Solutions Search - LTC2378-18 - 18-Bit, 1Msps, Low Power SAR ADC with 102dB SNR
LTspice: SAR ADC Driver Interface
Apr 3rd 2014
High-performance SAR ADCs can offer amazing dynamic range and linearity at faster and faster sample rates. But how do you design the amplifier and interface at the analog inputs? LTspice IV can help. This video shows how to use LTspice to simulate the analog input interface of high-performance SAR ADCs. We will look ...
Short Ground Leads Make Better Scope Photos
Nov 6th 2013
I often ask customers to send me oscilloscope photos showing the ADC interface timing of their circuits. Occasionally, what I get back is a waveform with large amplitude ringing or even something that resembles a sine wave for what should be a relatively clean square wave. When asked how the scope probe was grounded, they will ...
ADC Driving: Single-Ended To Differential Conversion
Sep 5th 2013
Figure 1 shows the LT6350 being used to convert a 0V to 5V single-ended input signal to differential for an ADC with differential inputs. In this case, the first amplifier is configured as a unity gain buffer and the single-ended input signal directly drives the high-impedance input of the amplifier. As shown in the FFT of Figure ...
Can a Slow, Precision Op Amp Drive a Fast 18-bit SAR ADC?
Mar 4th 2013
Many times the reference designs for high-speed high-resolution SAR ADCs show a relatively high-speed opamp in front of the ADC to drive it. There are good reasons for that: A low output impedance at high frequencies helps absorb the charge kick-back from the ADC’s sample capacitor, and the opamp’s high loop gain ...
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