4 Pieces | TI RC4558P RC4558 Dual Operational Amplifier DIP-8 | FAST US Ship

How to use RC4558?

The operation of this IC is explained through a voltage controlled oscillator circuit which is given below. The voltage-controlled oscillator can be designed through two op-amps. Instead of using two op-amps, you can use the RC4558 IC. The voltage to be controlled is applied at the input pin2. Due to the network of a voltage divider connected between pins2 and 3, half of this voltage is applied at pin3.

Voltage Controlled Oscillator Example Circuit

The op-amp A will generate a triangular waveform on powering the IC. The current will flow from the 100k resistor and then discharges the 0.05µF capacitor resulting in a triangular wave at its output. This output is connected to the input pin of the op-amp B through a 51kΩ resistor. The op-amp works B as a Schmitt trigger. It monitors the input voltage.  When the input voltage is above the threshold level, then it will send a HIGH signal at output and if the input voltage falls below the threshold level, the output will become zero. In this way, a square wave is produced at the output.

1 Features

• Continuous Short-Circuit Protection
• Wide Common-Mode and Differential Voltage Ranges
• No Frequency Compensation Required
• Low Power Consumption
• No Latch-Up
• Unity-Gain Bandwidth: 3 MHz Typ
• Gain and Phase Match Between Amplifiers
• Low Noise: 8 nV/√Hz Typ at 1 kHz

2 Applications

• DVD Recorders and Players
• Pro Audio Mixers

3 Description

The RC4558 device is a dual general-purpose operational amplifier, with each half electrically similar to the μA741, except that offset null capability is not provided.

The high common-mode input voltage range and the absence of latch-up make this amplifier ideal for voltage-follower applications. The device is short-circuit protected, and the internal frequency compensation ensures stability without external components.

1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Revision History

Changes from F Revision (September 2010) to G Revision

• Added Applications, Device Information table, Handling Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section.Go
• Removed Ordering Information table.Go

5 Pin Configuration and Functions