Datasheet

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EMIRRIN+(dB)
10M 10G
Frequency(Hz)
100M 1G
OPA4188
www.ti.com SBOS641B –JUNE 2012–REVISED MARCH 2013
APPLICATION INFORMATION
The OPA4188 operational amplifier combines precision offset and drift with excellent overall performance,
making it 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 OPA4188 is specified for operation from 4 V to 36 V (±2 V to ±18 V). Many of the 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.
EMI REJECTION
The OPA4188 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 OPA4188
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 OPA4188. 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 39. EMIRR Testing
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