View Full Version : Op Amp Required

11-27-2009, 06:05 PM
Can any one suggest me an Op Amp with following configuration which is easily available in India (Mumbai)

*Rail to Rail In/Out
*Low Power and Low Voltage (3.3v)
*Single supply
*Gain Bandwidth product arround 1MHz
*4 Opamps in a Package
*SMT package (SOIC)

I would be really helpful for the help! Thanks!

11-27-2009, 06:22 PM
the LMP7715 from national meets all your requirements

the follwing are its characterstics
Input offset voltage

150 μV (max)

Input bias current

100 fA

Input voltage noise

5.8 nV/ √Hz

Gain bandwidth product

17 MHz

Supply current (LMP7715)

1.15 mA

Supply current (LMP7716/LMP7716Q)

1.30 mA

Supply voltage range

1.8V to 5.5V

THD+N @ f = 1 kHz


Operating temperature range

−40C to 125C

Rail-to-rail output swing

Space saving SOT-23 package (LMP7715)

8-Pin MSOP package (LMP7716/LMP7716Q)

look at this link http://www.national.com/pf/LM/LMP7715.html#Overview

meets all your req.

11-27-2009, 06:52 PM

Is it easily available ??? :D

11-28-2009, 09:47 AM
Try for one of the MCP series from Microchip... MCP604, f.e. I have MCP6284 but in DIP. Available at the usual Lamington Road shops.

11-28-2009, 10:08 AM

Thanks ! :D

11-28-2009, 01:07 PM
Avinash, are you shifting to Audio from controllers?

What's cooking up?

11-28-2009, 01:32 PM

You are partially right. Basically at the moment I am up to

*Microphone Interface with uC. Need OpAmp to amplify the signal. Basically recording IC to data flash and SD cards

*Accelerometers Interface to uC. Op Amps used as unity followers (buffer) between uC and Accelerometer.

Op Amps can't be avoided !