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TLV4021 bảng dữ liệu(PDF) 17 Page - Texas Instruments

tên linh kiện TLV4021
Giải thích chi tiết về linh kiện  TLV40x1 Small-Size, Low-Power Comparator with Precision Reference
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nhà sản xuất  TI [Texas Instruments]
Trang chủ  http://www.ti.com
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TLV4021 bảng dữ liệu(HTML) 17 Page - Texas Instruments

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TLV4021, TLV4031, TLV4041, TLV4051
www.ti.com
SNVSB04B – MARCH 2019 – REVISED JUNE 2020
Product Folder Links: TLV4021 TLV4031 TLV4041 TLV4051
Submit Documentation Feedback
Copyright © 2019–2020, Texas Instruments Incorporated
7.3 Feature Description
The TLV40x1 is a family of 4-pin, precision, low-power comparators with precision switching thresholds. The
TLV40x1 comparators feature a rail-to-rail input stage with factory programmed switching thresholds for both
rising and falling input waveforms. The comparator family also supports open-drain and push-pull output
configurations as well as non-inverting and inverting inputs.
7.4 Device Functional Modes
7.4.1 Power ON Reset (POR)
The TLV40x1 comparators have a Power-on-Reset (POR) circuit which provides system designers a known
start-up condition for the output of the comparators. When the power supply (VS) is ramping up or ramping down,
the POR circuit will be active when VS is below VPOR. For the TLV4021 and TLV4031, the POR circuit will force
the output to High-Z, and for the TLV4041 and TLV4051, the POR circuit will hold the output low at (V-). When
VS is greater than, or equal to, the minimum recommended operating voltage, the comparator output reflects the
state of the input (IN).
The following pictures represent how the TLV40x1 outputs respond for VS rising and falling. For the comparators
with open-drain outputs (TLV4021/4031), IN is connected to (V-) to highlight the transition from POR circuit
control to standard comparator operation where the output reflects the input condition. Note how the output goes
low when VS reaches 1.45V. Likewise, for the comparators with push-pull outputs (TLV4041/4051), the input is
connected to (V+). Note how the output goes high when VS reaches 1.45V.
Figure 33. TLV4021/4031 Output for VS Rising
Figure 34. TLV4021/4031 Output for VS Falling
Figure 35. TLV4041/4051 Output for VS Rising
Figure 36. TLV4041/4051 Output for VS Falling
7.4.2 Input (IN)
The TLV40x1 comparators have two inputs: one external input (IN) and one internal input that is connected to
the integrated voltage reference. The comparator rising threshold is trimmed to the reference voltage (VIT+) while
the falling threshold is trimmed to (VIT-). Since the rising and falling thresholds are both trimmed and warranted in
the Electrical Characteristics Table, the TLV40x1 is equally suited for undervoltage and overvoltage detection.
The difference between (VIT+) and (VIT-) is referred to as the comparator hysteresis and is 20 mV for TLV40x1Ry
and 54 mV for TLV4021S5. The integrated hysteresis makes the TLV40x1 less sensitive to supply-rail noise and
provides stable operation in noisy environments without having to add external positive feedback to create
hysteresis.


Số phần tương tự - TLV4021_V03

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1Mb / 33P
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TLV4021 TI-TLV4021_V04 Datasheet
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[Old version datasheet]   TLV40x1 Small-Size, Low-Power Comparator with Precision Reference
DECEMBER 2021
TLV4021 TI-TLV4021_V05 Datasheet
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[Old version datasheet]   TLV40x1 Small-Size, Low-Power Comparator with Precision Reference
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Mô tả tương tự - TLV4021_V03

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
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Texas Instruments
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1Mb / 36P
[Old version datasheet]   TLV40x1 Small-Size, Low-Power Comparator with Precision Reference
DECEMBER 2021
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