Thumbs up! The industry's first zero-drift, zero-crossover op amp achieves ultra-high input linearity and accuracy
TI continues to set the standard for precision amplifiers with the introduction of the first operational amplifier (opamp) featuring zero-drift and zero-crossover technology. The OPA388 op amp maintains high accuracy over the entire input range and is suitable for a variety of industrial applications, including test and measurement, medical and safety equipment, and high-resolution data acquisition systems.
The unique structure of the OPA388 achieves an industry-leading combination of ultra-high input linearity and accuracy. TI's Zero-Drift Technology eliminates temperature drift and flicker noise for the highest DC accuracy and dynamic error correction, while its Zero-Crossover Topology eliminates offset errors caused by common-mode limiting, resulting in linear output and true rail-to-rail input operation.
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True precision with ultra-high input linearity: The device's zero-crossover topology eliminates the input offset transition region of traditional complementary metal-oxide semiconductor (CMOS) op amps, ensuring maximum linearity and minimum distortion over the entire common-mode input range.
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Provides high DC precision: TI's zero-drift technology provides maximum offset voltage as low as 5 μV, typical offset voltage drift of 0.005 μV/°C and maximum input bias current of 700 pA over the industrial temperature range of -40°C to 125°C. It eliminates the need for costly thermal calibration while increasing DC precision.
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Supports wide bandwidth operation: With a 10 MHz gain bandwidth product (GBW), the OPA388 can be configured for high gain and can acquire a wide range of signal types and frequencies. From precision weigh scales to heart rate monitors, the OPA388 supports these devices.
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Maintaining high performance with low distortion: Ultra-low total harmonic distortion of -132dBc and voltage noise of 7nV/√Hz help create high-resolution signal chains for specialized applications such as programmable logic controllers, precision field transmitters, and motion control equipment.
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Reduced complexity and cost: Zero-drift and zero-crossover techniques are used to reduce signal chain complexity and external component count, allowing designers to minimize board space and bill of materials (BOM) costs.
TI offers a range of support tools for designers using the OPA388, including a reference design that demonstrates how to use precision op amps to eliminate crossover nonlinearities in digital-to-analog converters . The reference design uses the DAC8830 precision data converter and the REF5050 voltage reference to create an accurate DC calibration system for high-precision applications in wireless infrastructure and test and measurement.
The OPA388 is available now in a 4.9-mm-by-3.9-mm small outline integrated circuit (SOIC) package through
the TI store
and authorized distributors.
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