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Operational Amplifier LM324N DIP 14 Quad OP-Amp

Operational Amplifier LM324N DIP 14 Quad OP-Amp

The LM324 is a quad-channel operational amplifier (Op-Amp) IC featuring four independent amplifiers in a single package. Designed for low-power, low-cost applications, it operates across a wide voltage range from 3V to 32V without the need for external biasing. The LM324 is RoHS-compliant, lead-free, and halogen-free, making it suitable for environmentally-conscious designs. It is widely used in signal conditioning, filtering, amplification, and other analog functions in electronics.

Package Includes:

  • 1 x Operational Amplifier LM324N DIP

8.00 AED 8.00 AED (Tax included)

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Features:

  • 4 independent operational amplifiers in a DIP-14 package
  • Short-circuit protection (on some variants)
  • Internally frequency-compensated for unity gain
  • True differential input stage
  • Large DC voltage gain: 100 dB
  • Wide bandwidth: 1 MHz (unity gain)
  • Single-supply operation from 3V to 32V
  • Input voltage range equals power supply range
  • Output voltage swing from 0V to V+ − 1.5V

 

Principle of Work:

Operational amplifiers are multi-stage amplifiers packaged into a single integrated circuit. Each op-amp within the LM324 has two inputs — an inverting (-) and a non-inverting (+) — and a single output. The output signal’s phase depends on which input is used. If an input signal is applied to the inverting terminal, the output is 180° out of phase. If applied to the non-inverting terminal, the output remains in phase. The LM324 supports single or dual power supply configurations using pins 4 (Vcc) and 11 (Vee/GND).

Pinout:

LM324 Pinout

Pin Description
1 Output 1
2 Inverting Input 1
3 Non-inverting Input 1
4 Vcc (Positive Supply)
5 Non-inverting Input 2
6 Inverting Input 2
7 Output 2
8 Output 3
9 Inverting Input 3
10 Non-inverting Input 3
11 Vee/GND (Negative Supply or Ground)
12 Non-inverting Input 4
13 Inverting Input 4
14 Output 4

Applications:

  • Audio mixers and preamplifiers
  • Voltage follower/buffer circuits
  • DC gain blocks and signal conditioning
  • Cell phone detectors and RF sensors
  • Oscilloscopes, inverters, UPS systems
  • Analog computing operations: summing, integration, differentiation

Circuit Example:

LM324 Cell Phone Detector Circuit

LM324 Cell Phone Detector

This simple circuit detects mobile phone signals in the 10–20m range. It activates a piezo buzzer and LED when RF activity is detected, useful for surveillance or signal detection applications.

Technical Details:

Parameter LM324
Input Offset Voltage 3 mV
Input Bias Current 100 nA
Input Offset Current 30 nA
Common Mode Voltage Range -1.5V to Vcc
Voltage Gain 100 V/mV
Supply Current 3.0 mA
Common Mode Rejection Ratio 85 dB
Supply Voltage Up to 32V
Thermal Resistance 88 °C/W (junction-to-ambient)
Power Dissipation (PDIP) 1130 mW
Junction Temperature 70°C

Comparisons:

Specification LM358 LM324
Supply Voltage Up to 32V Up to 32V
Power Dissipation 830 mW (DIP) 1130 mW (DIP)
Input Offset Voltage 5 mV 5 mV
Offset Voltage Drift 20 µV/°C 30 µV/°C

Resources: