Recommendation for op-amp?

[chihwt2003]

Hi all,

Can anyone please give some suggestion on what type of opamp is suitable to be build following these specifications:

1) VCC=3 to 5V
2) Rail to rail input and output stage. D-range is about VCC-0.4V for input and output.
3) THD < 0.1% for 20Hz, 1kHZ and 25kHz.
4.) GBW > 1MHz
5.) Open loop gain , 50~80dB

Thx.

Regards,
CW

 

[techie]

Try microchip MCP601

 

[newanalog]

read some paper writen by huijsing

 

[simon110]

telescopic gain boosted op amp is a good choice, you can read some book such as analysis and design of analog integrated circuit 4th edition P.R.Gray, in additon, some final reports of EECS 240 are practical

 

[ferrite]

Try microchip MCP601

i think he is talking about how to design such a chip, what config to use, etc.

 

[vbhupendra]

FC opamp with p-input stage

 

[avinash]

just go for complimentary input folded cascode opamp.study material and design constraints could be seen from the book by li,baker,boyce.

 

[newcpu]

Search some documents from IEEE. There maybe some helpful papers.

 

[nagula suresh]

u can try for two stage opamp,which will give high gain.,
and the gbw is less than 1mhz is easily achievable.

 

[beckchm]

huijsing has the classical paper about rail configuration