Single Supply Op Amp with Drive to True GND

(ACTIVE) TIPD145

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Key Document

Description

Single supply rail-to-rail amplifiers are commonly used in analog systems.  In some cases it is important to have an amplifier output that drives very close to GND (i.e. a few microvolts).  However, no amplifier can inherently drive this close to GND.  This TI Precision Design shows a simple design modification that allows most standard single supply rail-to-rail amplifiers to drive very close to GND.

Features
  • Drives output to true GND
  • Avoids output swing limitations near GND using pull-down
  • Single-Supply Solution

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



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Bill of Materials (BOM)

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA313  1-MHz, Micropower, Low-Noise, Rail-to-Rail I/O 1.8-V Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA333  1.8V, 17µA, microPower, Precision, Zero-Drift CMOS Op Amp   Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA350  High-Speed, Single-Supply, Rail-to-Rail Operational Amplifiers MicroAmplifier™ Series  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA365  2.2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
OPA313 Download
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OPA333 Download Download
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OPA350 Download Download
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OPA365 Download Download
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 509 10 Dec 2013 7
Design files (2)
Title Abstract Type Size (KB) Date Views
PDF 185 15 Jan 2014 3
PDF 40 09 Jan 2014 3
More literature (1)
Title Abstract Type Size (KB) Date Views
PDF 743 13 Jan 2015 46
Related Tools & Software

Software (2)



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