Solutions Search - LTC6362 - Precision, Low Power Rail-to-Rail Input/Output Differential Op Amp/SAR ADC Driver
LTC2387 Drivers Part III: Trans-Impedance Amplifier/Driver
Sep 8th 2016
This is unabashedly a classic case of what marketing calls “a solution looking for a problem”. It is an example of how the full SNR of the LTC2387 may be realized for a real world signal. Most signals originating in low level circuitry, in sensors, or in the real world, will require significant gain to develop 8Vp-p ...
Baseband Design Example for LTC5589/LTC5599 Low-Power IQ Modulator
Jul 1st 2016
Introduction
This basic low power modulator was described in the LT Journal Nov 2015 article. In this blog post, we will show how to:
Use simulation to validate the filter design, and
Reduce DC offsets by utilizing Differential Amplifiers for the baseband drive.
Also shown are some miscellaneous tips to help complete ...
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 ...
Digital Gain Compression (DGC) for SAR ADCs
Mar 11th 2014
The LTC2378-20 offers a digital gain compression (DGC) feature which defines the full-scale input swing to be between 10% and 90% of the ±VREF analog input range. This feature allows the SAR ADC driver to be powered off of a single positive supply since each input swings between 0.5V and 4.5V as shown in the figure below.
Needing ...
Can You Use the Voltage Reference to Power Your ADC Driver?
Jul 11th 2013
Linear Technology’s family of 16-, 18-, and 20-Bit SAR ADCs (LTC2378-20 family) operates with an external reference voltage of up to 5V. The largest input voltage that you are then supposed to put on each ADC input pin is equal to that 5V reference voltage. It seems logical to use an opamp on a 5V supply with rail-to-rail ...
Offset Adjust for a Differential Op Amp Driving an ADC
Feb 4th 2013
Fully differential op amps are useful components to interface a single-ended signal to a differential-input ADC. For example, the LTC6362 is a low power differential opamp that is a good choice to drive 16- and 18-bit SAR ADCs such as the LTC2379-18 family. While both of these parts already have quite good DC accuracy in terms ...
Matched Resistor Networks for Precision Amplifier Applications
May 1st 2012
Introduction
Some ideal op amp configurations assume that the feedback resistors exhibit perfect matching. In practice, resistor non-idealities can affect various circuit parameters such as common mode rejection ratio (CMRR), harmonic distortion and stability. For instance, as shown in Figure 1, a single-ended amplifier configured ...
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