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OPA2191 bảng dữ liệu(PDF) 22 Page - Texas Instruments

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tên linh kiện OPA2191
Giải thích chi tiết về linh kiện  OPAx191 36-V, Low-Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp
PDF  59 Pages
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Trang chủ  http://www.ti.com
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OPA2191 bảng dữ liệu(HTML) 22 Page - Texas Instruments

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8 Detailed Description
8.1 Overview
The OPAx191 family of e-trim operational amplifiers use a method of package-level trim for offset and offset
temperature drift implemented during the final steps of manufacturing after the plastic molding process. This
method minimizes the influence of inherent input transistor mismatch, as well as errors induced during package
molding. The trim communication occurs on the output pin of the standard pinout, and after the trim points
are set, further communication to the trim structure is permanently disabled. Section 8.2 shows the simplified
diagram of the OPAx191.
Unlike previous e-trim operational amplifiers, the OPAx191 uses a patented two-temperature trim architecture to
achieve a very low offset voltage and low voltage offset drift over the full specified temperature range. This level
of precision performance at wide supply voltages makes these amplifiers useful for high-impedance industrial
sensors, filters, and high-voltage data acquisition.
8.2 Functional Block Diagram
±
+
±
+
36-V
Differential
Front End
Slew
Boost
e-WULPŒ
Operational Amplifier
Package Level Trim
IN+
IN±
VOUT
OPAx191
+
±
NCH Input
Stage
PCH Input
Stage
Output
Stage
High
Capacitive Load
Compensation
OPA191, OPA2191, OPA4191
SBOS701D – DECEMBER 2015 – REVISED AUGUST 2021
www.ti.com
22
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Copyright © 2021 Texas Instruments Incorporated
Product Folder Links: OPA191 OPA2191 OPA4191



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