LM1458 Dual Operational Amplifier: Pinout, Datasheet, and Equivalent
Update Time: 2023-11-24 10:23:24
The LM1458 is a dual general-purpose operational amplifier (op-amp) featuring two built-in amplifiers that share a common power supply and common mode voltage. This arrangement creates interdependence between the two amplifiers.
Operating within a temperature range of 0˚C to +70˚C, the LM1458 boasts several remarkable features. These include low power consumption, latch-up-free operation, short circuit protection, and the absence of the need for external components for frequency compensation.
The op-amp's high common mode voltage range, coupled with its immunity to "latch-up," makes it exceptionally well-suited for applications requiring voltage followers. Furthermore, its high gain and wide operating voltage range contribute to superior performance in integrators, summing amplifiers, and various general feedback applications.
The LM1458 IC features a total of 8 pins, which serve various functions related to inputs, outputs, and power. The table below provides a reference for understanding the pin configuration of this op-amp IC.
Pin No. Pin Type Description 1 Output A Op-Amp 1 Output 2 Inverting Input A Op-Amp 1 Inverting Input 3 Non-inverting input A Op-Amp 1 Non-inverting input 4 V- Ground 5 Non-inverting input B Op-Amp 2 Non-inverting input 6 Inverting input B Op-Amp 2 Inverting input 7 Output B Op-Amp 2 output 8 V+ Positive supply voltage
LM1458 Features and Specifications
Operating Voltage Range: 12V DC to 18V DC (Maximum)
Maximum Power Dissipation: 400 mW
Operating Temperature Range: 0°C to +70°C
Common Mode Rejection Ratio: 70 dB to 90 dB
Slew Rate: 0.5 V/µs
Input Offset Voltage: 5 mV
Type: Dual Op-Amp with JFET Input
Maximum Offset Voltage (at 25°C): 6 mV
Typical Quiescent Current per Channel: 1.5 mA
Typical Voltage Noise at 1 kHz: 30 nV/√Hz
Package Types: 8-lead CAN and 8-lead Mini DIP
Large Common-Mode and Differential Voltage Ranges
No Frequency Compensation Required
Short Circuit Protection
Wide Differential Voltage Range
Low Power Consumption
No Latch-Up When Input Common Mode Range is Exceeded
Working and Need of an Operational Amplifier
An operational amplifier, often referred to as an op-amp, serves as a voltage amplifier in electronic circuits and functions in conjunction with external components like resistors and capacitors. These external components determine the specific role of the op-amp. The LM1458 is a dual operational amplifier with numerous applications, with one of its prominent uses being in audio amplification. Another common application for op-amps is in voltage follower circuits.
A voltage follower circuit, created with an op-amp, proves highly valuable due to its circuit's high impedance. This type of circuit is alternatively known as a buffer circuit or a unity gain amplifier, as it possesses a voltage gain of 1. In this configuration, the circuit does not amplify the input voltage but rather produces an output voltage that mimics the input voltage (the output voltage matches the input voltage). In the depicted circuit, the input voltage is applied to the non-inverting terminal of the op-amp IC. The inverting terminal, on the other hand, is linked to the op-amp's output, which is connected to a load. The output voltage is then obtained across this load.
LM1458 Schematic Diagram
LM1458 Internal Block Diagram
Voltage follower circuit
Current to voltage converter
Band pass filter.
Narrow Band or Band Pass Filter
Integrator or differentiator
TL074: The TL074 is a quad operational amplifier known for its low noise and high slew rate. It offers four op-amp circuits in a single package, making it suitable for various signal processing and amplification tasks.
LF393N: The LF393N is a quad comparator IC that can serve as an alternative to the LM1458. Comparators are used for tasks like voltage level detection and waveform shaping in applications such as waveform generation and threshold detection.
MCP6002: The MCP6002 is a dual operational amplifier with low power consumption and rail-to-rail input/output capability. It is often used in low-power and battery-operated devices where efficiency is crucial.
TLV9302: The TLV9302 is a dual low-power operational amplifier known for its low quiescent current and wide supply voltage range. It can be an equivalent option for applications where low power consumption is essential.
LM1558: The LM1558 is another dual operational amplifier. It offers similar functionality to the LM1458 and can be a suitable replacement in various applications requiring dual op-amp circuits.
Download LM1458 Datasheet PDF.
LM1458 is available in TO-99 8-Lead and PDIP 8-Lead packages.
LM1458 Using Warnings
Note: Prior to substituting these components in your circuit, ensure that you verify their parameters and pin configurations for compatibility.
The LM1458 dual operational amplifier is a reliable and versatile component that finds applications in a wide range of electronic circuits. Its dual op-amp configuration, wide voltage range, and low input offset voltage make it a favorite among electronics enthusiasts and engineers. Whether you're building an audio amplifier or a signal conditioning circuit, the LM1458 is a solid choice.
- Can LM1458 work with a single power supply?
The LM1458 is a dual operational amplifier designed for general-purpose use. It operates with both positive and negative power supplies, with a maximum power supply voltage of ±18V.
- Is there a simple function generator circuit using LM1458?
Here is a simple function generator circuit using the LM1458, a dual general-purpose operational amplifier. The LM1458 contains two independent op-amps that share a common bias network and power supply line but operate independently of each other.
- Is the LM1458 dual operational amplifier compatible with pMOS?
The LM1458 operates under a wide range of conditions and voltages. Its output is directly compatible with nearly all CMOS, PMOS, and NMOS devices. Additionally, the IC provides several valuable features, including high noise immunity, short circuit protection, and low power dissipation.
- What is the slew rate of LM1458?
The LM1458 slew rate is 0.5 V/µs.
- What are the Pros And Cons Of The LM1458 And TL072 Op-amp?
The LM1458 is a dual op-amp package, containing two independent amplifiers within a single chip. It's commonly employed as a pre-amplifier in guitar amplifiers, known for its broad frequency response and minimal noise. On the other hand, the TL072 is also a dual op-amp package, but it typically serves as a power amplifier in guitar amps. While it offers lower noise compared to the LM1458, it does have a slightly narrower frequency response.
- What is the difference between LM358 and LM1458?
The LM358 and LM1458 share identical functions and pin configuration. However, there are some distinctions between them. The LM358 has a higher offset voltage compared to the LM1458. Moreover, the LM1458 necessitates more than twice the supply voltage and consumes nearly ten times the supply power of the LM358. On the flip side, the LM1458 exhibits a more robust common mode rejection capability at 90dB, whereas the LM358 achieves 70dB. Other parameters between the two are essentially similar.
- How is op-amp a based function generator designed?
In the function generator circuit, four op-amps are utilized, with two coming from each IC (integrated circuit). The first op-amp, labeled IC 1a, is configured as an astable multivibrator. This setup involves using a feedback resistor, R1, and a timing capacitor, C1. The output of IC 1a is connected back to its non-inverting input, specifically pin 3, and this connection is made from the junction of resistors R3 and R2.
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