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LM339BIDR Arkusz danych(PDF) 22 Page - Texas Instruments

Numer części LM339BIDR
Szczegółowy opis  LM339B, LM2901B, LM339, LM239, LM139, LM2901 Quad Differential Comparators
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8 Detailed Description
8.1 Overview
The LMx39 and LM2901x are quad comparators 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.
This is due to very wide supply voltages range (2 V up to 32 V), low Iq, and fast response of the device.
The open-drain output allows the user to configure the output logic low voltage (VOL) and allows the comparator
to be used in AND functionality.
8.2 Functional Block Diagram
80- A
µ
Current Regulator
80 µA
60 µA
10 µA
VCC
10 µA
OUT
GND
IN+
IN−
Epi-FET
Diodes
Resistors
Transistors
COMPONENT COUNT
1
2
2
30
Figure 8-1. Schematic (Each Comparator)
8.3 Feature Description
The comparator 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 capability, allowing the comparator to accurately function from ground to (VCC – 1.5 V) differential
input. Allow for (VCC – 2 V) at cold temperature.
The output consists of an open-collector NPN (pulldown or low-side) transistor. The output NPN sinks current
when the negative input voltage is higher than the positive input voltage and the offset voltage. The VOL is
resistive and scales with the output current. See the Section 7 section for VOL values with respect to the output
current.
8.4 Device Functional Modes
8.4.1 Voltage Comparison
The comparator operates solely as a voltage comparator, comparing the differential voltage between the positive
and negative pins and outputting a logic low or high impedance (logic high with pullup) based on the input
differential polarity.
LM139, LM239, LM339, LM339B, LM139A, LM239A
LM339A, LM2901B, LM2901, LM2901AV, LM2901V
SLCS006V – OCTOBER 1979 – REVISED DECEMBER 2022
www.ti.com
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Product Folder Links: LM139 LM239 LM339 LM339B LM139A LM239A LM339A LM2901B LM2901 LM2901AV
LM2901V


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