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LMC660AIMX/NOPB

CMOS quad op-amp, 4.75-15.5V, 1.4MHz GBW, rail-to-rail output, 2fA Ibias, SOIC-14

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Manufacturer Part：

LMC660AIMX/NOPB

Package：

SOIC-14 (D) (8.65 x 3.91 mm)

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Description

Product Overview

The Texas Instruments LMC660AIMX/NOPB is a CMOS quad operational amplifier featuring rail-to-rail output swing and an input common-mode range that includes ground. Operating from a single 4.75 V to 15.5 V supply, it achieves 126 dB voltage gain with ultra-low input bias current of 2 fA, making it ideal for high-impedance sensor interfaces and precision signal conditioning.

Key Specifications

Number of Amplifiers 4 (Quad)
Supply Voltage Range 4.75 V to 15.5 V
GBW 1.4 MHz
Input Bias Current 2 fA (typical)
Voltage Gain 126 dB
Slew Rate 1.1 V/µs
Package SOIC-14 (D)

Features

  • Rail-to-rail output swing
  • Input common-mode range includes V- (ground)
  • Ultra-low input bias current: 2 fA typical
  • High voltage gain: 126 dB
  • Low input offset voltage: 3 mV max
  • Low offset voltage drift: 1.3 µV/°C
  • Specified for 2 kOhm and 600 Ohm loads

Applications

  • High-impedance sensor signal conditioning
  • Photodiode and transimpedance amplifiers
  • Precision instrumentation
  • Medical monitoring equipment
  • Battery-powered analog circuits

The LMC660AIMX/NOPB is a CMOS quad operational amplifier from Texas Instruments, designed for single-supply operation from 4.75 V to 15.5 V. Built on TI’s advanced CMOS process, it achieves performance levels typically associated with bipolar amplifiers, including 126 dB open-loop voltage gain and low 22 nV/sqrt(Hz) voltage noise. The rail-to-rail output swing and input common-mode range that includes ground enable true single-supply operation without signal clipping. With ultra-low input bias current of 2 fA, the LMC660 is particularly suited for high-impedance source applications such as photodiode amplifiers and pH electrode interfaces.

The LMC660 employs a CMOS input stage that provides extremely low input bias current (2 fA typical) due to the gate insulation of the input MOSFETs. The input stage common-mode range extends to the negative rail (ground in single-supply operation), enabling direct ground-referenced signal processing. The output stage uses a complementary PMOS/NMOS push-pull configuration to achieve rail-to-rail output swing. Internal compensation ensures stability in unity-gain configurations. The low quiescent current of 400 µA per amplifier (independent of supply voltage) makes the device suitable for battery-powered applications while maintaining 1.4 MHz gain-bandwidth product.

Pin Name Type Function
1 OUT A Output Amplifier A output
2 -IN A Input Amplifier A inverting input
3 +IN A Input Amplifier A non-inverting input
4 V+ Power Positive supply voltage
5 +IN B Input Amplifier B non-inverting input
6 -IN B Input Amplifier B inverting input
7 OUT B Output Amplifier B output
8 OUT C Output Amplifier C output
9 -IN C Input Amplifier C inverting input
10 +IN C Input Amplifier C non-inverting input
11 V- Power Negative supply / ground
12 +IN D Input Amplifier D non-inverting input
13 -IN D Input Amplifier D inverting input
14 OUT D Output Amplifier D output
  • High-impedance pH and ion-selective electrode amplifiers
  • Photodiode transimpedance amplifiers
  • Precision medical instrumentation
  • Single-supply signal conditioning from ground-referenced sensors
  • Battery-powered portable measurement equipment
Manufacturer Part Number Channels GBW Notes
TI LMC6462AIMX Dual 1.4 MHz Dual version, RRIO
ADI AD8608ARZ Quad 7.3 MHz Faster RRIO CMOS op-amp
Microchip MCP6044-E/SL Quad 3.0 MHz Lower voltage, RRIO
TI OPA4340UA Quad 5.5 MHz Higher speed RRIO option
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