Date: 14/04/2011

Precision op amp from ADI offers zero drift and lowest voltage noise in the industry

Analog Devices, Inc. has introduced ADA4528, a zero-drift operational amplifier designed for instrumentation and medical equipment applications that require precision over time and temperature without system calibration. Analog Devices claims this is the industry's lowest noise op-amp delivering a 26 percent lower voltage noise at 40 percent less power consumption than the closest competing amplifiers.

The key features of this precision amplifier chip includes:

Ultra-low integrated voltage noise of 99 nVp-p over 0.1 Hz - 10 Hz enabling 24-bit resolution over 150 kHz in A/D converters while improving system accuracy.
The 5.3-nV/rtHz voltage noise density allows designers for the first time to use the zero-drift amplifier in broadband applications, such as piezoelectric transducers and precision data acquisition systems.
Offers low offset voltage of 2.5 µV max and offset-voltage drift of 0.015 µV/°C max.
It has a 140 dB gain and a CMRR (common-mode rejection ratio) of 135 dB and a 130 dB PSRR (power-supply rejection ratio), making it well-suited for precision amplification of low-level signals in applications such as position and pressure sensors, strain gages, and medical instrumentation.
The ADA4528 is fully specified to operate from a 2.2-V to 5.5-V single-voltage supply over the extended industrial temperature range (-40°C to +125°C) and is available in an 8-lead MSOP (Mini Small Outline Package).
Rail-to-rail input and output.

"This new precision amplifier is a flagship product in ADI's operational amplifier portfolio," said Peter Real, vice president, Linear and Radio Frequency Products and Technology Group, Analog Devices. "ADI's unique, patented chopping technique allows the ADA4528 to achieve the high levels of accuracy required for low-frequency sensor measurements in systems such as data acquisition, weigh scale and precision medical instrumentation applications."

Availability and Pricing: Now at a price of $1.15 for 1K pieces
Package: 8-lead MSOP