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TLC372CD Datasheet(PDF) 7 Page - Texas Instruments |
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TLC372CD Datasheet(HTML) 7 Page - Texas Instruments |
7 / 26 page TLC372 LinCMOS DUAL DIFFERENTIAL COMPARATORS SLCS114E − NOVEMBER 1983 − REVISED JULY 2008 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION Response time is defined as the interval between the application of an input step function and the instant when the output reaches 50% of its maximum value. Response time, low-to-high level output, is measured from the leading edge of the input pulse, while response time, high-to-low level output, is measured from the trailing edge of the input pulse. Response-time measurement at low input signal levels can be greatly affected by the input offset voltage. The offset voltage should be balanced by the adjustment at the inverting input as shown in Figure 3, so that the circuit is just at the transition point. Then a low signal, for example 105-mV or 5-mV overdrive, causes the output to change state. Low-to-High- Level Output DUT 5.1 k Ω 1 µF 0.1 µF 1 k Ω 50 Ω CL (see Note A) VDD Pulse Generator Input Offset Voltage Compensation Adjustment 10 Ω 10 Turn 1 V −1 V Overdrive Input 100 mV Overdrive Input tf tPHL 10% 50% 90% 90% 50% tr tPLH High-to-Low- Level Output TEST CIRCUIT VOLTAGE WAVEFORMS 10% 100 mV NOTE A: CL includes probe and jig capacitance. Figure 3. Response, Rise, and Fall Times Circuit and Voltage Waveforms |
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