OPA4197IPWR datasheet(21/56 Pages) TI2

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100M

10G

Frequency (Hz)

C017

RF = -10 dBm

SUPPLY = ±18 V

CM = 0 V

OPA197, OPA2197, OPA4197

www.ti.com

SBOS737C – JANUARY 2016 – REVISED MARCH 2018

Product Folder Links: OPA197 OPA2197 OPA4197

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Feature Description (continued)

The OPAx197 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 OPA197 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, as shown in Figure 53.

7.3.2 EMI Rejection

The OPAx197 uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI from

sources such as wireless communications and densely-populated boards with a mix of analog signal chain and

digital components. EMI immunity can be improved with circuit design techniques; the OPAx197 benefits from

these design improvements. Texas Instruments has developed the ability to accurately measure and quantify the

immunity of an operational amplifier over a broad frequency spectrum extending from 10 MHz to 6 GHz.

Figure 44 shows the results of this testing on the OPA197. Table 2 shows the EMIRR IN+ values for the OPA197

at particular frequencies commonly encountered in real-world applications. Applications listed in Table 2 may be

centered on or operated near the particular frequency shown. Detailed information can also be found in the

application report EMI Rejection Ratio of Operational Amplifiers, SBOA128, available for download from

www.ti.com.

Figure 44. EMIRR Testing

Table 2. OPA197 EMIRR IN+ For Frequencies of Interest

FREQUENCY

APPLICATION OR ALLOCATION

EMIRR IN+

400 MHz

Mobile radio, mobile satellite, space operation, weather, radar, ultra-high frequency (UHF)

applications

44.1 dB

900 MHz

Global system for mobile communications (GSM) applications, radio communication, navigation,

GPS (to 1.6 GHz), GSM, aeronautical mobile, UHF applications

52.8 dB

1.8 GHz

GSM applications, mobile personal communications, broadband, satellite, L-band (1 GHz to 2 GHz)

61.0 dB

2.4 GHz

802.11b, 802.11g, 802.11n, Bluetooth®, mobile personal communications, industrial, scientific and

medical (ISM) radio band, amateur radio and satellite, S-band (2 GHz to 4 GHz)

69.5 dB

3.6 GHz

Radiolocation, aero communication and navigation, satellite, mobile, S-band

88.7 dB

5.0 GHz

802.11a, 802.11n, aero communication and navigation, mobile communication, space and satellite

operation, C-band (4 GHz to 8 GHz)

105.5 dB

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