LMC660CN - CMOS Quad Operational Amplifier

Overview

The LMC660CN is a high-performance, CMOS quad operational amplifier designed for single-supply operation. It is optimized for applications requiring low power consumption, rail-to-rail output swing, and wide input voltage range. The device operates from a supply voltage range of +5V to +15V, making it suitable for battery-powered and portable electronics. Its CMOS architecture ensures minimal power consumption while delivering precision performance.

This operational amplifier is ideal for applications where space and power efficiency are critical, such as sensor interfaces, medical devices, and portable instrumentation. The LMC660CN is characterized by its high input impedance, low noise, and excellent DC performance, making it a versatile choice for analog signal conditioning.

Features

• Quad Operational Amplifier: Four independent op-amps in a single package, reducing board space and component count.
• Single-Supply Operation: Operates from +5V to +15V, compatible with battery-powered systems.
• Rail-to-Rail Output Swing: Maximizes dynamic range in low-voltage applications.
• Low Power Consumption: CMOS design ensures minimal power draw, ideal for portable devices.
• High Input Impedance: Reduces loading effects on signal sources.
• Wide Input Voltage Range: Supports signals near the supply rails.
• Low Noise: Suitable for precision analog applications.
• Stable Operation: Designed for reliable performance in feedback configurations.

Applications

The LMC660CN is widely used in various analog and mixed-signal applications, including:

• Portable and Battery-Powered Devices: Due to its low power consumption and single-supply operation.
• Sensor Signal Conditioning: Ideal for amplifying signals from sensors such as thermocouples, strain gauges, and pressure sensors.
• Medical Instrumentation: Used in portable medical devices where precision and low power are critical.
• Audio Processing: Suitable for low-noise audio amplifiers and filters.
• Active Filters: Can be used in low-pass, high-pass, and band-pass filter designs.
• Data Acquisition Systems: Provides signal conditioning for ADCs and other measurement circuits.

Electrical Characteristics

The following table summarizes the key electrical specifications of the LMC660CN under typical operating conditions (V_DD = +5V, T_A = 25°C unless otherwise specified):

DC Characteristics

• Supply Voltage Range: +5V to +15V
• Input Offset Voltage: 3 mV (max)
• Input Bias Current: 10 pA (typ)
• Input Offset Current: 1 pA (typ)
• Common-Mode Rejection Ratio (CMRR): 70 dB (typ)
• Power Supply Rejection Ratio (PSRR): 80 dB (typ)
• Open-Loop Gain: 100 dB (typ)

AC Characteristics

• Gain Bandwidth Product: 1.4 MHz (typ)
• Slew Rate: 1.1 V/µs (typ)
• Total Harmonic Distortion (THD): 0.01% (typ, at 1 kHz)
• Input Noise Voltage: 30 nV/√Hz (typ, at 1 kHz)

Power Consumption

• Quiescent Current (per amplifier): 1.4 mA (typ)
• Total Supply Current (all four amplifiers): 5.6 mA (typ)

Package Information

The LMC660CN is available in a standard 14-pin PDIP (Plastic Dual In-Line Package) and SOIC (Small Outline Integrated Circuit) package, providing flexibility for different PCB layouts and assembly processes.

14-Pin PDIP Package Details

• Package Type: PDIP (Plastic Dual In-Line)
• Pin Count: 14
• Dimensions: 19.3 mm x 6.35 mm (body)
• Pin Spacing: 2.54 mm (standard DIP pitch)
• Operating Temperature Range: -40°C to +85°C

14-Pin SOIC Package Details

• Package Type: SOIC (Small Outline IC)
• Pin Count: 14
• Dimensions: 8.65 mm x 3.9 mm (body)
• Pin Spacing: 1.27 mm (standard SOIC pitch)
• Operating Temperature Range: -40°C to +85°C

Conclusion

The LMC660CN is a versatile, low-power, quad operational amplifier designed for single-supply applications. Its rail-to-rail output swing, high input impedance, and low noise make it an excellent choice for a wide range of analog signal processing tasks. Whether used in portable electronics, medical devices, or industrial sensors, the LMC660CN delivers reliable performance in a compact and efficient package.