First off, my list is of dual op amps, because in virtually every design, there is a requirement or an opportunity for two or more, and if there's a spare, there is some other function that can be enhanced by using it, typically as a buffer or a filter. Besides, two in the space of one is almost free.
A good op amp for me is one that has enough speed for my typical application and still maintains high DC accuracy. It is also a bonus if a DIP option is available.
Very general guidelines for applications from DC to 1 MHz.
The favorites meet or beat all of these requirements, and have been used successfully in production designs.
GBW > 1MHz and < 100MHz
unity-gain stable
SR > 5V/us
Ibias < 1 nA
Voffset < 0.5mV
Max Supply >= 10V
Standard pinouts
Rail-to-rail operation
.
.
.
AD823
AD8676*
LT1498
LT1804
LT6244HV
LMC6482**
*no DIP
**lowest BW, but CMOS makes it very low current and I_bias
To directly replace an LM741 or similar, almost any general purpose op amp is better with regard to performance, e.g. bandwidth, slew rate, bias current and offset voltage. Here are some common and inexpensive good choices. Note that like the '741, these are not rail-to-rail, and are therefore less suitable for lower voltage applications due to more limited headroom.
TL081 (TL082 and TL084 dual and quad)
TL071/2/4 (similar to the '081)
LMC6081 (R-to-R)
No comments:
Post a Comment