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MAX4118ESA Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX4118ESA Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 12 page FUNCTION _____________________________________________________________Pin Descriptions _______________Detailed Description The MAX4112/MAX4117/MAX4119 are optimized for closed-loop gains (AVCL) of 2V/V or greater, while the MAX4113/MAX4118/MAX4120 are optimized for closed-loop gains of 8V/V or greater. These low-power, high-speed, current feedback amplifiers operate from ±5V supplies. They are designed to drive video loads with low distortion characteristics. The MAX4112/ MAX4117/MAX4119’s differential gain and phase are 0.02% and 0.03°, respectively; the MAX4113/ MAX4118/MAX4120 exhibit gain/phase error specifica- tions of 0.02% and 0.04°, respectively. These charac- teristics, plus a wide 0.1dB gain flatness, make the MAX4112/MAX4113/MAX4117–MAX4120 ideal for use in broadcast and graphics video systems. The combi- nation of ultra-high speed and low power makes these parts suitable for use in general-purpose, high-speed applications, such as medical imaging, industrial instru- mentation, and communications systems. __________Applications Information Theory of Operation Since these devices are current-feedback amplifiers, their open-loop transfer function is expressed as a transimpedance, ∆VOUT/∆IIN, or ZOL. The frequency behavior of the open-loop transimpedance is similar to the open-loop gain of a voltage feedback amplifier. That is, it has a large DC value and decreases at approximately 6dB per octave. Analyzing the follower with gain, as shown in Figure 1, yields the following transfer function: where G = AVCL = 1 + (RF / RG), and RIN = 1 /gM ≅ 30Ω. V V G x Z Z G x R R OUT IN OL S OL S IN F = + + ( ) ( ) ( ) Single/Dual/Quad, 400MHz, Low-Power, Current Feedback Amplifiers _______________________________________________________________________________________ 9 VIN RG RIN ZOL RF +1 +1 VOUT MAX4112 MAX4113 MAX4117 MAX4118 MAX4119 MAX4120 Figure 1. Current Feedback Amplifier PIN NAME FUNCTION MAX4112 MAX4113 SO/µMAX MAX4117 MAX4118 SO 1, 5, 8 — N.C. No Connection. Not internally connected. — 1 OUTA Amplifier A Output 2 — IN- Inverting Input — 2 INA- Amplifier A Inverting Input 3 — IN+ Noninverting Input — 3 INA+ Amplifier A Noninverting Input 4 4 VEE Negative Power Supply. Connect to -5V. — 5 INB+ Amplifier B Noninverting Input 6 — OUT Amplifier Output — 6 INB- Amplifier B Inverting Input — 7 OUTB Amplifier B Output 7 8 VCC Positive Power Supply. Connect to +5V. PIN NAME FUNCTION 1 1 OUTA Amplifier A Output 2 2 INA- Amplifier A Inverting Input 3 3 INA+ Amplifier A Noninverting Input 4 4 VCC Positive Power Supply. Connect to +5V. 5 5 INB+ Amplifier B Noninverting Input 6 6 INB- Amplifier B Inverting Input 7 7 OUTB Amplifier B Output — 8, 9 N.C. No Connection. Not internally connected. 8 10 OUTC Amplifier C Output 9 11 INC- Amplifier C Inverting Input 10 12 INC+ Amplifier C Noninverting Input 11 13 VEE Negative Power Supply. Connect to -5V. 12 14 IND+ Amplifier D Noninverting Input 13 15 IND- Amplifier D Inverting Input 14 16 OUTD Amplifier D Output SO QSOP MAX4119/MAX4120 |
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