OPA188

-15 V

15 V

U3

OPA188

15 V

-15 V

U2

+

VCM

10

V

R

10 kW

5

R

10 kW

7

R

500 W

G

V

P

OUT

V

N

OUT

U1

INA159

5 V

V

OUT

(1)

Ref 1

Ref 2

Sense

OPA188

SBOS642A – MARCH 2013 – REVISED MARCH 2013

www.ti.com

APPLICATION EXAMPLES

The following application examples highlight only a few of the circuits where the OPA188 can be used.

TINA-TI™ (Free Download Software)

Using a TINA-TI SPICE-Based Analog Simulation Program with the OPA188

TINA™ is a simple, powerful, and easy-to-use circuit simulation program based on a SPICE engine. TINA-TI is a

free, fully-functional version of the TINA software, preloaded with a library of macromodels in addition to a range

of both passive and active models. TINA-TI provides all the conventional dc, transient, and frequency domain

analysis of SPICE as well as additional design capabilities.

Available as a free download from the Analog eLab Design Center, TINA-TI offers extensive post-processing

capability that allows users to format results in a variety of ways. Virtual instruments offer users the ability to

select input waveforms and probe circuit nodes, voltages, and waveforms, creating a dynamic quick-start tool.

NOTE

These files require that either the TINA software (from DesignSoft™) or TINA-TI software

be installed. Download the free TINA-TI software from the TINA-TI folder.

Figure 44 shows an example of how the OPA188 can be used as a high-voltage, high-impedance front-end for a

precision, discreet instrumentation amplifier with attenuation. The INA159 provides the attenuation that allows

this circuit to easily interface with 3.3-V or 5-V analog-to-digital converters (ADCs). Click the following link

download the TINA-TI file: Discreet INA.

Figure 44. Discrete INA + Attenuation for ADC with 3.3-V Supply

20

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Product Folder Links: OPA188