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REF3312 数据表(PDF) 12 Page - Texas Instruments

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部件名 REF3312
功能描述  0.9-V to 6.5-V, Nanopower Comparator
PDF  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

REF3312 数据表(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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Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: TLV3691



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