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REF3325 bảng dữ liệu(PDF) 12 Page - Texas Instruments

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tên linh kiện REF3325
Giải thích chi tiết về linh kiện  0.9-V to 6.5-V, Nanopower Comparator
PDF  24 Pages
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nhà sản xuất  TI1 [Texas Instruments]
Trang chủ  http://www.ti.com
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REF3325 bảng dữ liệu(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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