Three Essential Classes of Differential Amplifiers

Created By: Hussein Nosair

Source: I’m perplexed. Why is the output voltage of my ADC differential amplifier driver not what it should be?

 

Class 1: High End Differential Amplifiers

This kind of amplifiers run at the highest frequencies in the magnitude of gigahertz.

Features:

1. Gigahertz bandwidths

2. Ten thousand volts-per-microsecond slew rates

3. VCM pin that adjusts input and output common mode voltage

4. Ultralow Distortion

5. Single-ended or Differential input drive capabilities.

Applications:

1. Broadband

2. IF communications

 

Class 2: Mid Size Differential Amplifier

This kind of amplifiers run in the hundreds of Megahertz range.

Features:

1. Hundred of Megahertz Bandwidths

2. Low distortion

3. Excellent DC performance

4. Output gain balance and phase matching

5. Suppressing EVEN order harmonics

6. High slew rate

7. Single-ended or Differential input drive capability

8. VOCM pin  that adjusts the output common mode voltage.

Applications:

1. Communications

2. instrumentation systems

 

Class 3: Low End size Differential Amplifier

This kind of amplifiers run in the tens of Megahertz range.

Features:

1. Tens of Megahertz Bandwidths

2. High input impedance

3. Low power

4. Low noise

5. Unbalanced differential outputs.

Applications:

1. Low power precision applications.