Low-noise op amps improve signal conditioning in harsh industrial apps

SUNNYVALE, USA: Maxim Integrated Products has introduced the MAX9632/MAX9633 36V, low-noise, precision operational amplifiers with low distortion.

The first devices in Maxim's new line of high-voltage, precision op amps, the MAX9632/MAX9633 are designed using a proprietary high-speed complementary BiCMOS process (CB5HV). This high-voltage analog process is optimized for excellent AC dynamic performance, ultra-low noise, wide operating voltage range, and low-drift signal conditioning. The MAX9632/MAX9633 target industrial data-acquisition applications that require precision signal conditioning at low frequencies.

The MAX9632 is a single op amp with an ultra-low input-voltage noise density of 0.94nV/rt-Hz, a low offset of 125microvolts (max), and an offset temperature coefficient of 0.5microvolts/ degree Celsius (max). The MAX9633 is a dual op amp with an input-voltage noise density of 3nV/rt-Hz, an offset of 200microvolts (max), and an offset temperature coefficient of 0.9microvolts/degree Celsius (max).

Both devices provide high-fidelity signal conditioning with THD specifications better than -136dB, enabling use in professional audio equipment and high-end test and instrumentation applications. Gain-bandwidth product (GBWP) is typically 55MHz for the MAX9632 and 27MHz for the MAX9633.

This usable bandwidth, combined with a generous 4.5V to 36V operating voltage range and a typical current consumption of 3.9mA (MAX9632), allows the devices to be used in an array of high-performance industrial applications. Both devices offer a new level of robustness, with up to ±8kV Human Body Model ESD rating (MAX9632).

The MAX9632/MAX9633 are fully specified for operation over the -40 degrees Celsius to +125 degrees Celsius automotive temperature range. The products are available in a small (3mm x 3mm), lead-free, 8-pin TDFN package and an 8-pin SO package (MAX9632 only). Prices start at $3.39 for the MAX9632 and $2.39 for the MAX9633 (1000-up, FOB USA).