MAX9650AUA+

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MAX9650AUA+ is a highly reliable, low power, CMOS video amplifier which is designed for LCD flat panels. It comprises of four frequently used video amplifier modes, namely, differential mode (Vout1-Vout2), single-ended (Vout1+Vout2), differential-to-single-ended mode (Vout1-Vout2 → Vout1+Vout2) and variable-gain mode. It also incorporates a Difference Amplifier for implementing variable-gain applications.

The MAX9650AUA+ has an operating temperature range of -40ºC to +85ºC, which makes it ideal for a wide range of LCD applications. Its input voltage range (Vin) of 0.3V to 3.3V allows it to support almost all video formats including STV and HDTV. Furthermore, it has a flexible output voltage range (Vout) of 0.3V to 3V, enabling it to accommodate various video levels. The supply voltage range (VCC) of 2.5V to 3.3V is quite large and allows the MAX9650AUA+ to be used in a variety of portable applications.

Application Field:

The MAX9650AUA+ can be used for a wide variety of LCD applications. It is ideal for mobile displays and smart phones, since it has a low operating current of 6µA that does not draw too much power. It is also suitable for other high-definition video applications, such as monitor/LCD displays and rear projection televisions. Furthermore, it is an excellent choice for medical imaging systems, as it provides good image quality and low power consumption.

Working Principle:

The MAX9650AUA+ is based on a differential amplifier configuration, which is the primary means of achieving the necessary high gain and low noise. In this configuration, two input signals are applied across two inputs (i1 and i2) to which a reference voltage is also applied. The differential amplifier then amplifies the difference between these two input vectors to obtain the output signal. By adjusting the reference voltage and the gains of the differential amplifier, the MAX9650AUA+ can be configured to achieve the desired video signal level. The outputs Vout1 and Vout2 can then be used to power the LCD display.

The MAX9650AUA+ also incorporates a Difference Amplifier which is used to implement the variable-gain mode. This Difference Amplifier is essentially a unity-gain amplifier whose output is summed with the inverted input signal, resulting in a gain of two. The output of the Difference Amplifier can then be used to amplify the video signal, while the gain can be adjusted by varying the reference voltage. This way, the MAX9650AUA+ can be used to achieve a wide range of video signal levels.

The MAX9650AUA+ is extremely compact, reliable, and efficient, as it provides maximum performance with minimal power draw. Its wide supply voltage range and wide input/output voltage ranges make it perfect for a variety of LCD applications. Its low-noise differential amplifier and Difference Amplifier allow it to achieve high-quality video signals with minimal noise.

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