RMS-to-DC converter offers high accuracy and dynamic range
August 16, 2011 // Christoph Hammerschmidt
Analog Devices has developed an integrated true RMS-to-DC converter offering a very high usable dynamic range and the ability to measure extremely low signal levels with high accuracy and no drop in settling time. The AD8436 is targeting remote, portable battery-powered instrumentation, energy and automotive applications where limited board space and outdoor environments are considerations.
The AD8436 precision monolithic true RMS-to-DC converter features AC conversion accuracy to better than ± 0.5 percent. Uniform settling for widely variant input values enables consistent conversion rates with results displayed promptly for near-zero and high-level AC inputs. The AD8436 is immune to temperature, crest factor and supply voltage variations, the vendor claims. Zero DC offset voltages at the converter output simplify calibration. This performance is packed into a compact 4 mm x 4 mm package integrated with a FET input and precision DC buffer amplifiers and consumes only 300 µA of power.
RMS (root mean square) is a fundamental measurement of the magnitude of an AC and DC signal and is a better measure of the power in a signal than simple averaging. RMS-to-DC converters are used in applications where precise, low power measurement of AC/DC signals is the prime objective. The AD8436 system-on-a-chip design computes the precise DC equivalent of the RMS value and provides a level of linearity and accuracy across the entire input range that enables engineers to design systems with 90 dB of dynamic range.
Accpording to Analog Devices, the AD8436 extends the crest-factor to 10 - approximately double the current industry-standard digital solution - with minimal loss of accuracy. It is particularly useful for high transit signals and can be used in designs currently using ADIs low-power, true RMS-to-DC converters such as the AD736 and AD737 with improved performances. The device is laser trimmed and characterised at 300-mV RMS input and comes with dual and single power supplies. The AD8436 is the first RMS-to-DC converter specified to operate in the extended industrial temperature range of -40°C to 125°C. It is also available in a 0°C to 70°C temperature range version.
For data sheet and samples, visit: www.analog.com/AD8436.
Design win; IDT meets IKEA
April 24, 2015
Integrated Device Technology, Inc. (IDT) has disclosed that IKEA has chosen IDT’s wireless power transmitters to embed in ...
Eurotech to offload its cloud offering to iNebula
Electric vehicles: Driving range decides
Samsung details its flex display
3D-printing aerogels for energy storage
Gartner lowers 2015 chip market growth forecast
April 23, 2015
A mix of currency shifts, excess inventory and the end a PC upgrade cycle is set to slow growth in the global semiconductor ...
Hexagon, Xylon join forces for smart CT-based quality control systems
PSA, IBM tie Connected Car to the Internet of Things
Disposable sensor patch analyses golfers' swing
- Smart Capacitive Design Tips
- Wireless MCUs and IoT
- Battery Management System Tutorial
- Deciding if Automated Test is right for your Company
InterviewInfineon: CAN FD success goes at the expense of FlexRay
The faster version of the venerable CAN bus, CAN FD is currently taking off at several carmakers. Infineon's Thomas Böhm, Head of Body / Automotive, believes this could well go at the expense of FlexRay. ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, DecaWave is offering EETimes Europe's readers the chance to win two TREK1000 kits to evaluate its Ultra-Wideband (UWB) indoor location and communication DW1000 chip in different real-time location system topologies.
Worth €947, the kit allow designers to prove a concept within hours and have a prototype ready in days. Based on the two-way ranging scheme, the kit lets you test...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.