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Transimpedance amp receives as low as 42nAp-p

Posted: 04 Jan 2010 ?? ?Print Version ?Bookmark and Share

Keywords:transimpedance amplifier? signal? automotive?

Maxim Integrated Products unveils a high-sensitivity, high-dynamic-range transimpedance amplifier (TIA) for laser-based distance-measurement applications such as automotive active cruise control, industrial safety curtains, and consumer/construction range finders. The

MAX3806 TIA can receive an input signal as low as 42nAp-p and amplify it to the range required by low-cost differential ADCs, while handling overload signals of up to 2mAp-p. A pin-selectable gain setting of 30K? or 60K? allows the device to achieve typical bandwidths of 98MHz and 49MHz, respectively, for a variety of applications using the same device.

An on-chip attenuator can quickly reduce the gain by 14dB to help suppress unwanted signals. These integrated functions eliminate the need for multiple TIAs and analog switching muxes, thus saving board space and cost. The device's high dynamic range (42nAp-p to 40?Ap-p) enables designers to use the same front-end receiver circuit for multiple applications.

The MAX3806 operates from a single 5V supply, and is specified over the -40C to +105C AEC-Q100 Level 2 temperature range. It is available in a Pb-free, 12-pin TQFN package. Prices start at $2.35 (1,000-up, FOB USA). An evaluation kit is available to speed designs.

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