New 16-bit ADCs offer lower power and high integration for precision measurement applications

December 13, 2012 // By Paul Buckley
Maxim Integrated Products, Inc. is now shipping what the company claims is the industry's smallest bipolar ±5 V, 16-bit analog-to-digital converters.

Available in a 9 mm2 package, the MAX11166 and MAX11167 are claimed to be the only 12-pin 16-bit bipolar ADCs to integrate an internal reference with buffer, saving cost and at least 88% board space over competing solutions. These highly integrated ADCs feature Beyond-the-Rails technology, which supports ±5 V input signal from a single positive 5 V rail. This technology eliminates the need for negative power supplies and simplifies designs. At 19.5 mW, 500 ksps, and 1µA in shu tdown 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 2.5 V, 3 V, 3.3 V, or 5 V logic levels and have sample rates of 500 ksps and 250 ksps, respectively. The serial interface can be used to daisy-chain multiple ADCs for multichannel simultaneous-sampling applications; it also provides a ‘busy’ indicator option for simplified system synchronization and timing. Maxim’s proprietary input-charge-pump architecture allows direct sampling of high-impedance sources, eliminating the need for external analog buffers to drive the ADC inputs in some applications.

The devices deliver 92.6dB SNR which supports wide-dynamic-range applications with best-in-class linearity (typically ±0.5 LSB INL, ±0.2 LSB DNL) allows precise measurements at half the power of nearest competitors.

Availability and Pricing

Available in a robust 12-pin package (3 mm x 3 mm TDFN), ±5 V input, 250 ksps and 500 ksps options pricing starts at $16.07 each in 1000 quantities.

The 18-bit extended resolution versions of these parts are scheduled for introduction in the first half of 2013.

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