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OPA4192IPW Datasheet(PDF) 24 Page - Texas Instruments

Part # OPA4192IPW
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
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

OPA4192IPW Datasheet(HTML) 24 Page - Texas Instruments

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±100
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±20
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100
0
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35
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Time ( s)
C040
Standard Input Diode Structure
Extends Settling Time
OPA192 Input Structure
Offers Fast Settling
0.1% Settling = ±10 mV
Input Low Pass Filter
Ron_mux
CS
CS
CD
Sn
Sn+1
D
Simplified Mux Model
RFILT
RFILT
CFILT
CFILT
Vn = +10 V
Vn+1 = ±10 V
+10 V
±10 V
Buffer Amplifier
1
2
Idiode_transient
+10 V
~±9.3 V
1
Vin+
Vin±
~0.7 V
Vout
2
±10 V
Ron_mux
OPA192
36 V
~0.7 V
VOUT
V+
V
Conventional Input Protection
Limits Differential Input Range
OPA192 Provides Full 36-V
Differential Input Range
VIN+
VIN
VOUT
V+
V
VIN+
VIN
OPA192, OPA2192, OPA4192
SBOS620E – DECEMBER 2013 – REVISED NOVEMBER 2015
www.ti.com
8.3 Feature Description
8.3.1 Input Protection Circuitry
The OPAx192 uses a unique input architecture to eliminate the need for input protection diodes but still provides
robust input protection under transient conditions. Conventional input diode protection schemes shown in
Figure 54 can be activated by fast transient step responses and can introduce signal distortion and settling time
delays because of alternate current paths, as shown in Figure 55. For low-gain circuits, these fast-ramping input
signals forward-bias back-to-back diodes, causing an increase in input current, and resulting in extended settling
time, as shown in Figure 56.
Figure 54. OPA192 Input Protection Does Not Limit Differential Input Capability
Figure 55. Back-to-Back Diodes Create Settling Issues
Figure 56. OPA192 Protection Circuit Maintains Fast-Settling Transient Response
24
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Copyright © 2013–2015, Texas Instruments Incorporated
Product Folder Links: OPA192 OPA2192 OPA4192



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