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16bit ADCs target precision measurement apps

Posted: 14 Dec 2012 ?? ?Print Version ?Bookmark and Share

Keywords:ADC? internal reference buffer? board space?

Maxim Integrated Products Inc. has unleashed what it describes as the industry's smallest bipolar 5V ADCs. According to the company, the MAX11166 and MAX11167 are the only 12-pin 16bit bipolar ADCs to integrate an internal reference buffer, saving cost and at least 88 per cent board space over similar products.

The ADCs feature Beyond-the-Rails technology that supports 5V input signal from a single positive 5V input rail. This technology eliminates the need for negative power supplies and simplifies designs, noted the company. At 19.5mW, 500ksps and 1?A in shutdown mode, the ADCs are applicable for precision measurement data acquisition systems (DASs), industrial/process control, medical instrumentation and automatic test equipment (ATE).

The MAX11166 and MAX11167 communicate using an SPI-compatible serial interface at 2.5V, 3V, 3.3V or 5V logic levels and have sample rates of 500ksps and 250ksps, respectively. The serial interface can be used to daisy-chain multiple ADCs for multi-channel simultaneous-sampling applications. It also provides a "busy" indicator option for simplified system synchronisation and timing. Maxim's proprietary input-charge-pump architecture allows direct sampling of high-impedance sources, eliminating the need for external analogue buffers to drive the ADC inputs in some applications, detailed the company.

Available in a robust 12-pin package (3 x 3mm TDFN), 5V input, 250ksps and 500ksps options, the ADCs operate from -40C to 85C with prices starting from $16.07 (1000-up, FOB USA). The 18bit extended resolution versions of these parts are slated for introduction in 1H13.

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