TIPD145
Single Supply Op Amp with Drive to True GND
TIPD145
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
Industrial
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
OPA313 — Single, 5.5-V, 1-MHz, low quiescent current (50-μA), RRIO operational amplifier
Data sheetHigh-speed op amps (GBW>=50MHz)
OPA365 — 2.2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail Operational Amplifier
Data sheetStart development
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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