4 Pieces | JRC4558D 4558 | Dual Operational Amplifier DIP-8 | FAST US Ship

The legendary JRC4558D. You’ve seen them in Tube Screamers and a million other audio devices.

How to use JRC4558D?

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 JRC4558D 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.