Other Parts Discussed in Thread: TLV333 , ADS1220 , LMC7660 , TLV2333 , TL7660 Hi
I am planning to use a charge pump in order to provide a negative rail from a +2.5V source. I found TI's LMC7660IMX/NOPB to be suitable for the job, but I went through…
Abdullah,
In my calculation, I used your load current as the supply current by mistake. When I use the maximum supply current for LMC7660 which is 400uA (found in datasheet in EC table on page 2), I get a ripple voltage of 160uV which is far less than…
Other Parts Discussed in Thread: LMC7660 , LM2660 Hi
I am using IC LM2660 and LMC7660 separately in my different project to get -5V providing +5V Input
As per Datasheet, it is indicated to use Electrolytic Capacitors in circuit
For my design I have…
Other Parts Discussed in Thread: LMC7660 Hi,
Could you please provide me with a Eagle library containing LMC7660 Switched Capacitor Voltage Convertor (DIP package). Thanks in advance!
Anurag
Hello Brigitte
Thank you for answer.
Since it does not respond to 20MHz load, is it correct that it is possible by adding enough output capacitors?
Is there anything I need to look at carefully in the datasheet?
In addition, I would like to…
Hi Thomas
I added the 100 nf ceramic capacitors as you suggested and still no improvement was observed. You can find the picture of the setup I am studying right now. It consists of a LMC7660 voltage regulator in order generate the negative supply and…
Hi Alex,
Could you recommend a set-up based on this information?
Since you have on the board are 24, 12, 5, 3.3VDC power rails, I would recommend to create a negative -5V supply rail from switched-capacitor voltage inverter, such as LM2776 , LM27761…
Hi Rosario,
The UAF42 uses dual supply operational amplifiers internally is intended for use with a single supply source. Therefore, in a single-supply system the negative supply(presumably) would have to be generated by a dc-to-dc converter.
A buck…
Hello Collin,
thanks. That are all good thoughts. I need a while to think about these solutions. but you open options. Thanks therefor. So, now is weekend. I whish you a nice one.
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