Analog Devices Inc. (Wilmington, MA) introduced its AD8221 instrumentation amplifier, which provides the highest common-mode rejection (CMR) over frequency of any instrumentation amplifier available in an MSOP package, which is half the size of a traditional SOIC package, according to the company. The AD8221 is suitable for applications requiring multiple high-performance channels in a limited amount of space such as medical, industrial, and instrumentation and data-acquisition applications.
The AD8221 provides breakthrough performance of 90dB to 10kHz. Also, the CMR of the device improves as the gain increases. The high CMR holds system errors to a minimum by rejecting common-mode voltage noise (to 10kHz and beyond) from sources, including motors, repair equipment, switching power supplies and high-frequency medical equipment. The AD8221 also features low
input offset voltage of 100µV, low input offset voltage drift of 0.8µV/°C, low gain drift of 10ppm/°C at G=1, and low noise of 7 nanovolts per rt-Hz RTI noise at 1kHz. The
AD8221 operates at a quiescent current of 1mA over a resistor-programmable gain range of 1 to 1,000.
The AD8221 is sampling now in an eight-pin MSOP package, is specified over the standard industrial temperature range of -40°C to +85°C, and is priced at $2.25 per unit in 1,000-piece quantities.
