/Clicks
-Eliminates Output DC-Blocking Capacitors
-Provides Flat Frequency Response DC to 20kHz
Low Noise and THD
-Typical SNR = 107dB
-Typical VN = 8μVrms
-Typical THD+N = 0.001% (f = 1kHz)
 2Vrms Output Voltage into 2.5kΩ Load with 3.3V Supply Voltage
3Vrms Output Voltage into 2.5kΩ Load with 5V Supply Voltage