I have a confusing problem with ADA4938-2. I connected ADA with unity gain and dual supply to AD9253. Vocm is provided by ADC. Schematic and parts values seem to be correct but output of ADA is very noisy. Any suggestion??
Is there any difference between the part numbers ADA4938-1ACPZ-R7 and ADA4938-1ACPZ-R2 other than the sample ordering quantity?
i am confused about the common mode voltage setting of ADA4938 differential OpAmp. As mentioned in the datasheet we would like to set the output common mode voltage via OCM input and an external resistor devider. The OpAmp has dual supply (+/…
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…
I am trying to use ADA4938 as a differential driver for transferring signal from board to board (DC coupling through SMA cable). I am wondering what is the output impedance of ADA4938 when it's configured as a DC coupled differential driver? And…
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…
2、ADA4938的输出电压与电源电压有关，单电源的情况下，因此单端输出电压范围最大为1.2V~1.4V（共模电压1.3V），如果采用双电源供电， 输出电压范围为 -VS+1.2V ~ Vs-1.2V