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REF3312 Fiches technique(PDF) 12 Page - Texas Instruments

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No de pièce REF3312
Description  0.9-V to 6.5-V, Nanopower Comparator
PDF  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

REF3312 Fiches technique(HTML) 12 Page - Texas Instruments

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+V
+5 V
CC
R
LOAD
V
O
R2
1 MW
V
REF
+2.5 V
V
A
5 V
0 V
1.675 V
3.325 V
V
IN2
V
IN
V
O High
+V
CC
V = V
A
REF
R2
R1
330 kW
V
IN
R1
V
O Low
V
IN1
V = V
A
REF
R1
R2
V
O
V
IN1
V
IN2
DV = V
IN
CC
´
R1
R2
V
=
IN2
V
REF
CC
(R1 + R2)
V
R1
-
´
R2
V
= R1
IN1
´
VREF
R2
+ VREF
TLV3691
SBOS694 – DECEMBER 2013
www.ti.com
Noninverting Comparator with Hysteresis
A noninverting comparator with hysteresis requires a two-resistor network, as shown in Figure 30, and a voltage
reference (VREF) at the inverting input. When VIN is low, the output is also low. For the output to switch from low
to high, VIN must rise to VIN1. VIN1 is calculated by Equation 4:
(4)
When VIN is high, the output is also high. In order for the comparator to switch back to a low state, VIN must drop
to VIN2 such that VA is equal to VREF. VIN2 can be calculated by Equation 5:
(5)
The hysteresis of this circuit is the difference between VIN1 and VIN2, as defined by Equation 6.
(6)
Figure 30. TLV3691 in a Noninverting Configuration with Hysteresis
12
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Product Folder Links: TLV3691



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