LMH7324_14 Datasheet, PDF (11/30 Pages) Texas Instruments – Quad 700 ps High Speed Comparator with RSPECL Outputs

LMH7324
www.ti.com
Symbol
t_PDH resp t_PDL
Text
Propagation Delay
t_PDLresp t_PDH
t_PDLH
t_PDHL
t_PD
t_PDHd resp t_PDLd
t_OD-disp
t_SR-disp
t_CM-disp
Δt_PDLH resp
Δt_PDHL
Δt_PD
Δt_PDd
t_r/t_rd
t_f/t_fd
Input Overdrive Dispersion
Input Slew Rate Dispersion
Input Common Mode Dispersion
Q to Q Time Skew
Average Q to Q Time Skew
Average Diff. Time Skew
Output Rise Time (20% - 80%)
Output Fall Time (20% - 80%)
SNOSAZ2F – SEPTEMBER 2007 – REVISED JULY 2010
Description
Delay time between the moment the input signal crosses the switching level L to
H and the moment the output signal crosses 50% of the rising edge of Q output
(t_PDH), or delay time between the moment the input signal crosses the switching
level H to L and the moment the output signal crosses 50% of the falling edge of
Q output (t_PDL).
Delay time between the moment the input signal crosses the switching level L to
H and the moment the output signal crosses 50% of the falling edge of Q output
(t_PDL), or delay time between the moment the input signal crosses the switching
level H to L and the moment the output signal crosses 50% of the rising edge of
Q output (t_PDH).
Average of t_PDH and t_PDL
Average of t_PDL and t_PDH
Average of t_PDLH and t_PDHL
Delay time between the moment the input signal crosses the switching level L to
H and the zero crossing of the rising edge of the differential output signal (t_PDHd),
or delay time between the moment the input signal crosses the switching level H
to L and the zero crossing of the falling edge of the differential output signal
(t_PDLd).
Change in t_PD for different overdrive voltages at the input pins.
Change in t_PD for different slew rates at the input pins.
Change in t_PD for different common mode voltages at the input pins.
Time skew between 50% levels of the rising edge of Q output and the falling
edge of Q output (Δt_PDLH), or time skew between 50% levels of falling edge of Q
output and rising edge of Q output (Δt_PDHL).
Average of t_PDLH and t_PDHL for L to H and H to L transients.
Average of t_PDHd and t_PDLd for L to H and H to L transients.
Time needed for the (single ended or differential) output voltage to change from
20% of its nominal value to 80%.
Time needed for the (single ended or differential) output voltage to change from
80% of its nominal value to 20%.
Differential
Input Signal
Output Q
Output Q
Differential
Output Signal
PW
't_PDLH
t_PDH
t_PDL
t_PDHd
V_overdrive
't_PDHL
t_PDL
80% or 90%
10% or 20%
t_PDH
t_f
t_r
t_rd
80% or 90%
t_{PDLd 10% or 20%}
t_fd
Figure 15. Timing Definitions
0
t_PDLH = (t_PDH + t_PDL)/ 2
t_PDHL = (t_PDL + t_PDH)/ 2
t_PD = (t_PDLH + t_PDHL)/ 2
V_O ^{'tPDLH = | tPDH - tPDL |}
't_PDHL = | t_PDL - t_PDH |
V_O ^{'tPD = 'tPDLH + 'tPDHL)/ 2}
't_PDQ = | t_PDH - t_PDL |
't_PDQ = | t_PDL - t_PDH |
0
t_PDd = (t_PDHd + t_PDLd)/ 2
't_PDd = | t_PDHd - t_PDLd |
Copyright © 2007–2010, Texas Instruments Incorporated
Product Folder Links: LMH7324
Submit Documentation Feedback
11