New precision amplifiers meet performance, power, size and price requirements demanded by today's portable medical and consumer designs.
Analog Devices Inc. announced a series of low-cost amplifiers that operate at low voltages and consume minimal power without sacrificing the accuracy required by portable applications that need precise signal conditioning. To extend battery life, amplifiers must offer very low operating and standby power, low-voltage operation, and rail-to-rail outputs.
Precision Op-amp: The AD8613family of operational amplifiers, which offers the industry’s best combination of low noise, low power, low voltage and low price.
More about the AD8538
Requiring a supply current of only 150 microamps, the AD8538 offers three times better temperature drift performance compared to the closest competing device—a drift performance level equivalent to products requiring over 1 mA of supply current. Its low power and high precision makes the AD8538 well-suited for markets such as medical equipment, pressure and thermal sensors and automotive electronics.
With only 0.01 microvolt/degree C offset drift, the AD8538 offers the industry’s lowest offset drift at low operating current. The device offers tremendous cost and time savings to designers as compared to a discrete system-level auto-calibration approach, which requires more complicated and costly hardware and software that can slow down time-to-market for new products. The device’s outstanding precision – 12 microvolts maximum offset and just 1 microvolt p-p of low-frequency noise — enable highly accurate and stable system designs without the cost, size and complexity of solutions utilizing external auto-calibration.
The AD8613, AD8617 and AD8619 devices are single, dual and quad op amps with rail-to-rail inputs and outputs that deliver 50 percent lower noise and 30 percent lower power with twice the precision of competing devices. Fully guaranteed low-voltage operation down to 1.8 V makes the AD861x ideal for battery-operated devices, such as temperature monitors and carbon dioxide detectors, where power management and reliability are critical.
The AD8613 family of devices feature supply current of only 38 microamps max and voltage operation from 1.8 V to 5 V. The devices achieve high levels of precision in consumer-medical and low-cost industrial applications with low offset voltage of 2 mV max, ultra-low input bias current of 1 pA max and low noise of 22 nV/rt-Hz. The devices are well suited for portable applications that require amplification while maintaining low noise throughout the signal path. The rail-to-rail outputs make them suitable for driving ADCs (analog-to-digital converters) and buffering DACs (digital-to-analog converters) in lower power 12-bit to 16-bit applications.
Applications
For the AD8538, typical high-resolution portable sensor applications, such as IR thermal scanners, require very low offset and offset drift to achieve accurate measurements. Portable medical applications for the AD861x include defibrillators, thermometers, blood pressure, glucose monitors and other bedside monitors; portable consumer applications include safety/emergency equipment such as smoke and remote power line detectors.
Pricing and Availability
The AD8538, available now in production quantities, is packaged in both TSOT-23 and narrow SOIC-8 packages and is priced at $0.89 per unit in 1,000-piece quantities.
The single AD8613 is sampling now with production quantities available in January 2006. The dual AD8617 and quad AD8619 are available in full production quantities now. The AD8613 is packaged in both SC-70 and 5-lead TSOT and is priced at $0.45 per unit in 1,000 piece quantities. The AD8617 is packaged in 8-lead MSOP and 8-lead narrow SOIC and is priced at $0.70 per unit in 1,000-piece quantities. The AD8619 is packaged in 14-lead TSSOP and 14-lead SOIC and is priced at $1.10 in 1,000-piece quantities.
