9 Device and Documentation Support

9.1 Device Support

9.1.1 Development Support

9.1.1.1 TINA-TI Simulation Software (Free Download)

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 Design tools and simulation web page, TINA-TI simulation software offers

extensive post-processing capability that allows users to format results in a variety of ways. Virtual instruments

offer the ability to select input waveforms and probe circuit nodes, voltages, and waveforms, creating a dynamic

quick-start tool.

Virtual instruments offer users the ability to select input waveforms and probe circuit nodes, voltages, and

waveforms, creating a dynamic quick-start tool.

Figure 9-1 shows example TINA-TI circuits for the device that can be used to develop, modify, and assess the

circuit design for specific applications. Links to download these simulation files are given below.

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.

RWb

3Ÿ

Rwa

3Ÿ

Pt100 RTD

+

RTD Resistance

(Volts = Ohms)

VRTD

EMU21 RTD3

VT+

VT-

RTD+

RTD-

Mon-

Mon-

±

VT 25

RWd

3Ÿ

RWc

4Ÿ

Temp (°C)

(Volts = °C)

±

+

+

3 V

U2

OPA333-Q1

RGAIN

100 NŸ

RZERO

100 Ÿ

VOFF

U1 INA333-Q1

VREF

3 V

Use BF861A

Use BF861A

VREF

3 V

±

+

±

+

3 V

VREF

U3

OPA333-Q1

T1 BF256A

T3 BF256A

+

+

V

+

+

IREF1

IREF2

A

A

±

+

3 V

R1

2 NŸ

RG

RG

V-

V+

Ref

Out

2

1

8

3

7

5

6

RSET2

2.5 NŸ

RSET1

2.5 NŸ

In

EN

OUTF

OUTS

GNDS

GNDF

3 V

+

V4 3

VREF

3 V

C7

470 nF

U1 REF3212

PGA112

MSP430

OPA333-Q1

NOTE: RWa, RWb, RWc, and RWd simulate wire resistance. These resistors are included to show the four-wire sense technique

immunity to line mismatches. This method assumes the use of a four-wire RTD.

Figure 9-1. Four-Wire, 3-V Conditioner for a PT100 RTD With Programmable Gain Acquisition System

Download the TINA-TI simulation file for this circuit with the following link: PT100 RTD.

www.ti.com

INA333-Q1

SBOS464B – SEPTEMBER 2019 – REVISED JUNE 2023

Copyright © 2023 Texas Instruments Incorporated

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Product Folder Links: INA333-Q1