10

10

Input Signal

124

1 nF

ADS1287

VIN

REF

CIN

1 µF

COUT

10 µF

±

+

REF34xx-EP

Copyright © 2017, Texas Instruments Incorporated

15

REF3425-EP, REF3440-EP

www.ti.com

SBAS942 – DECEMBER 2018

Product Folder Links: REF3425-EP REF3440-EP

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Copyright © 2018, Texas Instruments Incorporated

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. Customers should

validate and test 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 data sheet 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-EP and its companion ADC/DAC.

Table 1. Typical Applications and Companion ADC/DAC

Applications

ADC/DAC

PLC - DCS

DAC8881, ADS8332, ADS8568, ADS8317,

ADS8588S, ADS1287

Display Test Equipment

ADS8332

Field Transmitters - Pressure

ADUCM360

Video Surveillance - Thermal Cameras

ADS7279

Medical Blood Glucose Meter

ADS1112

10.2 Typical Application: Basic Voltage Reference Connection

The circuit shown in Figure 19 shows the basic configuration for the REF34xx-EP references. Connect bypass

capacitors according to the guidelines in Input and Output Capacitors.

Figure 19. 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 2 as the input parameters.

Table 2. Design Example Parameters

DESIGN PARAMETER

VALUE

5 V

2.5 V

REF34xx-EP input capacitor

1 µF

REF34xx-EP output capacitor

10 µF