TS358

Single Supply Dual Operational Amplifiers

4/8

Version: A09

Application Description

The TS358 made using two internally compensated, two-stage operational amplifiers. The first stage performs not only

the first stage gain function but also performs the level shifting and transconductance reduction functions. By reducing

the transconductance, a smaller compensation capacitor (only 5.0pF) can be employed, thus saving chip area. Another

feature of this input stage is that the input common mode range can include the negative supply or ground, in single

supply operation, without saturating either the input devices or the differential to single-ended converter. The second

stage consists of a standard current source load amplifier stage.

Each amplifier is biased from an internal-voltage regulator, and which has a low temperature coefficient thus giving

each amplifier good temperature characteristics as well as excellent power supply rejection.

Figure 7. Voltage Reference

Figure 8. Wien Bridge Oscillator

Figure 9. Bi-Quad Filter