OPA192_15 Datasheet, PDF (23/52 Pages) Texas Instruments – OPAx192 36-V, Precision, Rail-to-Rail Input/Output, Low Offset Voltage,Low Input Bias Current Op Amp with e-trim™

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8 Detailed Description
OPA192, OPA2192, OPA4192
SBOS620D – DECEMBER 2013 – REVISED SEPTEMBER 2015
8.1 Overview
The OPAx192 family of operational amplifiers use e-trim, 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. The Functional Block Diagram section
shows the simplified diagram of the OPA192 with e-trim.
Unlike previous e-trim op amps, the OPAx192 uses a patented two-temperature trim architecture to achieve a
very low offset voltage of 25 µV (max) and low voltage offset drift of 0.5 µV/°C (max) 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

NCH Input
Stage

OPAx192
IN+
36-V
Differential
Front End
IN
Slew
Boost

PCH Input
Stage
J
High
Capacitive Load
Compensation

Output
Stage

VOUT
e-trim
Package Level Trim
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