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LM2901QPWRG4Q1 датащи(PDF) 8 Page - Texas Instruments

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номер детали LM2901QPWRG4Q1
подробное описание детали  LM2901x-Q1 Quadruple Differential Comparator
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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LM2901QPWRG4Q1 датащи(HTML) 8 Page - Texas Instruments

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V
SUP
V
xIN+
V
REF
+
C
L
R
PULLUP
V
LOGIC
½ LM2901x-Q1
V
xIN+
V
xIN–
C
L
R
PULLUP
½ LM2901x-Q1
V
SUP
V
LOGIC
Copyright © 2016, Texas Instruments Incorporated
8
LM2901-Q1, LM2901V-Q1, LM2901AV-Q1
SLCS142E – DECEMBER 2003 – REVISED MAY 2016
www.ti.com
Product Folder Links: LM2901-Q1 LM2901V-Q1 LM2901AV-Q1
Submit Documentation Feedback
Copyright © 2003–2016, Texas Instruments Incorporated
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The LM2901x-Q1 family of devices is typically used to compare a single signal to a reference or two signals
against each other. Many users take advantage of the open-drain output to drive the comparison logic output to a
logic voltage level to an MCU or logic device. The wide supply range and high voltage capability makes the
LM2901x-Q1 family of devices optimal for level shifting to a higher or lower voltage.
8.2 Typical Application
Figure 4. Single-Ended and Differential Comparator Configurations
8.2.1 Design Requirements
For this design example, use the parameters listed in Table 1 as the input parameters.
Table 1. Design Parameters
PARAMETER
EXAMPLE VALUE
Input voltage range
0 V to VSUP – 1.5 V
Supply voltage
2 V to 36 V
Logic supply voltage
2 V to 36 V
Output current (RPULLUP)
1 µA to 20 mA
Input overdrive voltage
100 mV
Reference voltage
2.5 V
Load capacitance (CL)
15 pF
8.2.2 Detailed Design Procedure
8.2.2.1 Input Voltage Range
When selecting the input voltage range, the input common-mode voltage range (VICR) must be considered. If
temperature operation is above or below 25°C the VICR can range from 0 V to VCC – 2 V. The VICR range limits
the input voltage range to as high as VCC – 2 V and as low as 0 V. Operation outside of this range can yield
incorrect comparisons.
The following lists some input voltage scenarios and the resulting outcomes:
When both IN– and IN+ are both within the common-mode range:
If IN– is higher than IN+ and the offset voltage, then the output is low and the output transistor is sinking
current.


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