TIPD145

Single Supply Op Amp with Drive to True GND

TIPD145

Design files

Overview

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

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDR335.PDF (40 K)

Detailed schematic diagram for design layout and components

TIDC209.ZIP (15 K)

Detailed schematic diagram for design layout and components

TIDR354.PDF (185 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

Products

Includes TI products in the design and potential alternatives.

General-purpose op amps

OPA313Single, 5.5-V, 1-MHz, low quiescent current (50-μA), RRIO operational amplifier

Data sheet document-pdfAcrobat PDF
High-speed op amps (GBW>=50MHz)

OPA3652.2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail Operational Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML

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Software

Support software

TIPD145 Simulation – TIDC235.ZIP (15 K)

Technical documentation

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Type Title Date
* User guide Single-Supply Op Amp With True Drive to GND Design Guide Dec. 10, 2013
More literature Precision Amplifier Quickstart Kit brochure (Rev. A) Jan. 13, 2015

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