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

REF35 with low current consumption and class leading performance specifcations is suitable reference for

multiple applications. The device can also be used as a precision low noise power supply to sensor or data

converter instead of traditional LDO or DC/DC based power supply. Basic applications includes positive/negative

voltage reference and data acquisition systems. The table below shows the typical application of REF35 and its

companion ADC/DAC.

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

APPLICATIONS

ADC/DAC

PLC - DCS

ADS7028, DAC8881, ADS1287, ADS7953

Rack Server

ADS7028, ADS7128, ADS7138

Field Transmitters - Pressure, Flow

ADS124S08

Optical Module, Optical Line Card

ADS7068, ADS7138

Medical Blood Glucose Meter

ADS1112

10.2 Typical Application: Negative Reference Voltage

For applications requiring a negative and positive reference voltage, the REF35 and OPA735 can be used to

provide a dual-supply reference from a 5-V supply. Figure 10-1 shows the REF35250 used to provide a 2.5-V

supply reference voltage. The low drift performance of the REF35250 complements the low offset voltage and

zero drift of the OPA735 to provide an accurate solution for split-supply applications. Take care to match the

temperature coefficients of R1 and R2.

REF35250

R2

10 k

-

+

GND

+5 V

+5 V

+2.5 V

-5 V

-2.5 V

1

2

3

4

6

5

OPA735

Figure 10-1. REF35 and OPA735 Create Positive and Negative Reference Voltages

REF35

SNAS809 – DECEMBER 2021

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