12-bit ADC has internal reference

Analog Devices has introduced the first product in a series of ultra-low-power, 12-bit, 1MSPS SAR (successive approximation register) A/D converters with an internal 2.5V reference.

The AD7091R allows industrial and medical equipment designers to optimise operating and static power budgets and is designed for USB-powered or battery-powered data acquisition modules, handheld meters, field instruments, energy harvesting applications and devices such as portable electrocardiograms and heart rate monitors.

“The AD7091R operates at over 3.5 times the power efficiency of competing A/D converters, and of discrete ADC and reference two-chip alternatives,” said Mike Britchfield, vice president, Industrial and Instrumentation Group, Analog Devices. “The significant power performance advantage was designed specifically for system engineers working within stringent system power constraints.”

The AD7091R core draws 349 microamps typical at 3-V when operating at 1MSPS. The device’s power automatically scales with throughput. It draws 264-nA power down current and 21.6-microamps standby current, which allows designers to further optimise energy consumption for intermittent or one-shot conversions. The new device also achieves a 4.5 ppm/degree C reference temperature coefficient.

The EVAL-AD7091RSDZ evaluation board for the AD7091R is now available and priced at $59.00. The EVAL-SDP-CB1Z controller board must be ordered with the evaluation board and is priced at $99.00.

This article first appeared on EE Times Europe.

Related links and articles:

www.analog.com

Webinar on unexpected error sources

News articles:

ADI’s Fishman remains bullish despite economic uncertainty

ADI, TSMC develop 180-nm precision analog process

Analog Devices buys clock technology specialist