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Electrical equipment and electronic components

High precision fixed-gain fully differential amplifiers/ADC drivers with low power

By Analog Devices incorporates Linear Technology on 14th August 2018

Product Details Supplier Info More products

LTC6363-1 and LTC6363-2 Precision, Fixed-Gain, Fully Differential Amplifiers, creating a family of ultra-precision fixed-gain variants of the successful LTC6363 amplifier. The new offerings are available in fixed gains of 0.5, 1 and 2V/V which provide flexibility when scaling inputs to the full range of ADCs.

The precision resistors, which are integrated in LTC6363-0.5, LTC6363-1 and LTC6363-2, have been designed with overall system performance in mind, striking a balance between noise and linearity, and utilizing laser trimmed factory calibration to achieve a level of precision which is difficult and costly to achieve discretely. Initial gain accuracy is 45ppm maximum and varies by only 0.5ppm/^oC maximum over temperature. Common mode rejection ratio, which is typically limited by discrete resistor matching, is an outstanding 94dB minimum, equivalent to a 0.002% resistor matching.

“One of the challenges when driving high-performance SAR ADCs is finding an appropriate driver that consumes comparable power while maintaining the noise and linearity performance of the ADC. This is where the LTC6363 family excels. For example, the LTC2378-20 20-bit SAR ADC consumes 21mW at 1Msps,” says Maziar Tavakoli, Design Manager, Linear Products and Solutions. “The LTC6363 family’s noise and linearity have negligible impact on ADC performance while consuming a mere 19mW, comparable to the ADC’s power consumption. Now with the LTC6363-0.5, LTC6363-1 and LTC6363-2 you can get this same ADC driving performance plus the added precision afforded by the precision integrated resistors, all in the same compact MSOP8 package.”

The entire LTC6363 family operates with supply voltages from 2.8V (±1.4V) to 11V (±5.5V) while drawing 1.75mA typical supply current. The devices are specified for operation over a temperature range from –40°C to 125°C. The LTC6363 fixed-gain series are available in a 3mm x 5mm plastic MSOP8 package, and the LTC6363 (without resistors) is also offered in the tiny 2mm x 3mm DFN package. For more information, visit http://www.analog.com/LTC6363.

Analog Devices

Analog Devices, Inc. operates at the centre of the modern digital economy, converting real-world phenomena into actionable insight with its comprehensive suite of analogue and mixed signal, power management, radio frequency (RF), and digital and sensor technologies. ADI serves 125,000 customers worldwide with more than 75,000 products in the industrial, communications, automotive, and consumer markets. ADI is headquartered in Wilmington, MA, USA.

Visit our website 01932 358530

Analog Devices, Inc. operates at the centre of the modern digital economy, converting real-world phenomena into actionable insight with its comprehensive suite of analogue and mixed signal, power management, radio frequency (RF), and digital and sensor technologies. ADI serves 125,000 customers worldwide with more than 75,000 products in the industrial, communications, automotive, and consumer markets. ADI is headquartered in Wilmington, MA, USA. Visit http://www.analog.com.

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