In my last blog post, I discussed why instrumentation amplifier power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) improve as the amplifier’s gain increases.
Returning to the simplified model of an instrumentation amplifier…
In my last blog post, I discussed why instrumentation amplifier power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) improve as the amplifier’s gain increases.
Returning to the simplified model of an instrumentation amplifier…
It’s been three weeks since we launched “The Hub” here on E2E, and we’re already branching off into new and exciting areas. Today we kicked off a sister blog on Planet Analog called the “Precision Hub” with a blog post from…
Some of the most frequently asked questions we get in the Precision Amplifiers forum here in the E2E Community™ have to do with an IC’s long-term stability of various parameters. Nothing in nature is static, and the datasheet parameters are…
This technical article was updated on July 23, 2020.
Engineers like to simplify the design process using many rules to get the design going in the right direction before optimizations occur. One of my favorites is to always drive the inputs of an analog…
In the last few months, I’ve seen at least four cases of the wrong understanding of the “real Vos” of an op amp.
Figure 1 shows the specs for the OPA363 op amp, a single supply 1.8V to 5.5V op amp…
In this month’s post on our companion blog, the “Precision Hub” on Planet Analog, I share an idea I had about EMI and lightning.
After watching a storm, I started thinking about the EMI challenges we encounter with precision systems…
As we get ready to "gear up” here on the TI Precision Designs Hub (AKA "The Hub), we thought you might want to first learn a little about the experts who will be sharing their analog design tips with you in the coming weeks and months.…
Before working as an applications engineer, I worked as an IC test development engineer here at TI. One of my projects was to characterize an I2C temperature sensor. After writing some software, I threw together a hand-wired prototype board. I was in…
hub (hub)
noun
1. the central part of a wheel, into which spokes are inserted.
2. a center around which other things revolve or from which they radiate.
Welcome to the TI Precision Designs Hub. Our new home here on E2E to provide tips, tricks, and design…
Winter is my favorite time to work on hobby projects in Texas. My garden is filled with easy-to-maintain winter or cover crops, and it’s cool enough to work outside without overheating.
While working on a recent project, I had to re-route some…
Our monthly post on our sister blog, the “Precision Hub” on Planet Analog, focuses on transient stability testing.
In it, I share a recent experience I had with one of our summer interns. He was taking transient stability data on a design…
Calculating resistor self-heating. It’s a fairly fundamental concept that is often unfamiliar to, or overlooked by, many engineers.
I was reminded of its importance while explaining the theory behind a precision resistance temperature detector …
My esteemed colleague, John Caldwell (not to be confused with ‘John’ the intern), authored a couple excellent blogs about instrumentation amplifier (INA) power supply and common-mode rejection ratio (PSRR & CMRR). (See “Dealing with rejection…
Last week for Halloween, I handed out candy to kids in all sorts of costumes. Some occupations make great costumes: fireman, policeman, doctor, professional athlete, and of course astronaut. But I’ll admit that every year I’m a bit disappointed that no…
Have you ever wondered why a traditional 3-op amp instrumentation amplifier’s offset voltage changes with gain? Figure 1 is an excerpt from the INA333 datasheet that shows an example of the dependence of the…
Part 1:
2-wire 4-20 mA sensor transmitters are very common in industrial control and automation. They are popular because they allow a remote process to be monitored with only two analog signal wires. The two wires carry both the power for the sensor…
In honor of National Puzzle day here in the United States of America, I humbly present six op amp puzzles for you to puzzle on until your puzzler is sore – or at least until next week when I will publish the right answers!
I’ve even provided you…
In this month’s post on our sister blog, the “Precision Hub” on Planet Analog, I share a recent question I got from a customer in the Precision Amplifier Forum here in the TI E2E™ Community.
His circuit used an op amp to amplify…
Monitoring the voltage level of a coin cell in a portable device or in back-up service is a common, simple application for modern CMOS operation amplifiers (op amps).
Figure 1 shows an implementation using the 1.8-V, OPA333 zero-drift op amp. The coin…
“A clever person solves a problem. A wise person avoids it.” – Albert Einstein
Albert Einstein would have loved analog design – there is always an element of relativity involved. For example, in data acquisition systems, accuracy is relative…
Engineers have struggled for decades to understand the mysterious plot of common-mode voltage (VCM) vs. output voltage (VOUT). The most common VCM vs. VOUT shape appears in Figure 1, although the shape often varies by device and setup configuration.
…When troubleshooting non-functional or poorly performing circuits, engineers often run simulations or other analyses that consider the circuit at the schematic level. If these methods fail to resolve the issue, even…
The instrumentation amplifier (IA) is an integrated combination of op amps and feedback resistors used to accurately acquire and amplify signals.
Don’t know about instrumentation amps? Get a very quick start…
