OPA2188_15 Datasheet, PDF (15/28 Pages) Texas Instruments – 0.03-μV/°C Drift, Low-Noise, Rail-to-Rail Output, 36-V, Zero-Drift OPERATIONAL AMPLIFIERS

OPA2188
www.ti.com
SBOS525B – AUGUST 2011 – REVISED SEPTEMBER 2012
APPLICATION INFORMATION
The OPA2188 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 OPA2188 is specified for operation from 4 V to 36 V (±2 V to ±18 V). Many of the specifications apply from
–40°C to +105°C. Parameters that can exhibit significant variance with regard to operating voltage or
temperature are presented in the Typical Characteristics.
EMI REJECTION
The OPA2188 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 OPAx188
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 OPA2188. Detailed information can also be found in the
Application Report EMI Rejection Ratio of Operational Amplifiers (SBOA128), available for download from the TI
website.
160
140
120
100
80
60
40
20
0
10M
100M
1G
10G
Frequency (Hz)
Figure 39. EMIRR Testing
Copyright © 2011–2012, Texas Instruments Incorporated
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