I want to use ada4938-1 to drive the ADC ad9629, before we start the design, I do the simulation of ada4938-1, but I met some problems when I do the simulation.
software: Orcad PSpice
the steps of simulation:
First , I get…
I would like to ask if it is possible to use Cf - capacitors parallel to Rf - resistors in feedback like with AD8138 (Figure 42. Circuit Definitions in datasheet) with this differential amplifier (ADA4938-1)? Will be it stable? I want to use it like…
We are reevaluating the use of the ADA4938. The CMRR is specified to be TYP: -75dB @ ∆VIN, cm = ±1 V, f = 1 MHz.
The CMRR measured on an Eval Board with ADA4938 reveals, that the CMRR is strongly frequency dependent. (red curve: ADA4938, blue: ADA4932…
I intend to multiplex the outputs of two ADA4938-1 devices into an ADC type LTC2387-18; I want to confirm this is possible using the Power-Down feature or I have to include a dedicated multiplexer.
Thanks for your comments. I have one more query on ADA4938.
I have configured the ADA4938 in Differential to single-ended and single-ended to differential configuration and observed the noise floor. I have used the ADA938 evaluation board from…
I use the ADA4938 to Drive the ADC(AD9629), the pin Vocm connected to pin VCM of AD9629, and the output voltage of pin VCM is MID AVDD Supply (0.9V).
The schematic is shown below, and the gain of ADA4938 should be 0.5 in theory.