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--Packaged in a tiny 8-pin SOIC, the AD7894 is the world's smallest and lowest cost 14-bit ADC


NORWOOD, Mass. (December 28, 1998) - Analog Devices, Inc. today introduced the AD7894, the world's first 14-bit ADC (analog-to-digital converter) available in an 8-pin SOIC package. The introduction of the AD7894, the smallest and lowest-cost ($7.95 in 1,000-piece quantities) 14-bit ADC in the world, reinforces Analog Devices' leadership position in the design and manufacture of high-performance ICs. With signal handling capability of up to 10 V off a single 5-V supply, the AD7894 is a 5 s successive approximation A/D converter that provides a throughput rate of 160 kSPS and typically consumes only 20 mW (in power-down mode, 15 W, typical). Additionally, the device contains an on-chip track/hold amplifier, an on-chip clock, and a high-speed serial interface.

The small size of the AD7894, coupled with a number of power saving features, make the device ideal for battery powered and portable applications. An automatic power-down mode, in which the converter goes to "sleep" once conversion is complete and "wakes up" before the next conversion cycle, provides additional power conservation. The device accepts a selection of bipolar analog input ranges including 10 V, 2.5 V, and 0 V to +2.5 V, which suit the AD7894 for data acquisition, instrumentation, industrial and communications applications. The AD7894 needs only a reference input and decoupling capacitors for a complete 14-bit data acquisition system.

Output data from the AD7894 is provided via a high-speed serial interface port. This two-wire serial interface has a serial clock input and a serial data output with the external serial clock accessing the serial data from the converter. In addition to the traditional dc accuracy specifications such as linearity, full-scale and offset errors, the AD7894 is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio.

The AD7894 is a pin-compatible upgrade to Analog Devices' AD7895 12-bit ADC. Additional information on all of Analog Devices' ADCs is available on the World Wide Web at

With fiscal 1998 sales of $1.23 billion, Analog Devices (NYSE: ADI) is a leading manufacturer of precision high-performance integrated circuits used in analog and digital signal processing applications. Headquartered in Norwood, Massachusetts, the company employs approximately 7,200 people worldwide and has manufacturing facilities in Massachusetts, California, North Carolina, Ireland, the Philippines and Taiwan.



Analog Devices Contact
Corporate Headquarters
One Technology Way
P. O. Box 9106
Norwood, MA 02062-9106
(781) 329-4700 / 1-800-262-5643

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