REF5010 datasheet(12/28 Pages) TI

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ADS8326

REF5040

REF

OUT

GND

+IN

+5V

OPA365

Input

Signal

0Vto4V

+5V

GND

BYPASS

1 F

50W

1.2nF

22 F

2.5V

+2.5V

+5V

NOTE:Bypasscapacitorsnotshown.

10kW

OPA735

+5V

DNC

TEMP

OUT

GND

DNC

TRIM/NR

REF5025

1 F

REF5010, REF5020

REF5025, REF5030

REF5040, REF5045, REF5050

SBOS410E – JUNE 2007 – REVISED JUNE 2010

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APPLICATION CIRCUITS

DATA ACQUISITION

NEGATIVE REFERENCE VOLTAGE

Data acquisition systems often require stable voltage

For applications requiring a negative and positive

references to maintain accuracy. The REF50xx family

reference voltage, the REF50xx and OPA735 can be

features low noise, very low drift, and high initial

used to provide a dual-supply reference from a 5V

accuracy

for

high-performance

data

converters.

supply. Figure 33 shows the REF5025 used to

Figure 34 shows the REF5040 in a basic data

provide a 2.5V supply reference voltage. The low drift

acquisition system.

performance of the REF50xx complements the low

offset voltage and zero drift of the OPA735 to provide

an accurate solution for split-supply applications.

Care must be taken to match the temperature

coefficients of R1 and R2.

Figure 34. Basic Data Acquisition System

Figure 33. The REF5025 and OPA735 Create

Positive and Negative Reference Voltages

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Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050

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