Two more join high speed pipelined ADC family

Wolfson has expanded its family of high-speed A/D convertors for communications applications with two devices featuring 10bit 30 and 40Msample/s conversion performance.

Wolfson has expanded its family of high-speed A/D convertors for communications applications with two devices featuring 10bit 30 and 40Msample/s conversion performance.

Designed for 3V (WM2140) and 3-5V (WM2130) applications in commercial or industrial environments, the new devices deliver high signal to noise ratio and low total harmonic distortion, combined with low typical power consumption of 105mW.

"From digital copiers to multifunction computer peripherals and scanners to digital cameras, advanced electronic imaging technology is rapidly spreading though many industries as well as the consumer market", said David Milne, "the speed, resolution and single-supply operation of these pipelined ADCs are suited to these applications".

These devices have been designed to enable circuit developers to have the greatest flexibility for their implementation.

The analogue input can be either single-ended or differential, and there are a number of voltage reference options to match the user's design requirements.

The internal reference can also be bypassed in favour of an external reference to suit the dc accuracy and temperature drift requirements of the application.

The differential sample and hold input enables high common mode noise immunity and low distortion, and the PGA supports 1 and 2V maximum differential input modes plus a third mode for single-ended input signals such as composite video.

A wide input voltage range between REFB and REFT allows both devices to be applied in both imaging and communications systems.

Conversion is controlled by a single clock input, and an output enable pin is provided allowing several devices to share a common bus.

Low average power consumption combined with a power down mode (controlled via the mode selection pins, WM2130 or via the control registers WM2140), means the devices help meet the power budget requirements of many modern product designs including battery-powered equipment.

Both devices are available in 28-pin TSSOP packages with temperature ranges from 0 to +70C for commercial applications, or industrial applications requiring -40 to +85C operation.

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