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OPA333AIDR Datasheet(PDF) 10 Page - Texas Instruments |
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OPA333AIDR Datasheet(HTML) 10 Page - Texas Instruments |
10 / 28 page www.ti.com R 1 V EX V OUT V REF R 1 OPA333 R R R R +5V NOTE:1%resistorsprovideadequatecommon-moderejectionatsmallground-looperrors. OPA333 ADS1100 Load V I C 2 R 1 4.99k W R 3 4.99k W R 4 48.7k W R 2 49.9k W +5V 3V REF3130 R 7 1.18k W R SHUNT 1 W R 6 71.5k W R N 56 W R N 56 W (PGAGain=4) FS=3.0V StrayGround-LoopResistance I LOAD OPA333 Output R SHUNT Load V+ V+ R G R L R (2) 1 10k W R BIAS +5V zener (1) Twozener biasingmethods areshown. (3) MOSFETratedto stand-offsupplyvoltage suchasBSS84for upto50V. (1)zenerratedforopampsupplycapability(thatis,5.1VforOPA333). (2)Current-limitingresistor. (3)ChoosezenerbiasingresistorordualNMOSFETs(FDG6301N,NTJD4001N,orSi1034) NOTES: OPA333 OPA2333 SBOS351C – MARCH 2006 – REVISED MAY 2007 Figure 21 shows the basic configuration for a bridge amplifier. A low-side current shunt monitor is shown in Figure 22. RN are operational resistors used to isolate the ADS1100 from the noise of the digital I2C bus. Since the ADS1100 is a 16-bit converter, a precise reference is essential for maximum accuracy. If absolute accuracy is not required, and the 5V power supply is sufficiently stable, the REF3130 may be omitted. Figure 21. Single Op Amp Bridge Amplifier Figure 22. Low-Side Current Monitor Figure 23. High-Side Current Monitor 10 Submit Documentation Feedback |
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