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Analog Devices’ JFET-Input Amplifier And Voltage References Increase Precision, Decrease Size And Power In Industrial Applications

Norwood, MA - Analog Devices Inc. today introduced a JFET (junction field effect transistor)-input op amp (operational amplifier) and a family of low power voltage references that have been optimized to achieve an unparalleled combination of high precision, ultra small footprint and very low power consumption for industrial and instrumentation applications.

The ADA4000-1 offers the best precision of any op amp in its class with 80 percent lower input bias current and 50 percent lower offset voltage than competing solutions, enabling precise measurement and control functions in devices that rely on the highest accuracy, such as patient monitoring equipment, data acquisition and safety component systems. ADI’s innovative iPolar™ trench isolation process technology allows the device to reduce power consumption by 75 percent in a package that is 75 percent smaller than existing solutions, reducing or eliminating the need for heat sinks or cooling fans typically required for equipment operating at harsh industrial temperatures. Priced lower than competing devices, the ADA4000-1 brings a new level of precision and value to industrial, instrumentation and other high-voltage applications.


Low-Power Voltage References
Analog Devices’ new ADR12x family of low-power voltage references combines high precision and low-voltage operation within a very small TSOT-23 package. The devices feature the lowest temperature drift performance (9 ppm per degree C) over the extended industrial temperature range (–40 degrees C to +125 degrees C)—a 10 percent improvement over competing devices—and require very little supply current, only 85 microA, for operation. This improvement in precision within a small footprint is optimized by the trimming efficiencies of iPolar process technology.

The ADR12x family’s combines low power, high precision and compact size, making them the perfect companion chip for data converters used in handheld and battery-powered industrial and medical instrumentation equipment that require robust performance in space- and power-constrained environments. The ADR12x are also suitable for automotive electronics applications such as battery monitoring and engine control units. The devices work well with ADI’s 16-bit PulSAR® ADCs, including the new AD761x family.

“ADI continues to develop products with specifications optimized to meet the exacting needs of industrial manufacturers,” said Steve Sockolov, product line director, Precision Signal Processing group, Analog Devices. “The requirements of industrial and instrumentation systems are driving the need for amplifiers and voltage references that provide higher levels of precision, smaller package sizes and which improve layout flexibility. The ability of these products to combine accuracy, small size and minimal power consumption, means industrial designers will no longer have to struggle with trading off performance, price, power and package size.”

More About the ADA4000-1
The ADA4000-1 has extremely low input bias current of 10 pA (pico amps) max, addressing the needs of applications, such as photodiode amplifiers, where current error sources cannot be tolerated. Operating on a supply voltage from ±5 V to ±15 V, the device features input offset voltage of just 1 mV and low noise of 15 nV/rt Hz. Bandwidth is 6 MHz; and the high slew rate is 20 V/microsec. The combination of precision and speed makes the device well-suited for reference buffers, level shifting and active filters in industrial and instrumentation equipment; and the addition of high input impedance makes it ideal for temperature, pressure and force sensing in industrial applications.

To ease the thermal and space considerations of higher temperature industrial climates, the ADA4000-1 attains its speed and precision performance on a low 1.1 mA supply current and is available in a tiny 2.9 mm × 3 mm TSOT-23 package. The ADA4000-1 performs well with ADI’s precision converters (AD7457, AD7893, AD7862, AD7545, and AD5327) and voltage references (AD584 and ADR01).

Availability and Pricing
The ADA4000-1 is sampling now and will be available in production quantities in March 2006. Dual and quad versions will be available in the first half of 2006. The ADA4000-1 is fully specified over the extended industrial temperature range of –40 degrees C to +125 degrees C, and is packaged in both a 5-lead TSOT-23 and 8-lead SOIC. Pricing is $0.91 per unit in 1,000-piece quantities.

The ADR12x family, including the ADR127 (1.25 V), ADR121 (2.5 V) and ADR125 (5.0 V) are sampling now and will be available in full production quantities in January 2006. Available in 6-lead TSOT-23 packaging, each device is priced at $1.19 per unit in 1,000 piece quantities.

Martes, 18 Octubre, 2005 - 10:56
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