No. What is the current requirement?Will be MAX232 be good for this application?
Actually I will be powering 5 op-amps which consumes around 2mA each.No. What is the current requirement?
Only if you need an RS-232 connection. I mention the chip because it was among the first to generate the ± power supply voltages required by RS-232 interfaces from a +5VDC source. IIRC the original chp produce ±9VDC at a couple of tens of milliamps.Thanks for the replies.
This will be a portable device so using two batteries will not be best option for my project.
I will be requiring the negative voltage for an operational amplifier supply. Will be MAX232 be good for this application?
This chip will probably do what you need:Lets assume a 9V battery is used. I know methods that can be used to get -4.5V, ground and 4.5V, but is there a way to get -9V, ground and 9V?
Can't you use single-supply opamps?Actually I will be powering 5 op-amps which consumes around 2mA each.
For the supply I will most probably be using a 7.4V LiPo battery.
Why?Hi again,
My input signals will vary from -50mV to 50mV. If I buy an op-amp with a reference pin for offsetting, I will still need negative supply, no?
They are with reference to ground. I have the impression that if the input goes to negative, the op-amp supply has to have a negative supply. Am I wrong?Why?
What are these input signals referred to?
Many opamps are specifically designed to run from a single supply.Opamp needs positive as well as negative supply.
eg. 8 pin DIP 741 IC