RC4558 Operational Amplifier: Datasheet, Replacement and Pinout

The RC4558 is a dual package version of the commonly used LM741 Op-Amp, with each half electrically similar to the LM741 except for that there is no offset and null option in the RC4558 Op-Amp.  It has a high common mode Input voltage of ±14V hence the inverting and non-inverting pins can be driven upto this voltage provided they are less than the operating voltage.

The high common-mode input voltage range and the absence of latch-up make this amplifier ideal for voltage-follower applications. It also has internal frequency compensation and short circuit protection in-built which ensures stability without external components.  

Hence requires minimum number of components to be application ready.   Because of these characteristics these ICs are commonly found inside DVD players and Guitar amplifiers. You can also find some Geiger counter circuits and Audio amplifier or comparator circuits based on this IC. Also since the IC has same properties as LM741 all the circuits with LM741 can be replaced with a RC4558.

Be advised that the 4558 Op-Amps belongs to the old 1485 Op-Amp series and does not have great specs compared to modern Op-Amps. They are less priced and consume very low current but are reported to have some jitters (slow and sloppy) when it comes to quality. But again remember that modern Op-Amps like OPA2134 will consume 2-4 times more current than RC4558.

It consists of two operational amplifiers integrated inside the chip. Pin2 and Pin6 are the inverting pins of both operational amplifiers. Pin3 and pin5 are the non-inverting pins of both operational amplifiers A and B. Pin1 and Pin7 give the amplified outputs. Pin4 and Pin8 are the voltage supply connections through which IC is powered.

Symbol

Footprint

3D Model

• Operating Voltage: -15V to +15V

• Supply Current – 6.5mA (Low Power consumption)

• Common Mode Input Voltage is ±14V typically

• CMRR: 90dB

• Unity-Gain Bandwidth:3 MHz Typ

• Single Supply for two op-amps enables reliable operation

• Continuous Short Circuit Protected Outputs

• No Frequency Compensation Required

• Operating Ambient Temperature – 0˚C to 70˚C

• Available Packages: TO-99, CDIP, DSBGA, SOIC, PDIP,  DSBGA

• Wide Common-Mode and Differential Voltage Ranges

• No Frequency Compensation Required

• No Latch-Up

• Gain and Phase Match Between Amplifiers

• Low Noise . . . 8 nV/√Hz Typ at 1 kHz

Texas Instruments RC4558P technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments RC4558P.

Firstly, it has an excellent channel separation due to you can replace LM741 IC by RC4558 IC in dense single 741 operational amplifier applications. 

Secondly,  it can also be used in differential-in, differential-out and in potentiometric amplifiers applications. 

Thirdly, it has an additional feature of matched phase and gain which makes it well suited for applications requiring matched gain and phase channels.

It is also used in voltage follower applications as it has a very high common-mode input voltage range and the absence of offset null capability. In addition to the above-mentioned uses, it can also perform basic functions of operational amplifiers under the above-specified features.

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.

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.

●Transducer Amplifiers

●Conventional op-amp circuits

●Integrator, Differentiator, Summer, Voltage follower

●DC gain blocks, Digital multimeters, Oscilloscopes

●Comparators (Loop control & regulation)

●DVD Recorders and Players

●Pro Audio Mixers

●Square wave oscillator

●Lamp Driver

Texas Instruments (TI) is an American technology company headquartered in Dallas, Texas, which designs and manufactures semiconductors and various integrated circuits, and sells them to electronic designers and manufacturers worldwide. It is one of the top 10 semiconductor companies in global sales. The company focuses on the development of analog chips and embedded processors, which account for more than 80% of its revenue. TI also produces TI digital light processing technology and educational technology products, including calculators, microcontrollers and multi-core processors. As of 2016, the company has 45,000 patents worldwide.

Download datasheets and manufacturer documentation for Texas Instruments RC4558P.