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TL331IDBVRG4 Datasheet(PDF) 7 Page - Texas Instruments |
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TL331IDBVRG4 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 18 page 80- A m Current Regulator 80 mA 60 mA 10 mA VCC 10 mA OUT GND IN+ IN− Epi-FET Diodes Resistors Transistors COMPONENT COUNT 1 2 1 20 TL331 www.ti.com SLVS238G – AUGUST 1999 – REVISED JANUARY 2015 8 Detailed Description 8.1 Overview The TL331 is a single comparator with the ability to operate up to 36 V on the supply pin. This standard device has proven ubiquity and versatility across a wide range of applications. This is due to it's very wide supply voltages range (2 V to 36 V), low Iq and fast response. The open-drain output allows the user to configure the output's logic low voltage (VOL) and can be utilized to enable the comparator to be used in AND functionality. 8.2 Functional Block Diagram Current values shown are nominal. 8.3 Feature Description TL331 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 TL331 to accurately function from ground to VCC – 1.5 V differential input. This is enables much head room for modern day supplies of 3.3 V and 5.0 V. The output consists of an open drain NPN (pull-down or low side) transistor. The output NPN will sink current when the positive input voltage is higher than the negative input voltage and the offset voltage. The VOL is resistive and will scale with the output current. Please see Figure 3 for VOL values with respect to the output current. 8.4 Device Functional Modes 8.4.1 Voltage Comparison The TL331 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 pull-up) based on the input differential polarity. Copyright © 1999–2015, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: TL331 |
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