Author - Brian Harrington

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Brian Harrington	Write for Electronic Design
Brian Harrington is a field applications engineer with Analog Devices Inc., Wilmington, Mass. He received a BSEE from the University of Lowell, Mass. Email address: brian.harrington@analog.com
1 results found for Brian Harrington, displaying items 1 - 1

July 21, 2005 [Ideas For Design]
FET-Input Instrumentation Amp Maintains 90-dB CMRR To 1 MHz
Figure 1 shows a benign means of interfacing a low-level, wideband differential signal to an analog-to-digital converter (ADC). The FET input stage (AD8066) draws only 6 pA of input bias current and presents only 2 pF of differential input capacitance. The overall circuit has an input referred noise of 10 nV/√Hz and a gain-bandwidth product (GBP) of 2 GHz. It maintains a common-mode rejection ratio (CMRR) of over 90 dB up to 1 MHz, far...