32-Bit SAR ADC Offers Both Speed & Accuracy


Linear Technology introduced an ultrahigh precision 32-bit successive approximation register (SAR) analog-to-digital converter (ADC) ideal for applications that simultaneously require precision measurement and fast tracking of signals such as industrial control, medical instrumentation, seismology, energy exploration, automated test equipment (ATE), etc.

In contrast to traditional solutions employing two distinct unmatched ADCs, the unique combination of both accuracy and speed in the LTC2508-32 claims to enable much higher system performance while reducing solution size and lowering component count.

To achieve both high speed and accuracy, many systems use a combination of high resolution delta-sigma ADC and a high speed SAR ADC. The LTC2508-32 eliminates the need of two ADCs in such systems by simultaneously providing both a 32-bit low noise digitally filtered output and a 14-bit 1Msps no latency output. The high accuracy and high speed outputs are perfectly matched, even as the operating temperature, supply and stress vary, says the company.

Operating from a single 2.5V supply, the new ADC features a fully differential input range up to ±VREF , with VREF ranging from 2.5V to 5.1V. The device supports a wide common mode range from 0V to VREF simplifying analog signal conditioning requirements.


The LTC2508-32 is available today in a space saving 7 × 4mm 24-lead DFN package. Pricing starts at $8.95 each in 1,000-piece quantities. Samples and demo boards are available.

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