Part 1 of this FAQ looked at the basics of the 20-mA current loop, why it is still used extensively, and its primary attributes. In this part, we’ll look at how the analog current loop is used for digitized signals and at self-powered loops – two developments which have extended its life and viability. Q: […]
20-mA current loops, Part 1: Basic functions
You’ve been given an “easy” assignment: get the low-rate data from a temperature sensor to a control computer located 100 feet (30 m) away, in an industrial setting. After much investigation and assessment, you choose a widely used standard called the 20-mA loop, which has been in use for over 50 years, rather than Wi-Fi, […]
Filters suppress noise from 600 MHz to 2.7 GHz on audio lines
TDK Corporation has expanded the MAF1005G series of noise suppression filters for audio lines with four new MAF1005GAD-D types, which, thanks to their low DC resistance, feature a high rated current of up to 1.25 A. The new types employ TDK’s proprietary low-distortion ferrite that enables the new components to suppress noise at cellular frequencies from […]
Analog Top Talks in August on EDABoard.com forums
Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around analog ICs and analog design. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com. Transformerless power supply help – I use this power supply for a small product where the load is only […]
Miniature 4-pin ≥0.4mm-pitch logic package simplifies PCB assembly
Nexperia announced the four pin X2SON4 package which is the smallest logic package that can be used without requiring an expensive and fragile step-down mask. Nexperia developed the X2SON packages — part of its MicroPak package range — to provide the smallest footprint for logic functions while ensuring pad pitch remains 0.4mm or over (step-down masks are only […]
GaAs digital step attenuators from DC-40 GHz
The DSA family of GaAs digital step attenuators is intended to ease the design of high dynamic range receivers and instrumentation. These applications often must accomplish gain control of 50dB or more. Fine step DSAs (e.g., 0.5dB Least Significant Bit [LSB]) are often used for these applications. However, when a large attenuation change is needed, it […]
Single-chip drivers for low- to mid-power motor control designs
Simplifying the design of low-to-mid-power motor controls in the 7V-45V range, the STSPIN830 and STSPIN840 single-chip drivers from STMicroelectronics contain flexible control logic and low-RDS(ON) power switches for industrial applications, medical technology, and home appliances. The STSPIN830 for driving 3-phase brushless DC motors has a mode-setting pin that lets users control the three half bridges […]
Direct drive ultrasonic ICs detect obstacles up to four meters
With the ICs E524.32 and E524.33, Elmos Semiconductor presents the next generation of the “Direct-Drive” ultrasonic IC family for the vehicle’s ultrasonic parking assistance systems. The ICs can also be used for distance measurements in industrial applications or robotic applications. The “Direct Drive” approach enables a significant reduction in system costs, since the transformer and other […]
Electrical noise, Part 2: Additional perspectives
In Part 1, we looked at some facets of noise: sources, external versus internal (intrinsic) noise, and equations. Part 2 goes further into noise specifics. Q: What are some of the types of noise? A: It’s a long list. The same noise may have different names depending on the perspective of the person describing it, […]
Electrical noise, Part 1: Introductory concepts
Electrical noise is a consideration that engineers think, talk, worry, sometimes obsess about, and deal with nearly all the time, with few exceptions. In many applications, it is the limiting factor on ultimate achievable system performance. If it were not for the existence of noise, many design situations would be far, far easier. Noise is […]
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