Analog Devices' Low Power, Low Voltage Precision Amplifier Extends Battery Life In Portable Applications
“This new op amp further extends ADI’s broad portfolio of precision amplifiers that operate at low voltage, consume minimal power and are priced for high-volume applications,” said Steve Sockolov, product line director, Precision Signal Processing Group. “The AD8500 utilizes advanced design techniques to offer very low supply current and excellent offset performance. This combination enables accurate sensing in battery-powered applications that must operate for a long period of time without replacement or recharge.”
Low Power, Low Voltage
The AD8500 is a precision CMOS op amp that features a 1-microamp maximum supply current. The device operates from a single supply voltage of +1.8 V to +5.5 V or a dual supply voltage of ±0.9 V to ±2.75 V. The low voltage allows use with two cell batteries over the full discharge profile, thus extending battery lifetime.
High Precision
The AD8500 offers 1-millivolt max offset performance and a low 1-picoamp input bias current. The ability to swing rail-to-rail at both the input and output helps maximize the dynamic range and signal-to-noise ratio in systems that operate at very low voltages. The low offset voltage allows the AD8500 to be used in systems with high gain without having excessively large output offset errors and provides high accuracy without the need for system calibration.
Battery-Powered Applications
With its low power consumption, low input bias current and rail-to-rail input and output, the AD8500 is well-suited for a variety of battery-powered consumer, medical and safety applications, including electrocardiograms (ECGs), pulse monitors, glucose meters, smoke and fire detectors, security systems, gas detectors, backup battery sensors, insulin pumps and ultraviolet radiation (UV) detectors in cellular handsets. To minimize power consumption and maximize signal chain performance, the AD8500 can be used with ADI’s low-power precision analog-to-digital converters, such as the AD7788.
Availability and Pricing
The AD8500 precision op amp is available in production quantities now. Housed in a 5-lead SC 70 package, it is priced at $0.70 per unit in 1,000 piece quantities. The device is fully specified over the industrial temperature range of -40 degrees C to +85 degrees C.
For more information, please visit www.analog.com/AD8500.
웹사이트: http://www.analog.com
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