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Op amps benefit power-constrained portable apps

Norwood, Mass. — Offering low noise and distortion and drawing
just 1.1 mA of supply current, Analog Devices Inc.’s op amps are intended for
portable instrumentation, high-channel-count measurement and medical applications.

The ADA4841-x family satisfies a need among portable equipment
designers for op amps that achieve higher resolution by lowering
distortion and noise, according to ADI. The new op amps meet this requirement by
achieving 2 nV/√ Hz wideband voltage noise and 1.4 pA/√Hz wideband
current noise.

To maintain a low noise environment at lower frequencies, these amplifiers have low 1/f noise of 6 nV/√Hz and 13 pA/√ Hz at 10 Hz.

Additionally, the amplifiers are said to have extremely low distortion, with 111-dBc spurious free dynamic range (SFDR) at 100
kHz. This level of noise and distortion is accomplished for 1.1 mA of supply current, which saves power and minimizes heat in any application.

The ADA4841-x family has rail-to-rail outputs that allow a signal
swing within 100 mV of either supply rail, maximizing the linear range
for power supplies from 2.7 V to 12 V. On the input, the common mode
voltage range extends down to the negative supply.

Furthermore, these
amplifiers offer excellent dc precision with 500 μV max offset
voltage, the company said.

Both devices are offered over the extended industrial temperature range (-40°C to +125°C).

The ADA4841-1 (single) is available now in 6-pin SOT-23 and 8-pin SOIC
packages, and is priced at $1.59 per unit in 1,000-piece quantities. Click here for the ADA4841 data sheet.

The ADA4841-2 (dual) is sampling now with production quantities planned for September. It is offered in 8-pin SOIC and 8-pin MSOP and is priced at $2.29 per unit in same quantities. Click here for the ADA4841-2 data sheet.

Analog Devices , 1-800-262-5643, www.Analog.com.

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