OPA191_V01 datasheet(23/53 Pages) TI1

Teilenummer	OPA191

Bauteilbeschribung	OPAx191 36-V, Low Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp

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Input Low-Pass Filter

Ron_mux

CS

CD

Sn

Sn+1

D

Simplified Mux Model

RFILT

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

OPAx191

36 V

~0.7 V

VOUT

V+

V

Conventional Input Protection

Limits Differential Input Range

OPAx191 Provides Full 36-

V Differential Input Range

VIN+

VIN

VOUT

V+

V

VIN+

VIN

23

OPA191, OPA2191, OPA4191

www.ti.com

SBOS701B – DECEMEBER 2015 – REVISED JULY 2019

Product Folder Links: OPA191 OPA2191 OPA4191

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8.3 Feature Description

8.3.1 Input Protection Circuitry

The OPAx191 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 51 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 52. For low-gain circuits, these fast-ramping input

signals forward-bias back-to-back diodes that cause an increase in input current, resulting in extended settling

time.

Figure 51. OPA191 Input Protection Does Not Limit Differential Input Capability

Figure 52. Back-to-Back Diodes Create Settling Issues

The OPAx191 family of operational amplifiers provides a true high-impedance differential input capability for high-

voltage applications. This patented input protection architecture does not introduce additional signal distortion or

delayed settling time, making the device an optimal op amp for multichannel, high-switched, input applications.

The OPA191 can tolerate a maximum differential swing (voltage between inverting and noninverting pins of the

op amp) of up to 36 V, making the device suitable for use as a comparator or in applications with fast-ramping

input signals such as multiplexed data-acquisition systems (see Figure 64).

Ähnliche Beschreibung - OPA191_V01

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Texas Instruments	OPA191	3Mb / 57P	[Old version datasheet] OPAx191 36-V, Low-Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp
	OPA191	4Mb / 59P	[Old version datasheet] OPAx191 36-V, Low-Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp REVISED AUGUST 2021
	OPA191	3Mb / 56P	[Old version datasheet] OPAx191 36-V, Low Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp
	OPA191_0017	3Mb / 51P	[Old version datasheet] 36-V, Low Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp
	OPA191_00017	3Mb / 52P	[Old version datasheet] 36-V, Low Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp
	OPA191_017	3Mb / 51P	[Old version datasheet] 36-V, Low Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp
	OPA191	3Mb / 49P	[Old version datasheet] Low Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp
	OPA192-Q1	2Mb / 42P	[Old version datasheet] 36-V, Precision, Rail-to-Rail Input/Output, Low-Offset Voltage, Low-Input Bias Current Op Amp With e-trim
	OPA192	2Mb / 52P	[Old version datasheet] OPAx192 36-V, Precision, Rail-to-Rail Input/Output, Low Offset Voltage,Low Input Bias Current Op Amp with e-trim?
	OPA2192	3Mb / 51P	[Old version datasheet] 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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