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Fully differential amplifier drives 18-bit ADCs while consuming 5-mW
May 03, 2012 // Paul Buckley
Linear Technology has released a low power fully differential amplifier that can drive high precision 16- and 18-bit SAR ADCs at only 1 mA supply current.
With 200 µV max input offset voltage and 3.9 nV/√Hz input-referred noise, it is well suited for precision industrial and data acquisition applications.
The LTC6362 has an output common-mode pin with a 0.5 V to 4.5 V range, and 18-bit settling time of 550 ns with an 8 V P-P output step, making it ideal for driving ADCs such as the LTC2379-18 in multiplexed input and control loop applications. This 18-bit SAR ADC features digital gain compression, which sets its full scale input range to 10% to 90% of the reference voltage. Together with the rail-to-rail output stage of the LTC6362, this feature eliminates the need for a negative supply rail, simplifying the circuit and minimizing power consumption.
The flexible architecture of the LTC6362 can convert single-ended DC-coupled, ground-referenced signals to differential, or DC level shift differential input signals. The low input bias current, low offset voltage and rail-to-rail inputs of the LTC6362 also enable its use in a high-impedance configuration to interface directly to sensors early in the signal chain.
Availability and Pricing
The LTC6362 is available in MSOP-8 and 3 mm x 3 mm DFN packages, with fully guaranteed specifications over the 0 to 70°C, -40 to 85°C and -40 to 125°C temperature ranges. Prices start at $1.59 each in 1,000-piece quantities.
More information about the LTC6362 differential amplifier at www.linear.com/product/LTC6362
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Technology News
Floating surge stopper provides unlimited overvoltage protection
May 17, 2013
Protecting sensitive electronic circuitry from voltage transients is an essential part of any system be it automotive, industrial, ...
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Technology News
Altera to integrate Enpirion power interfaces into its FPGAs
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Feature Articles
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Business News
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Technical papers
Filter Wizard
Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
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The development platform for i.MX 6Quad from element14 (built to the Freescale SABRE Lite design) is an evaluation platform featuring the powerful i.MX 6Q, a multimedia application processor with Quad ARM Cortex-A9 cores at 1.2 GHz from Freescale Semiconductor.
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December 15, 2011 | Texas instruments | 222901974
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