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Op amps aid analogue to digital converter accuracy

27th October 2020
Mick Elliott

The LTC6228 and LTC6229 low-distortion 730 MHz operational amplifiers from Analog Devices are in stock at Mouser Electronics.

Offering low noise rail-to-rail output at very high speeds, the LTC6228 single and LTC6229 dual op amps support the analogue-to-digital converter accuracy necessary for applications including test and measurement, optical electronics, medical imaging, and data acquisition.

The op amps offer ultra-low 0.88 nV/√Hz voltage noise and low distortion performance of better than -100dB at 4 VP-P for large signals as fast as 2 MHz.

These performance metrics enable high dynamic range applications.

Both op amps operate from a single supply of 2.8 V to 11.75 V and can support ±5 V (or other lower split supply) while maintaining excellent performance at high frequency and slew rates of 500 V/µs.

The input can ground sense, while the outputs swing rail-to-rail.

The LTC6229 is offered in a tiny 3 mm × 3 mm DFN package, while the LTC6228 is offered in a 2 mm × 2 mm DFN package.

Both op amps offer a wide operating temperature range of minus 40 degrees Celsius to 125 degrees Celsius and are designed for white goods, optical electronics, instrumentation, and high-density systems.

The LTC6228 and LTC6229 op amps are designed to drive the LTC2387-18 18-bit successive-approximation-register (SAR) analog-to-digital converter (ADC) for high-speed data acquisition and imaging applications. The LTC2387-18 ADC offers excellent linearity and wide dynamic range, with very low distortion at high input frequencies.

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