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LM2901QPWRQ1 데이터시트(PDF) 7 Page - Texas Instruments |
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LM2901QPWRQ1 데이터시트(HTML) 7 Page - Texas Instruments |
7 / 20 page 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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