JRC4558 Dual Operational Amplifier: Equivalent, Datasheet and Pinout

The JRC4558 is a monolithic dual operational amplifier with exceptional performance. Internally adjusted and built on a single silicon chip, the JRC4558 It's ideal for pedal circuit designs because of its high voltage gain (100 dB typ. ), good input impedance (5 M typ. ), and adaptable power supply (4 to 18 Volts).

JRC4558 Symbol

JRC4558 Footprint

• No frequency compensation required

• No latch-up

• Large common mode and differential voltage range

• Parameter tracking over the temperature range

• Gain and phase match between amplifiers

• Internally frequency compensated

• Low noise input transistors

• Pinto pin-compatible with MC1458/LM358

JRC4558 Block Diagram

Gcore JRC4558 technical specifications, attributes, parameters and parts with similar specifications to Gcore JRC4558.

• Comparators

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• Sample and Hold Amplifiers

• Photocurrent Instrumentation

• Intrusion Alarm System

• Long Duration Timers/Multivibrators (Microseconds Minutes-Hours)

LM747,LM158, LM158A, LM358, LM358A, LM2904, LM2904Q, LM4558

The JRC4558 IC is a general-purpose op-amp that can be utilized in circuits such as comparator, differential amplification, and mathematical computations. Furthermore, the device is developed specifically for applications such as transducer amplifiers and dc amplification blocks, making it easier to install in single-supply-voltage systems. These devices, for example, can be powered directly from the normal 5V supply used in digital electronics without the need for a separate -5V supply. Because the gadget has two of such op-amps on board, it may execute two separate functions at the same time, which is useful in applications. Because of its inexpensive cost and high performance, the device is popular among hobbyists and engineers.

The Vbe Multiplier sets the bias current for the Output Stage (OPS), which is a Class AB push-pull emitter follower amplifier. Q11, Q12, R6, R7, and R8 make up this block, which is outlined in blue:

JRC4558 Output Stage

The Output Stage's job is to produce enough current gain for the VAS voltage potential to exist across the low load output impedance.

The VAS efficiently drives this stage. Crossover distortion and quiescent current may be prone to significant variance due to variations in bias with temperature or amongst parts with the same type number. Because of the Vbe of the output transistors, Q11 and Q12, the JRC4558's output range is around 1.5 volts less than the supply voltage.

JRC4558 Output Stage

The output resistors R6, R7, and R8, which are inserted between output pair emitters and are also known as ballast resistors, are used to smooth out discrepancies in internal emitter resistances of transistors, allowing for better current sharing. The resistor values are typically low, which improves thermal stability, prevents complementary transistors from loading each other directly, and keeps quiescent current steady.

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