OPA188_15 Datasheet, PDF (16/34 Pages) Texas Instruments – Precision, Low-Noise, Rail-to-Rail Output, 36-V, Zero-Drift Operational Amplifiers

OPA188
SBOS642A – MARCH 2013 – REVISED MARCH 2013
APPLICATION INFORMATION
www.ti.com
The OPA188 operational amplifier combines precision offset and drift with excellent overall performance, making
the device ideal for many precision applications. The precision offset drift of only 0.085 µV per degree Celsius
provides stability over the entire temperature range. In addition, the device offers excellent overall performance
with high CMRR, PSRR, and A_OL. As with all amplifiers, applications with noisy or high-impedance power
supplies require decoupling capacitors close to the device pins. In most cases, 0.1-µF capacitors are adequate.
OPERATING CHARACTERISTICS
The OPA188 is specified for operation from 4 V to 36 V (±2 V to ±18 V). Many specifications apply from –40°C to
+125°C. Parameters that can exhibit significant variance with regard to operating voltage or temperature are
presented in the Typical Characteristics section.
EMI REJECTION
The OPA188 uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI interference
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 OPA188 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 39 shows the results of this testing on the OPA188. Table 3 shows the EMIRR IN+ values for the OPA188
at particular frequencies commonly encountered in real-world applications. Applications listed in Table 3 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.
160
140
120
100
80
60
40
20
0
10M
100M
1G
10G
Frequency (Hz)
Figure 39. EMIRR Testing
FREQUENCY
400 MHz
900 MHz
1.8 GHz
2.4 GHz
3.6 GHz
5.0 GHz
Table 3. OPA188 EMIRR IN+ for Frequencies of Interest
APPLICATION/ALLOCATION
Mobile radio, mobile satellite, space operation, weather, radar, ultra-high frequency
(UHF) applications
Global system for mobile communications (GSM) applications, radio
communication, navigation, GPS (to 1.6 GHz), GSM, aeronautical mobile, UHF
applications
GSM applications, mobile personal communications, broadband, satellite, L-band
(1 GHz to 2 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)
Radiolocation, aero communication and navigation, satellite, mobile, S-band
802.11a, 802.11n, aero communication and navigation, mobile communication,
space and satellite operation, C-band (4 GHz to 8 GHz)
EMIRR IN+
62.2 dB
74.7 dB
100.7 dB
102.4 dB
104.8 dB
100.3 dB
16
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