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3422G-D08-T Datasheet(PDF) 5 Page - Unisonic Technologies |
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3422G-D08-T Datasheet(HTML) 5 Page - Unisonic Technologies |
5 / 6 page 3422 LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 5 of 6 www.unisonic.com.tw QW-R105-029,Ba APPLICATIONS INFORMATION UTC 3422 IN COMPARATOR APPLICATION The UTC 3422 is a dual bipolar operational amplifier offering a single supply operation from 3V ~ 36V with very good performances: medium speed (25MHz), unity gain stability and low noise. Most of operational amplifiers are not suited for comparator use because of low transition speed, output signal incompatible with standard logics level and mainly, phase inversion. The phase inversion occures when a strong differential signal is applied to the device inputs. The output level is then inverted and shows a wrong logic state. The UTC 3422 does not present this problematic behaviour. Figure 1 shows basic comparator application. Figure 2 shows the curves of the device response in standard comparator configuration without external components. Transition speed : Typical transition speed under a single 5V supply voltage is about 2μs from 50mV overdrive. VOH(MIN). is 3.7V and VOL(MAX). is 0.2V (2kΩ load) making it compatible with standard logic families. Figure 3 shows output signal transition for a 50mV input signal overdrive respectively of 3μs. Figure 4 shows output signal transition for a 250mV input signal overdrive respectively of 1μs. Figure.1 Basic Comparator Application Figure.2 Operating Conditions 0 0.5 Time (0.5μs/div) 1.0 1.5 2.0 VREF Vo VIN+ 4 2 0 3μs 6 0 0.5 Time (0.5μs/div) 1.0 1.5 2.0 VREF Vo VIN+ 4 2 0 1μs 6 Figure.3 Transition Speed @ 50mV Overdrive Figure.4 Transition Speed @ 250mV Overdrive |
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