Other Parts Discussed in Thread: OPA857-DIE, OPA657-DIE, OPA2607, PSPICE-FOR-TI, TINA-TI
Hi,
Is there an opamp that cannot source/sink more than 40mA with 3.3V+-5% power supply and small size preferably 2 or 4 circuits in a WLCSP package?
Thanks
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi,
Is there an opamp that cannot source/sink more than 40mA with 3.3V+-5% power supply and small size preferably 2 or 4 circuits in a WLCSP package?
Thanks
Hi Minglai, We have six amplifiers available in DIE form: OPA857-DIE, OPA656-DIE, OPA657-DIE,OPA846-DIE, THS3001-DIE, and OPA2835-DIE.
The OPA2835-DIE is a dual amplifier, with Iout= 40mA max, and supports a Vs=3.3V.
What is the end application? Specifically, why is the chip package desired and what is the bandwidth you are targeting? Are you sure a normal QFN package is insufficient?
Hi Sean,
This is for optical communication transceiver. The space is very limited and there is a few devices needed. Therefore, I would like to use as small package as possible.
Thanks
The smallest dual amplifier package we have is OPA2607, which is offered as a X2QFN.
The typical Output Short-circuit current from the datasheet is 60mA but I don't know the minimum sink and source currents. Thanks
Hi Minglai, the minimum output current is of course 0mA. 60mA is the maximum that will cause the output voltage to droop to zero. The max/min output voltage vs output source/sink current is shown in figure 7-31. I would avoid using very much output current since the device is so small, and will quickly heat up for a modest load current.
Sean,
One question though, is it a typo or is it that I missed something, the condition for this test has RL=10K, with this load, how can the current be as shown in the chart?
By the way, is there a simulator that I can use to check my circuits that use TI linear parts?
Thanks.
The condition for this test is variable RL. Yes, you can download TINA-TI or PSPICE-for-TI to simulate this behavior. I made the model for the OPAX607.