LM358DR Dual Operational Amplifier Characteristics, Applications, LM358DR vs LM358S

Ⅰ. LM358DR description

Ⅱ. Pin configuration of LM358DR

Ⅲ. What are the characteristics of LM358DR?

Ⅳ. How to adjust the gain setting of the LM358DR chip?

Ⅴ. Schematic diagram of LM358DR

Ⅵ. What is the difference between LM358DR and LM358S?

Ⅶ. What are the application fields of LM358DR?

LM358DR is a single-power dual operational amplifier, which is also a popular model on the market. It is widely used in sense amplifiers, DC gain blocks, and all other applications where operational amplifiers can be powered from a single power supply. This article will introduce it in terms of pinout, features, gain settings, applications, etc.

The LM358DR is a commonly used dual op amp integrated circuit produced by several semiconductor manufacturers. It has a length of 4.9 mm, a width of 3.91 mm, and a height of 27 mm. It contains two independent, high-gain, internal frequency-compensated operational amplifiers, which are not only suitable for single power supply use with a wide power supply voltage range, but also suitable for dual power supply operating mode. Under recommended operating conditions, the supply current is independent of the supply voltage. It has the characteristics of low power consumption, low input bias current and high common mode rejection ratio, and is widely used in signal amplification, filtering, comparison and control fields.

Replacements and equivalents:

• LM358D

• LM358DRG4

• LM358N

• LM358P

• MC3403

• TL082

1. Power pin: The chip needs to be connected to a power supply, usually dual power supplies are used. The positive power supply is +VS and the negative power supply is -VS.

2. Ground pin: The ground pins of the two amplifiers are GND1 and GND2 respectively.

3. Input pins: Each amplifier has two input pins, IN+ and IN-.

4. Output pin: Each amplifier has an output pin, namely OUT1 and OUT2.

5. Gain setting pins: Each amplifier has two gain setting pins, namely AGND1, AGND2, AGND3 and AGND4. These pins can be used to set the gain of the amplifier by connecting external resistors.

• Internal RF and EMI filters (B, BA versions)

• Maximum input offset voltage 3 mV at 25°C (A, B versions)

• Maximum input offset voltage 2 mV at 25°C (BA version)

• Wide supply voltage range from 3V to 36V (B, BA versions)

• Quiescent current: 300 µA/channel (B, BA versions)

• Unity gain bandwidth of 1.2 MHz (B, BA versions)

• Common-mode input voltage range includes ground, allowing direct sensing near ground

• For products complying with MIL-PRF-38535, all parameters are tested unless otherwise noted. For all other products, the production process does not necessarily include testing of all parameters.

LM358DR is a dual op amp chip usually used to amplify voltage signals. To adjust the gain setting of the LM358DR chip, we can do this by changing the feedback resistor. The gain is calculated as follows:

Among them, Rf is the resistance of the feedback resistor, and Rin is the resistance of the input resistor. The gain steps of the LM358DR chip are as follows.

First, we determine the target gain value, which may be determined based on our application and circuit design. Then, we select the value of the input resistor as needed. Normally, the input resistance is a fixed value related to the internal structure of the chip. We use the gain formula to calculate the value of the feedback resistor. Based on the calculated resistance value, we select the appropriate resistor. Usually, we can choose the closest standard resistor value. Then, we replace the calculated feedback resistor into the circuit and connect one end of the feedback resistor to the output of the op amp and the other end to the feedback input of the op amp. Finally, we use a test instrument (such as an oscilloscope or multimeter) to verify that the actual gain is as expected. We input a known voltage signal, then measure the output signal and confirm it by calculating the gain value.

LM358DR and LM358S are both chips based on LM358, but the packages are different. They may have slight differences in performance, but the main difference lies in the package type and application scenarios. LM358DR adopts dual in-line package, suitable for manual welding. In contrast, the LM358S uses a surface mount package, which is soldered directly to the surface of the circuit board. Surface mount package has the advantages of small size, no need for plug-in pins, and is suitable for automated production. Since the pins are shorter, it can reduce the inductance and capacitance effects of the circuit, thereby improving the high-frequency characteristics.

• Oscillator: It can be used to design simple oscillating circuits to generate signals of specific frequencies.

• Voltage follower: LM358DR can realize the function of voltage follower through simple circuit configuration. Using the voltage follower configuration of LM358DR, we can obtain a more stable and reliable output voltage to meet various practical needs.

• Instrumentation amplifier: In measurement and instrumentation applications, LM358DR can be used to design instrumentation amplifiers to improve the sensitivity of measuring instruments.

• Filter: It is applicable for creating uncomplicated RC filters, effectively eliminating high-frequency noise or undesired frequency components from the signal.

• Current source: This chip can accurately control the size of the current and provide users with stable output. Using LM358DR as a current source can simplify circuit design and improve system stability and reliability.

• Comparator: The LM358DR can be configured as a comparator to compare two input signals and output a corresponding high or low level.

• Signal amplifier: LM358DR can amplify weak signals to the required level, providing a stable and reliable signal source for various sensor applications. In many sensor applications such as temperature sensors and photoresistors, LM358DR can exert its excellent performance and provide accurate data for various monitoring systems and control circuits.

Frequently Asked Questions

1. Is LM358 a comparator?

The LM358 comparator IC consists of two inbuilt operational amplifiers (Op-Amp), which means two comparators in a single IC. 

2. What is the replacement and equivalent of LM358DR?

You can replace the LM358DR with the LM358D, LM358DRG4, LM358N, LM358P, MC3403 or TL082.

3. What is the LM358DR?

The LM358DR is a dual-operational amplifier IC, belonging to the LM358 series. It consists of two independent, high-gain, internally frequency-compensated operational amplifiers.

4. What are some common applications of the LM358DR?

The LM358DR is used in a variety of applications, including audio amplifiers, voltage followers, active filters, signal conditioning circuits, and many other analog circuit designs.