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LM358

Dual op-amp, 3-32V, ground-sensing input, 0.7MHz GBW, SOIC-8/PDIP-8

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Manufacturer Part：

LM358

Package：

SOIC-8 / PDIP-8

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Description

Product Overview

The LM358 from Texas Instruments (also ON Semiconductor, STMicroelectronics) is the industry-standard dual operational amplifier featuring a wide supply range of 3V to 32V (or ±1.5V to ±16V), input common-mode range that includes ground, and low supply current of 0.7mA (both amplifiers). It is one of the most widely used general-purpose op-amps, equivalent to one-half of the LM324 quad op-amp.

Key Specifications

  • Channels: 2 (dual)
  • Supply Voltage: 3V ~ 32V single supply, or ±1.5V ~ ±16V dual supply
  • Input Offset Voltage: 3mV typical, 7mV max @ 25°C
  • Input Bias Current: 45nA typical, 250nA max
  • Input Offset Current: 5nA typical, 50nA max
  • Input Common-Mode Range: 0V to VCC-1.5V (includes ground)
  • Gain-Bandwidth Product: 0.7MHz (original), 1.2MHz (B version)
  • Slew Rate: 0.3V/µs (original), 0.5V/µs (B version)
  • Large-Signal Voltage Gain: 100dB typical
  • Supply Current: 0.7mA typical (both amplifiers, VCC=30V)
  • Output Current: Source 20mA min, Sink 10mA min
  • Output Voltage Swing: 0V to VCC-1.5V (RL=10kΩ)
  • CMRR: 80dB typical
  • PSRR: 100dB typical
  • Channel Separation: 120dB @ 1kHz
  • Operating Temperature: 0°C ~ 70°C (LM358), -40°C ~ 85°C (LM358B)
  • Package: PDIP-8, SOIC-8, TSSOP-8, VSSOP-8, SOT-23-8

Features

  • Input common-mode range includes ground — eliminates external bias components
  • Single-supply operation (no negative supply needed)
  • Internally frequency compensated for unity-gain stability
  • Low supply current independent of supply voltage magnitude
  • Short-circuit protected outputs
  • True differential input stage
  • Direct sensing near ground level
  • ESD protection on inputs

Applications

  • Transducer amplifier and signal conditioning
  • DC gain blocks and active filters
  • Voltage followers and buffers
  • Window comparators
  • Battery-powered instrumentation
  • Current sensing and measurement

The LM358 from Texas Instruments is the industry’s most widely used dual general-purpose operational amplifier, with over 40 years of continuous production since its introduction in 1976. The key innovation is the input common-mode voltage range that includes ground (the negative supply rail), which eliminates the need for external biasing components in single-supply applications. The device operates from a single 3V to 32V supply or dual ±1.5V to ±16V supplies, drawing only 0.7mA quiescent current for both amplifiers regardless of supply voltage magnitude. The LM358 is equivalent to one-half of the LM324 quad op-amp, sharing the same input and output characteristics. The B and BA versions offer improved performance including 1.2MHz GBW, 3mV/2mV max offset voltage, 300µA/ch supply current, and integrated EMI/RFI filters. Available in PDIP-8, SOIC-8, TSSOP-8, VSSOP-8, and SOT-23-8 packages.

The LM358 uses a bipolar input stage with PNP transistors that allow the input common-mode range to extend down to and below the negative supply rail (ground in single-supply operation). This is achieved because the PNP input transistors are biased from the positive supply, and their emitters can swing to within a few hundred millivolts below ground while still maintaining collector current. The input stage feeds a differential-to-single-ended converter, followed by a high-gain voltage amplifier stage with an internal 30pF compensation capacitor that ensures stability at unity gain. The output stage is a Class-AB push-pull with current limiting and short-circuit protection. The output can swing to within approximately 1.5V of the positive rail (due to the VCE(sat) of the upper output transistor) and down to within a few millivolts of ground (through the 50µA current sink). The 0.7MHz gain-bandwidth product limits the useful closed-loop bandwidth at higher gains, but is sufficient for DC and low-frequency signal conditioning applications.

Pin Name Function
1 1OUT Amplifier 1 output
2 1IN- Amplifier 1 inverting input
3 1IN+ Amplifier 1 non-inverting input
4 GND / VEE Negative supply or ground (single supply)
5 2IN+ Amplifier 2 non-inverting input
6 2IN- Amplifier 2 inverting input
7 2OUT Amplifier 2 output
8 VCC Positive supply (3V ~ 32V)

The LM358 is used as a transducer amplifier where the ground-referenced input allows direct amplification of sensor signals (thermistors, photodiodes, strain gauges) without an offset reference. In current-sensing applications, the non-inverting input is connected to a shunt resistor near ground, and the amplifier measures the small voltage drop across it. For active filters in audio and instrumentation, two amplifiers implement a 2nd-order Sallen-Key or multiple-feedback filter stage. As a window comparator, one amplifier detects the upper threshold and the other the lower threshold, with their open-collector-style outputs combined to generate an out-of-range signal. In battery-powered devices, the 0.7mA supply current and 3V minimum supply voltage enable operation from a single lithium cell.

Model Manufacturer Key Difference
LM358B Texas Instruments Next-gen, 1.2MHz GBW, 3mV Vos, EMI filter, 36V
LM358BA Texas Instruments 2mV Vos max, -40°C to 125°C
LM324 Texas Instruments Quad version (4 op-amps), same core, 14-pin
MCP6002-I/SN Microchip CMOS, 1MHz, 1µA Iq, rail-to-rail I/O, SOIC-8
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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