TLC393_13 Datasheet, PDF (9/31 Pages) Texas Instruments – DUAL MICROPOWER LinCMOS VOLTAGE COMPARATOR

TLC193, TLC393
DUAL MICROPOWER LinCMOS VOLTAGE COMPARATOR
SLCS115E − DECEMBER 1986 − REVISED JULY 2003
PARAMETER MEASUREMENT INFORMATION
Propagation delay 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. Propagation delay time, low-to-high-level output, is
measured from the leading edge of the input pulse, while propagation delay time, high-to-low-level output, is
measured from the trailing edge of the input pulse. Propagation delay 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.
VDD
Input Offset Voltage
Compensation
Adjustment
Pulse
Generator
1V
−1V
10 Ω
10 Turn
1 kΩ
50 Ω
0.1 µF
DUT
TEST CIRCUIT
5.1 kΩ
1 µF
CL
(see Note A)
Overdrive
Input
100 mV
Input 100 mV
Overdrive
Low-to-High-
Level Output
90%
50%
10%
High-to-Low-
Level Output
90%
50%
10%
tr
tf
tPLH
tPHL
VOLTAGE WAVEFORMS
NOTE A: CL includes probe and jig capacitance.
Figure 3. Propagation Delay, Rise Time, and Fall Time Circuit and Voltage Waveforms
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