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Tiny ADCs simplify system design

Posted: 26 Aug 2009 ?? ?Print Version ?Bookmark and Share

Keywords:ADC? oscillator? system monitoring?


Texas Instruments Inc. has unveiled a family of 16bit ADCs that are claimed to be 70 percent smaller than the nearest competition. Packaged in a Pb-free QFN measuring 2mm x 1.5mm x 0.4mm, the ADS1115 family offers system space savings, provides product options for scalable integration to reduce component count and simplify design. The family supports battery monitoring, portable instrumentation, industrial process control, smart transmitters, medical instrumentation and other industrial and consumer systems.

Designed for precision, power efficiency and ease of implementation, the ADS1115 family performs conversions at programmable data rates up to 860Sps, consuming just 150?A (typical) of supply current and operating down to 2V. The ADS1115 is the most highly integrated member of the new family, incorporating an oscillator, low-drift reference, programmable gain amplifier, comparator and four-channel input multiplexer into a tiny package. This family also includes 12bit versions for increased flexibility.

"Analog customers require ever higher functionality and performance without sacrificing system size and power in order to take their products to the next level," said Art George, senior VP of the high-performance analog business unit at TI. "By reducing size by 70 percent and delivering a complete family of integration and resolution options, the ADS1115 will help designers achieve a smaller system footprint, lower power, higher performance and easy design implementation."

The ADS115 is a complete family with product options for scalable selection of on-chip integration reduces component count and simplifies design. It offers 14x faster sampling rate and supports demanding measurement requirements. The devices also feature integrated programmable comparator to simplify system monitoring. Plus, they can be used as performance upgrades for embedded ADCs.

Customers can speed time-to-market with compatible TI devices, including amplifiers (OPA333, INA333), references (REF33xx), temperature sensors (TMP102) digital isolators (ISO721), DACs (DAC7731, DAC856x) and ultralow-power MCUs (MSP430).

The ADS1115, ADS1114 and ADS1113 are available now. Pricing for the ADS1115 starts at $2.25 in quantities of 1,000 units. The ADS1114 starts at $2.00 and the ADS1113 starts at $1.85.

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