Skip to main content

Questions tagged [icl7660]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
4 votes
3 answers
474 views

Issues with ICL7660 ICs from eBay - Overheating and Failure

I recently purchased several cheap ICL7660 ICs from eBay to use in an OpAmp circuit. Unfortunately, I've encountered issues with these components, specifically overheating and subsequent failure. Here ...
Special.Guest's user avatar
0 votes
2 answers
279 views

Why use a different circuit to create a positive voltage with the ICL7660, rather than running it “upside-down”?

The primary use of the ICL7660 (and it’s many clones/alternatives) is to create a “negative voltage” equal to its input voltage, which it does with minimal external components. However, in my ...
Harry Brooke's user avatar
1 vote
2 answers
1k views

Charge Pump 9v to 15v?

I need to power a device (it's an analog bucket brigade delay) from a 9v power supply or battery. The device takes 15v. Is there anyway? I have a few 7660s IC chips, if that helps. I've made charge ...
TCassa's user avatar
  • 664
3 votes
1 answer
9k views

Negative voltage PWM?

I'm relatively new to EE, sorry if this is newbie territory. With an Arduino, I am trying to emulate a device that outputs NEGATIVE 3.3v PWM (0V or -3.3V, square wave) at around 500 hz. Obviously,...
DrJustice's user avatar
1 vote
2 answers
943 views

Package impact on ICL7660

I am using the ICL7660 charge pump IC to generate a -5V supply from a +5V. When using the IC on breadboard with a DIP package (ICL7660CPAZ), with two 10µF electrolytic capacitors, it works perfectly ...
Edesign's user avatar
  • 448
0 votes
2 answers
3k views

Dual power supply for Op Amp

We have dual power supply units (+- 12V DC with common GND) at our college lab using which I am able to implement my project (digital thermometer) which uses op amps as shown in the figure. I'm using ...
Navin Sridhar's user avatar
2 votes
2 answers
2k views

Can I use MAX232 instead of a ICL7660 to make a split power supply?

For an opAmp rails I need positive and negative voltages i.e. Vcc, Vee. I look for a good IC which is commonly used for creating split power from a single power supply. Many recommends ICL7660. I ...
user16307's user avatar
  • 12.2k