NJM2138M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Amplifier
• Characteristics: Low noise, high gain, small package size
• Package: SOP (Small Outline Package)
• Essence: Amplification of electrical signals
• Packaging/Quantity: Available in reels of 2,500 units

Specifications

• Supply Voltage: 3V to 12V
• Input Bias Current: 1.5pA (typical)
• Gain Bandwidth Product: 10MHz (typical)
• Output Voltage Swing: ±11V (at Vcc = ±6V)
• Quiescent Current: 1.2mA (typical)

Detailed Pin Configuration

The NJM2138M IC has a total of 8 pins arranged as follows:

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| | --| 1 8 |-- --| 2 7 |-- --| 3 6 |-- --| 4 5 |-- |___________| ```

Pin Description: 1. Non-Inverting Input (+IN) 2. Inverting Input (-IN) 3. Negative Power Supply (V-) 4. Positive Power Supply (V+) 5. Output (OUT) 6. Compensation Capacitor (CC) 7. Nulling Resistor (NR) 8. Ground (GND)

Functional Features

• Low noise amplification of electrical signals
• High gain for accurate signal reproduction
• Wide supply voltage range for versatile applications
• Stable operation with compensation capacitor and nulling resistor
• Small package size for space-constrained designs

Advantages and Disadvantages

Advantages: - Low noise amplification improves signal quality - High gain allows for precise signal amplification - Versatile supply voltage range enhances flexibility - Stable operation with compensation and nulling components - Compact package size saves board space

Disadvantages: - Limited output voltage swing compared to some other amplifiers - Quiescent current consumption may be higher than certain alternatives

Working Principles

The NJM2138M is a voltage amplifier that operates by amplifying the difference between its non-inverting and inverting inputs. It utilizes internal circuitry to achieve low noise and high gain characteristics. The compensation capacitor and nulling resistor ensure stability and prevent oscillations. The IC requires a positive and negative power supply for proper operation.

Detailed Application Field Plans

The NJM2138M is commonly used in various applications, including but not limited to:

1. Audio Amplification: Provides clean and amplified audio signals for speakers, headphones, and audio systems.
2. Instrumentation: Used in precision measurement equipment to amplify weak electrical signals accurately.
3. Communication Systems: Enhances signal strength and quality in wireless communication devices and transceivers.
4. Medical Devices: Amplifies bioelectric signals for monitoring and diagnostic purposes.
5. Industrial Control: Amplifies control signals in automation systems and industrial machinery.

Detailed and Complete Alternative Models

1. LM358: Dual operational amplifier with similar characteristics and pin configuration.
2. TL071: Low-noise JFET-input operational amplifier suitable for audio applications.
3. AD822: Precision instrumentation amplifier with high common-mode rejection ratio.

These alternative models offer similar functionality and can be considered as substitutes for the NJM2138M in various applications.

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