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.”
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.
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.
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