Product category: Analogue and Mixed Signal ICs
News Release from: Analog Devices | Subject: AD7677 PulSAR
Edited by the Electronicstalk Editorial Team on 25 January 2002

ADC boasts speed,
accuracy and low power

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Analog Devices claims its latest ADC is twice as fast, twice as precise and four times more power efficient than competitive parts

The AD7677 PulSAR 1Msample/s successive-approximation (SAR) ADC is accurate to 1LSB integral nonlinearity (INL), delivering industry-leading speed and precision to a variety of applications. ADI reached this new level of precision only months after the announcement of the AD7671, the first 1Msample/s 16bit SAR convertor.

SAR convertors, which comprise the majority of the ADC market, are widely considered the most cost-effective technology for applications that require very precise digital modelling of higher frequency analogue signals.

The AD7677 is a fully differential ADC that offers16bit resolution with no missing codes.

The AD7677 has no pipeline delay and operates at three different speeds, including 1Msample/s 'warp' mode for asynchronous sampling applications, 800Ksample/s 'normal' mode, and an 'impulse' mode, in which power consumption varies with throughput rate.

Signal to noise and distortion (SINAD) for the AD7677 is typically 94dB, with a minimum of 92 dB.

The device operates from a single 5V power supply and dissipates only 115mW (typical).

It consumes only 7uW when in power-down mode.

The AD7677 is designed to interface easily with the rest of the circuit.

Bipolar/unipolar inputs accommodate variable input ranges.

An internal conversion clock, error correction circuits, and both serial and parallel system interface ports are integrated on-chip.

With its compact, 9 x 9 mm 48-lead LQFP, the AD7677 saves board space, is pin compatible with the AD7664, AD7675 and AD7676 PulSAR family of 16bit SAR convertors, and is specified to operate from -40 to +85C.

The AD7677 is priced at $39.76 in 1000-piece quantities.

Evaluation boards and production quantities are now available.

(This was Electronicstalk's Top Story on 25 January 2002)

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