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MAX4493AUK-T Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX4493AUK-T Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 15 page SC70, Low-Power, General-Purpose, Dual-Supply, Rail-to-Rail Op Amps _______________________________________________________________________________________ 7 Pin Description PIN MAX4493 MAX4494 MAX4495 NAME FUNCTION — 1 1 OUTA Channel A Output — 2 2 INA- Channel A Inverting Input — 3 3 INA+ Channel A Noninverting Input — 7 7 OUTB Channel B Output — 6 6 INB- Channel B Inverting Input — 5 5 INB+ Channel B Noninverting Input — — 8 OUTC Channel C Output — — 9 INC- Channel C Inverting Input — — 10 INC+ Channel C Noninverting Input — — 14 OUTD Channel D Output — — 13 IND- Channel D Inverting Input — — 12 IND+ Channel D Noninverting Input 4 — —- OUT Output 1 — — IN+ Noninverting Input 3 — — IN- Inverting Input 58 4 VCC Positive Supply 24 11 VEE Negative Supply Applications Information Rail-to-Rail Output Stage The MAX4493/MAX4494/MAX4495 output stage can drive up to 1kΩ and still swing within 200mV of the rails. Capacitive-Load Stability Driving large capacitive loads can cause instability in many op amps. The MAX4493/MAX4494/MAX4495 are stable with capacitive loads up to 300pF. The Capacitive-Load Stability graph in the Typical Operating Characteristics gives the stable operation region for capacitive versus resistive load. Stability with higher capacitive loads can be improved by adding an isolation resistor in series with the op-amp output, as shown in Figure 1. This resistor improves the circuit’s phase margin by isolating the load capacitor from the amplifier’s output. As seen in the Typical Operating Characteristics, driving capacitive loads with an isola- tion resistor exhibits some overshoot, but no oscillation. Full-Power Bandwidth The FPBW is given by: FPBW Hz SR VOUTp p () (max) = [] − π RISO INPUT OUTPUT CL MAX4493 Figure 1. Capacitive Load Driving Circuit |
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