OPA2140AIDR datasheet(22/48 Pages) TI

22 / 48 page

Table 7-1 lists the EMIRR IN+ values for the OPA2140 at particular frequencies commonly encountered in real-

world applications. Applications listed in Table 7-1 may be centered on or operated near the particular frequency

shown. This information may be of special interest to designers working with these types of applications, or

working in other fields likely to encounter RF interference from broad sources, such as the industrial, scientific,

and medical (ISM) radio band.

Table 7-1. OPA2140 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

53.1 dB

900 MHz

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

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

72.2 dB

1.8 GHz

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

80.7 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)

86.8 dB

3.6 GHz

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

91.7 dB

5 GHz

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

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

96.6 dB

7.3.10 EMIRR +IN Test Configuration

Figure 7-7 shows the circuit configuration for testing the EMIRR IN+. An RF source is connected to the

op amp noninverting input terminal using a transmission line. The op amp is configured in a unity gain

buffer topology with the output connected to a low-pass filter (LPF) and a digital multimeter (DMM). A large

impedance mismatch at the op amp input causes a voltage reflection; however, this effect is characterized and

accounted for when determining the EMIRR IN+. The resulting DC offset voltage is sampled and measured

by the multimeter. The LPF isolates the multimeter from residual RF signals that may interfere with multimeter

accuracy.

Low-Pass Filter

Digital Multimeter

Ambient temperature: 25Û&

Sample /

Averaging

+VS

-VS

Not shown: 0.1 µF and 10 µF

supply decoupling

RF source

DC Bias: 0 V

Modulation: None (CW)

Frequency Sweep: 201 pt. Log

Figure 7-7. EMIRR +IN Test Configuration

7.4 Device Functional Modes

The OPAx140 has a single functional mode and is operational when the power-supply voltage is greater than

4.5 V (±2.25 V). The maximum power supply voltage for the OPAx140 is 36 V (±18 V).

OPA140, OPA2140, OPA4140

SBOS498E – JULY 2010 – REVISED JULY 2021

www.ti.com

Submit Document Feedback

Product Folder Links: OPA140 OPA2140 OPA4140

OPA2140AIDR Datasheet(PDF) 22 Page - Texas Instruments

OPA2140AIDR Datasheet(HTML) 22 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

Datasheet Download

Link URL