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MC3503P Datasheet(PDF) 5 Page - STMicroelectronics |
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MC3503P Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 11 page ![]() The MC3403 is made using four internally compen- sated, two-stage operational amplifiers. The first stage of each consists of differential input devices 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 shift- ing and transconductance reduction functions. By reducing the transconductance a smaller compen- sation capacitor (only 8pF) 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 of ground, in single supply operation, without satura- tion either the input devices or the differential to sin- gle-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 opera- tions. 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 charac- teristics as well as excellent power supply rejection. CIRCUIT DESCRIPTION 20 µs/div. TYPICAL PERFORMANCE CURVES AV = 100 1/4 MC3403 VO VCC VCC R1 10k Ω VO = VCC 1 2 VO R1 R1 + R2 VCC = R2 10k Ω APPLICATION INFORMATION VOLTAGE REFERENCE 50k Ω 5k Ω 10k Ω 1/4 MC3403 VO VCC V(ref) R C C R V(ref) = 1 2 VCC f O = 1 2 π RC For f O = 1kHz R = 16k Ω C = 0.01 µF WIEN BRIDGE OSCILLATOR MC3303 - MC3403 - MC3503 5/11 |
Similar Part No. - MC3503P |
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Similar Description - MC3503P |
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