OPA196 Datasheet, PDF (27/47 Pages) Texas Instruments – 36-V, Low-Power, Low Offset Voltage, Rail-to-Rail Operational Amplifier

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8 Application and Implementation
OPA196, OPA2196, OPA4196
SBOS869 – JULY 2017
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The OPAx196 family offers outstanding dc precision and ac performance. These devices operate up to 36-V
supply rails and offer true rail-to-rail input/output, ultralow offset voltage and offset voltage drift, as well as
2-MHz bandwidth and high capacitive load drive. These features make the OPAx196 a robust, high-performance
operational amplifier for high-voltage industrial applications.
8.2 Typical Applications
8.2.1 Low-side Current Measurement
Figure 46 shows the OPA196 configured in a low-side current sensing application. For a full analysis of the
circuit shown in Figure 46 including theory, calculations, simulations, and measured data see the 0-1A, single-
supply, low-side, current sensing solution, see TIPD129.
VCC
LOAD
ILOAD
RSHUNT
100m
5V
+ ^OPA196
±
LM7705
VOUT
RF
360k
RG 7.5k
Figure 46. OPA196 in a Low-Side, Current-Sensing Application
8.2.1.1 Design Requirements
The design requirements for this design are:
• Load current: 0 A to 1 A
• Output voltage: 4.9 V
• Maximum shunt voltage: 100 mV
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Product Folder Links: OPA196 OPA2196 OPA4196