ADI targets industrial apps with zero-drift instrumentation amp

Norwood, Mass. — Analog Devices Inc. today introduced what it claims is the industry's first 16-V, zero-drift precision instrumentation amplifier (in-amp).

Designed for optimal performance in noisy industrial environments, the AD8230
features the industry's highest common mode input range, maintains low
drift, and delivers precise measurements over an extended temperature
range, according to ADI.

Until now, industrial process control design engineers could
only achieve this level of performance by adding resistors around
discrete zero-drift operational amplifiers, making it costly and
difficult to implement. The AD8230 is the industry's first zero-drift
in-amp to operate at 16 volts, providing designers of industrial
systems the benefits of an integrated, cost-effective in-amp solution
for instrumentation environments such as precision temperature and
bridge transducer interface applications where ground potentials vary
by several volts.

“Most 16-volt discrete solutions are not zero-drift and have common mode reject ratio (CMRR) limitations due to resistor matching and
tolerance challenges,” said Jay Cormier, product line director,
Advanced Linear Products, Analog Devices. “With the AD8230, designers
can achieve a 25% reduction in cost and a 50% reduction
in board area over most discrete solutions.”

In addition to its 16-V common mode input voltage range, which is 45% wider than the nearest competitor's offering, the AD8230 is
the only solution that maintains better than 50 nV/°C offset
drift over the automotive and extended industrial temperature range of
-40°C to +125°C. Competitors' in-amps have
significantly higher offset drift (nearly 50 times) above +85°C, ADI said. The AD8230's high CMRR of 110 dB (minimum) rejects line noise in
measurements where the sensor is far from the instrumentation or when
it exhibits dc offset change over temperature.

The AD8230 is versatile yet simple to use. Two matched external
resistors are required to program the gain, offering greater stability
over single resistor programmed instrumentation amplifiers. The AD8230
operates on ±4-V to ±8-V dual supplies, or +8-V to +16-V single
supplies, with input and output rail-to-rail capability.

The AD8230 is available now in 8-lead SOIC and is priced at $2.95 in
1,000-piece quantities.

Click here for the AD8230 data sheet.

For more information, readers can call 1-800-262-5643 or visit:

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