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36-volt bipolar-SiGe op-amps tout benchmark performance

Dallas&#8212Texas Instruments says its two new precision op-amps, the OPA211 and OPA827, combine ultra-low noise with lower power, smaller package size and higher bandwidth than competitive 36-volt amplifiers.

“The OPA211 and OPA827 represent a new class of precision amplifiers and demonstrate TI's commitment to the high-voltage industrial market,” said Art George, senior vice president of the high-performance analog business. “These new amplifiers deliver extremely high accuracy with significant improvements in power consumption, bandwidth and package size characteristics, which will enable next-generation performance in industrial applications.” As such, the company touts the op-amps, the first developed using the company's BiCom3HV complementary bipolar 36-volt silicon germanium (SiGe) process, as breakthrough performers for test and measurement, instrumentation, imaging, medical, audio and process control applications.

The OPA211 is a bipolar-input operational amplifier (low source input, low offset voltage) that achieves 1.1 nV/rtHz voltage noise and 80 MHz gain bandwidth product (GBW) with a supply current of just 3.6 mA. The device provides an offset of 100 microvolts, 0.2 microvolt/&degC offset voltage drift and less than 1 microsecond settling time for driving precision analog-to-digital converters in data acquisition systems. It also offers rail-to-rail output swing.

The OPA211 operates over a &plusmn2.25 to &plusmn18-volt supply range and is available in MSOP-8 or DFN-8 packages. Its 3-by-3 mm DFN package requires about one-third the area of a standard SO-8 package.

The OPA827 is a JFET-input operational amplifier (high source impedance, low bias current) that combines high DC precision and AC performance. DC characteristics include 4.5 nV/rtHz voltage noise, 250 microvolt offset voltage, 1 microvolt/&degC offset voltage drift and 400 nV p-p frequency noise. AC specifications include 18 MHz GBW, 22 V/microsecond slew rate and 0.0004 percent total harmonic distortion (THD) at 1 kHz.

The OPA827 operates over a &plusmn4 to
&plusmn18-volt supply range with a supply current of just 4.5 mA. The MSOP-8 package represents a 50 percent reduction compared to SO-8 packages.

Click here and here for the product datasheets. The OPA211 is sampling now, with volume production scheduled for 2Q 2007. The device is available in DFN-8, MSOP-8 and SO-8 packages and is priced at $3.45 in 1,000-piece quantities (suggested resale pricing). The OPA827, also sampling now and with volume production scheduled for 2Q 2007, is available in MSOP-8 and SO-8 packages and is priced at $5.75 each in 1,000-piece quantities (suggested resale pricing).

Texas Instruments , 1-800-477-8924, www.ti.com

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