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LM2901QDRQ1 Folha de dados(PDF) 7 Page - Texas Instruments

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Nome de Peças LM2901QDRQ1
Descrição Electrónicos  LM2901x-Q1 Quadruple Differential Comparator
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

LM2901QDRQ1 Folha de dados(HTML) 7 Page - Texas Instruments

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GND
IN–
IN+
10 µA
OUT
VCC
60 µA
80-µA
Current
Regulator
10 µA
80-µA
Copyright © 2016, Texas Instruments Incorporated
7
LM2901-Q1, LM2901V-Q1, LM2901AV-Q1
www.ti.com
SLCS142E – DECEMBER 2003 – REVISED MAY 2016
Product Folder Links: LM2901-Q1 LM2901V-Q1 LM2901AV-Q1
Submit Documentation Feedback
Copyright © 2003–2016, Texas Instruments Incorporated
7 Detailed Description
7.1 Overview
The LM2901x-Q1 family of devices is a quad comparator with the ability to operate up to an absolute maximum
of 36 V on the supply pin. This standard device has proven ubiquity and versatility across a wide range of
applications because of the very wide supply voltage range (2 V to 30 V or 32 V), low IQ, and fast response of
the device.
This device is AEC-Q100 qualified and can operate over a wide temperature range (–40°C to 125°C).
The open-collector output allows the user to configure the logic-high voltage of the output (VOH) independent of
VCC and can be used with multiple comparators in wired AND functionality.
7.2 Functional Block Diagram
7.3 Feature Description
The LM2901x-Q1 family of devices consists of a PNP Darlington pair input, allowing the device to operate with
very high gain and fast response with minimal input bias current. The input Darlington pair creates a limit on the
input common-mode voltage ability, allowing the LM2901x-Q1 family of devices to accurately function from
ground to VCC – 2 V for the lower voltage input. The higher voltage input may go up to the maximum VCC. This
ability enables a wide input range even when using modern-day supplies of 3.3 V and 5 V.
The output consists of an open collector bipolar transistor. The transistor sinks current when the positive input
voltage is higher than the negative input voltage and the offset voltage. The VOL is resistive and scales with the
output current. See Figure 3 in Typical Characteristics for the VOL values with respect to the output current.
The special pinout of this device separates input pins from the output pins to reduce parasitic coupling between
input and output.
7.4 Device Functional Modes
7.4.1 Voltage Comparison
The LM2901x-Q1 family of devices operates solely as a voltage comparator, comparing the differential voltage
between the positive and negative pins and outputs a logic low or high impedance (logic high with pullup) based
on the input differential polarity.


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