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TLV3604 データシート(PDF) 10 Page - Texas Instruments

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部品番号. TLV3604
部品情報  TLV3604, TLV3605 800-ps High-Speed RRI Comparator with LVDS Outputs
ダウンロード  17 Pages
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
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TLV3604 Datasheet(HTML) 10 Page - Texas Instruments

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LE/HYS
OUT
IN
t>tsetup
tpHL
Figure 8-2. Short Input Pulse Properly Latched
LE/HYS
IN
t
PL
OUT
Figure 8-3. Latch Disable with Input Change
8.1.4 Adjustable Hysteresis
Because of a comparator’s high open loop gain, there is a small band of input differential voltage where the
output can toggle back and forth between a “logic high” and a “logic low”. A clean input signal with fast slopes
can pass this band quickly without problems. For slower and noisier signal slopes however, passing this band
may cause the comparator output to switch back and forth between a "logic high" and a "logic low".
This issue can be addressed by hysteresis, which is a positive feedback loop that adjusts the trip point of the
comparator depending on its current output state. The TLV3604 by default does not have any internal hysteresis.
The TLV3605 has a LE/HYST pin that can be used to increase the internal hysteresis of the part. The LE/HYST
pin on this device can be modeled as a 1.25V voltage source in series with a 40k resistor. To change the internal
hysteresis of the comparator, connect a single resistor as shown in the Figure 8-4 between the LE/HYST pin and
VEE. When this resistor is left floating, the device will have 0mV of internal hysteresis.
TLV3604
SNOSDA2A – AUGUST 2020 – REVISED AUGUST 2020
www.ti.com
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