Part Number: OPA1644 Hi
We 're facing a problemewith the following design
The 2 OPA1644 fails and when analysing their 15 V PWR supply is nearly ins CC (the PS fails)
Whe think that the problem comes from that it" possible tue conected card to…
Gabor,
I am not sure what causes the error in Altium but some simulators do not recognize the initial state condition (IC=).
I removed all such statements from the netlist - please try to re-run your simulation using the attached netlist.
…
Hi Jelly,
Many AC-specs of OPA1604 and OPA1644 are specified in 4.5 - 36V (+/-2.25 - +/-18V) supply condition, but distortion spec such as THD+N and IMD are specified in 3Vrms=8.48Vpp output case.
Therefore, we have to consider the risk of some degradation…
Problem solved! Turns out that TPA3255 circuit is doing it´s job. The noise is coming from the OPA1644 filter circuit. I will have to focus on this issue.
Thanks anyway!
Morozov,
OPA1644 is a superior device. Almost all quad op amp have the same pinout so many op amps including OPA1644 will drop in with no other changes.
The only noticeable difference between TL084C and OPA1644 usage is input common mode range.
…
Sean
This is still in development and no samples are available yet.
In the meantime have you looked at the OPA1644? It can't match the low power specs of the OPA169x, but is a very good 4 channel audio opamp and comes in the TSSOP-14 package.
…
Part Number: TL084H Other Parts Discussed in Thread: OPA820 , OPA810 , MUX508 , , OPA1644 , OPA4141 , OPA2145 Hi,
I'm asking myself if there are J-FETs in the Input stage (for true MUX Friendly operation) or MOS transistors with some kind of gate protection…
Hi Brian,
I cannot help you with a better Spice Model of TL074.
If doing simulations is of crucial importance for the customer, I would recommend to use the OPA1644. It's well known as heavily improved version of the TL074 and is available at a reasonable…
