Selecting the correct op-amp

Question 1

What are the different types of op-amps and what are their properties?

Answer 1

General purpose
> Inexpensive
> Easy to use
> Limited performance

High speed
> High frequency
> High bandwidth

Precision
> Low offsets
> High CMRR

Low power
> Low standby power consumption

Low noise
> Optimised for small input signals

Question 2

What are the 3 types of op-a,[ technologies?

Answer 2

> JFET
Bipolar
CMOS

Question 3

What are the properties of a JFET op-amp?

Answer 3

> Supply voltages (Vdd – Vss)
> 5V to 35V
> Moderately low bias current
> Moderately low offset voltages
> Medium/High speed (better than CMOS)

Question 4

What are the properties of a Bipolar op-amp?

Answer 4

> Supply voltages (Vcc – Vee)
> 2V to 40V
> Extremely fast (slew rate)
> Low noise
> Low offset voltages
> Higher input currents
> Precise
> Thermally stable

Question 5

What are the properties of a CMOS op-amp?

Answer 5

> Supply voltages (Vdd – Vss)
> 1V to 15V
> Good for low-power/battery-powered equipment
> Very low bias currents
> Moderate offset voltages