10 Application and Implementation

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, as well as validating and testing their design

implementation to confirm system functionality.

10.1 Application Information

As this device has many applications and setups, there are many situations that this datasheet can not

characterize in detail. Basic applications includes positive/negative voltage reference and data acquisition

systems. The table below shows the typical application of REF34xx and its companion ADC/DAC.

Table 10-1. Typical Applications and Companion ADC/DAC

Applications

ADC/DAC

PLC - DCS

DAC8881, ADS8332, ADS8568, ADS8317,

ADS8588S, ADS1287

Display Test Equipment

ADS8332

Video Surveillance - Thermal Cameras

ADS7279

Medical Blood Glucose Meter

ADS1112

10.2 Typical Application: Basic Voltage Reference Connection

The circuit shown in Figure 10-1 shows the basic configuration for the REF34xx references. Connect bypass

capacitors according to the guidelines in Section 10.2.2.1.

10

10

Input Signal

124

1 nF

ADS1287

VIN

REF

CIN

1µF

COUT

10 µF

-

+

REF34xx

Copyright © 2017, Texas Instruments Incorporated

Figure 10-1. Basic Reference Connection

10.2.1 Design Requirements

A detailed design procedure is described based on a design example. For this design example, use the

parameters listed in Table 10-2 as the input parameters.

Table 10-2. Design Example Parameters

DESIGN PARAMETER

VALUE

5 V

2.5 V

REF34xx input capacitor

1 µF

REF34xx output capacitor

10 µF

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REF3425, REF3430, REF3433, REF3440, REF3450

SBAS804F – SEPTEMBER 2017 – REVISED JUNE 2021

Copyright © 2021 Texas Instruments Incorporated

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