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
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

TIDR354.PDF (185 KB)

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

TIDC209.ZIP (15 KB)

Detailed schematic diagram for design layout and components

TIDR335.PDF (40 KB)

Detailed schematic diagram for design layout and components

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: PDF
High-speed op amps (GBW ≥ 50 MHz)

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

Data sheet: PDF | HTML

Start development

Software

Support software

TIDC235 — TIPD145 Simulation

Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIPD145 Single Supply Op Amp with Drive to True GND
Download options

TIDC235 TIPD145 Simulation

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Latest version
Version: 01.00.00.00
Release date: Jan 8, 2014
Hardware development
Reference design
TIPD145 Single Supply Op Amp with Drive to True GND

Release Information

The design resource accessed as www.ti.com/lit/zip/tidc235 or www.ti.com/lit/xx/tidc235/tidc235.zip has been migrated to a new user experience at www.ti.com/tool/download/TIDC235. Please update any bookmarks accordingly.

Technical documentation

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

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