Hi,
Sorry for the delay.
The 1.2-dB gain error between the two channels seems high but it can be possible. Typical gain matching spec (for most devices) as per the datasheet is within +/-0.8-dB.
Can you switch out the device in that location with a…
Hi Ashith,
How about this network?
R1 is source resistance which I have matched on the board with R4. If your source resistance is different, then change R4 accordingly.
R3 and C3 are device's internal impedance.
Frequency response from VG1 to VF1…
Part Number: VCA2617 Other Parts Discussed in Thread: VCA5807 Hi all,
I would like to use the VCA2617 for a new design. I'll use it as a postamplifier to the VCA5807. In the data sheet there are two PINs (PIN 3 and PIN 6) labelled VDDR and GNDR related…
Amy: thank you for sending me an updated VCA2617 test bench by email. This has fixed the problem of amplifier outputs going negative with a positive-only supply. However, it still does not address our main concern, which is to establish the power-up time…
Other Parts Discussed in Thread: VCA2617 I'm looking at using VCA2617 in a new design, I see its an active part but given the age of the device I'm worried about its longevity. Anyone got any comments??
Part Number: TLV5619 Other Parts Discussed in Thread: VCA2617 , DAC8831 Hello,
Is the TINA TI Spice model available for this DAC?
We wanted to use this DAC(TLV5619) along with the VGA(VCA2617) in our design. The SPICE model is available for the latter…
Hello,
I agree LMH6401 would be overkill for your frequency range. Additional f ully differential PGA/VGAs to look at for your gain range:
1. VCA2617: −10dB to 38dB, or −16dB to 32dB; dual channel fully differential VGA, 50MHz, + 5.25 (+/-2…
Hi Pierre,
How are you?
Yes, you are right.
You can add the differential filter between VCA2617 VCA's outputs and your next device's inputs.
Then you can improve the VCA2617's SNR performance for your application.
Thank you!
Happy New Year…
Hi csmyth,
Glad to hear that. Acutally we are trying to build our receiving chain by cacecading the VCA2615, VCA2617 and AFE5801, since we might need a quite large gain range.
I am now simulating the behaviors of VCA2615 and VCA2617 using TINA. I was…