Industry’s smallest 18-Bit Successive Approximation Register ADC saves 70% board space

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By eeNews Europe

Available in a 3mm x 3mm TDFN package, the bipolar MAX11156 integrates an internal reference and reference buffer, saving cost and at least 70% board space over competing solutions. With 18-bit resolution, this high-performance ADC features Beyond-the-Rails technology, which supports a ±5V input from a single positive 5V input rail. This technology eliminates the need for negative power supplies and simplifies designs. With 18-bit resolution and a 500ksps sampling rate, the MAX11156 is ideal for automatic test equipment (ATE), industrial control systems, medical instrumentation and robotics, where high accuracy and tiny size are paramount.
Its monotonic transfer characteristic, fast settling time and lack of latency means the MAX11156 is aimed at fast, high-precision digital control-loop systems. It provides 18-bit resolution with no missing codes, excellent DC accuracy (0.5 LSB DNL and 2.5 LSB INL) and excellent AC performance (94.6dB SNR and -105dB THD). Additionally, the MAX11156 communicates using a SPI-compatible serial interface, which can be used to daisy-chain multiple ADCs in parallel for multichannel applications. This interface can also provide a busy indicator to simplify system synchronization and timing.
The 18-bit performance produces 94.6dB SNR, -105dB THD (typ), and guarantees no missing codes. The bipolar input range measures a ±5V (10VP-P) input range while operating from a single 5V supply and simplifies external signal conditioning and is specified over the -40 °C to +85 °C temperature range.
“The MAX11156 18-bit SAR ADC offers excellent accuracy and high integration in a tiny package,” said Carmelo Morello, Senior Business Manager at Maxim Integrated. “Its release showcases our dedication to highly integrated SAR ADCs, 16 bits and up.” “Eighteen-bit ADCs are meeting the need for increased precision in industrial and medical applications,” said Colin Barnden, Principal Analyst at Semicast. “This allows these systems to improve diagnostic capability.”
Pricing starts at $16.90.


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