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MC3303DR2 데이터시트(PDF) 5 Page - ON Semiconductor |
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MC3303DR2 데이터시트(HTML) 5 Page - ON Semiconductor |
5 / 9 page MC3403, MC3303 http://onsemi.com 5 CIRCUIT DESCRIPTION Figure 2. Inverter Pulse Response 20 ms/DIV The MC3403/3303 is made using four internally compensated, two−stage operational amplifiers. The first stage of each consists of differential input device Q24 and Q22 with input buffer transistors Q25 and Q21 and the differential to single ended converter Q3 and Q4. The first stage performs not only the first stage gain function but also performs the level shifting and Transconductance reduction functions. By reducing the Transconductance, a smaller compensation capacitor (only 5.0 pF) can be employed, thus saving chip area. The Transconductance reduction is accomplished by splitting the collectors of Q24 and Q22. Another feature of this input stage is that the input common mode range can include the negative supply or ground, in single supply operation, without saturating either the input devices or the differential to single−ended converter. The second stage consists of a standard current source load amplifier stage. The output stage is unique because it allows the output to swing to ground in single supply operation and yet does not exhibit any crossover distortion in split supply operation. This is possible because Class AB operation is utilized. Each amplifier is biased from an internal voltage regulator which has a low temperature coefficient, thus giving each amplifier good temperature characteristics as well as excellent power supply rejection. Figure 3. Sine Wave Response Figure 4. Open Loop Frequency Response 1.0 10 100 1.0 k 10 k 100 k 1.0 M f, FREQUENCY (Hz) −20 0 20 40 60 80 100 120 50 ms/DIV AV = 100 *Note Class A B output stage produces distortion less sinewave. VCC = 15 V VEE = −15 V TA = 25°C Figure 5. Power Bandwidth Figure 6. Output Swing versus Supply Voltage f, FREQUENCY (Hz) 1.0 k 10 k 100 k 1.0 M −5.0 0 5.0 10 15 20 25 30 TA = 25°C +15 V −15 V 10 k VO − + 0 2.0 4.0 6.0 8.0 10 12 14 16 18 20 VCC AND (VEE), POWER SUPPLY VOLTAGES (V) 0 20 30 10 TA = 25°C |
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