Datasheet > EC5579-HF

EC5579-HF

更新时间： 2022-05-14 22:22:20

品牌	Logo	应用领域
飞虹 - E-CMOS		/
页数	文件大小	规格书
12页	825K
描述
181 Channel Voltage Buffers for TFT LCD

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EC5579-HF 数据手册

EC5579

18+1 Channel Voltage Buffers for TFT LCD

Applications Information

Product Description

The EC5579 rail-to-rail quad channels amplifier is built on an advanced high voltage CMOS process. It’s beyond

rails input capability and full swing of output range made itself an ideal amplifier for use in a wide range of

general-purpose applications. The features of 1µS high slew rate, fast settling time, 2MHz of GBWP as well as high

output driving capability have proven the EC5579 a good voltage reference buffer in TFT-LCD for grayscale

reference applications. High phase margin and extremely low power consumption (500µA per amplifier) make the

EC5579 ideal for Connected in voltage follower mode for low power high drive applications

Supply Voltage, Input Range and Output Swing

The EC5579 can be operated with a single nominal wide supply voltage ranging from 6.5V to 18V with stable

performance over operating temperatures of -20 °C to +85 °C.

With 500mV greater than rail-to-rail input common mode voltage range and 75dB of Common Mode Rejection Ratio,

the EC5579 allows a wide range sensing among many applications without having any concerns over exceeding the

range and no compromise in accuracy. The output swings of the EC5579 typically extend to within 80mV of positive

and negative supply rails with load currents of 5mA. The output voltage swing can be even closer to the supply rails

by merely decreasing the load current. Figure 1 shows the input and output waveforms for the device in the

unity-gain configuration. The amplifier is operated under ±5V supply with a 10k. load connected to GND. The input is

a 10Vp-p sinusoid. An approximately 9.985 Vp-p of output voltage swing can be easily achieved.

Figure10. Operation with Rail-to-Rail Input and Output

Output Short Circuit Current Limit

A +/-120mA short circuit current will be limited by the EC5579 if the output is directly shorted to the positive

or the negative supply. For an indefinitely output short circuit, the power dissipation could easily increase such that

the device may be damaged. The internal metal interconnections are well designed to prevent the output continuous

current from exceeding +/-30 mA such that the maximum reliability can be well maintained.

E-CMOS Corp. (www.ecmos.com.tw)

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2007/06/29

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