OPA2192 datasheet(34/61 Pages) TI2

Part #	OPA2192

Description	OPAx192 36-V, Precision, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp with e-trim™

PDF	61 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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34 / 61 page

1 k

10 µF

RISO

37.4

VREF

2.5 V

RFx

10 k

39 nF

V+

OPA192

VOUT

VCC

OPA192, OPA2192, OPA4192

SBOS620E – DECEMBER 2013 – REVISED NOVEMBER 2015

www.ti.com

9.2.3 Precision Reference Buffer

The OPAx192 features high output current drive capability and low input offset voltage, making the device an

excellent reference buffer to provide an accurate buffered output with ample drive current for transients. For the

10-µF ceramic capacitor shown in Figure 69, RISO, a 37.4-Ω isolation resistor, provides separation of two

feedback paths for optimal stability. Feedback path number one is through RF and is directly at the output, VOUT.

Feedback path number two is through RFx and CF and is connected at the output of the op amp. The optimized

stability components shown for the 10-µF load give a closed-loop signal bandwidth at VOUT of 4 kHz and still

provides a loop gain phase margin of 89°. Any other load capacitances require recalculation of the stability

components: RF, RFx , CF , and RISO.

Figure 69. Precision Reference Buffer

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Product Folder Links: OPA192 OPA2192 OPA4192

OPA2192 Datasheet(PDF) 34 Page - Texas Instruments