Analog Devices Press Release - April 12, 2011
Zero-Drift Amplifier from Analog Devices Achieves
- ADI’s ADA4528 precision, zero-drift amplifier features industry’s lowest noise floor, enabling designers to
optimize system resolution by amplifying smaller input signals.
Industry’s Lowest Voltage Noise
NORWOOD, Mass.--( BUSINESS WIRE)--
Analog Devices, Inc. (ADI), a world leader in
semiconductors for high-performance signal processing applications and leading supplier of amplifier technology,
introduced today the industry’s
lowest-noise, zero-drift operational amplifier. The ADA4528
op amp is designed for instrumentation and medical applications that require precision over time and
temperature without system calibration. The breakthrough design achieves an ultra-low integrated voltage noise of
99 nVp-p over 0.1 Hz - 10 Hz meaning that the ADA4528 delivers a 26 percent lower voltage noise at 40 percent less
power consumption than the closest competing amplifiers. This improves system SNR (signal-to-noise ratio) and
lowers the noise floor, 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.
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“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.”
zero-drift amplifier offers low offset voltage of 2.5 µV max and the industry’s lowest guaranteed
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).
Key Features of the ADA4528 Zero-drift Amplifier
Availability and Pricing
- Ultra-low offset: 2.5 μV maximum
- Ultra-low offset voltage drift: 0.015 μV/°C maximum
- Ultra-low noise: 5.3nV/@Hz at f=1 kHz
- Open-loop voltage gain: 140 dB minimum
- CMRR: 135 dB minimum
- PSRR: 130 dB minimum
- Single-supply operation: 2.2 V to 5.5 V
- Dual-supply operation: ±1.1 V to ±2.75 V
- Rail-to-rail input and output
About Analog Devices
Innovation, performance, and excellence are the cultural pillars on
which Analog Devices has built one of the longest standing, highest growth companies within the technology sector.
Acknowledged industry-wide as the world leader in data-conversion and signal-conditioning technologies, Analog
Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Celebrating over
40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital
signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and
manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock
Exchange under the ticker “ADI” and is included in the S&P 500 Index.
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Date Posted 3/11/2011
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