Overview
The LMC6042IMX/NOPB is a CMOS dual micropower operational amplifier produced by Texas Instruments. This device is renowned for its ultra-low power consumption and low input-leakage current, making it ideal for systems requiring minimal power usage. The LMC6042 operates from a single supply voltage ranging from 4.5V to 15V and features a rail-to-rail output swing, extending to each supply rail. Its input common-mode range includes ground, and it has high output drive capabilities without the need for external pull-down resistors.
The device is built using TI's advanced Double-Poly Silicon-Gate CMOS process, ensuring high performance and reliability. It is particularly suited for battery-powered instrumentation amplifiers and various other applications where low power and high input impedance are critical.
Key Specifications
| Parameter | Conditions | Typical Value | Unit |
|---|---|---|---|
| Supply Voltage | 4.5V ≤ V+ ≤ 15.5V | - | V |
| Input Offset Voltage (VOS) | V+ = 5V, V− = 0V, VCM = 1.5V, VO = V+/2 | 1 - 6 | mV |
| Input Bias Current (IB) | - | 0.002 - 4 | pA |
| Input Offset Current (IOS) | - | 0.001 - 2 | pA |
| Input Resistance (RIN) | - | >10 TeraΩ | Ω |
| Common Mode Rejection Ratio (CMRR) | 0V ≤ VCM ≤ 12.0V, V+ = 15V | 75 - 62 | dB |
| Positive Power Supply Rejection Ratio (+PSRR) | 5V ≤ V+ ≤ 15V, VO = 2.5V | 75 - 62 | dB |
| Negative Power Supply Rejection Ratio (-PSRR) | 0V ≤ V− ≤ −10V, VO = 2.5V | 94 - 74 | dB |
| Output Current (ISC) | V+ = 5V, VO = 0V (Sourcing), V+ = 5V, VO = 5V (Sinking) | 22 - 13 mA (Sourcing), 21 - 13 mA (Sinking) | mA |
| Slew Rate (SR) | V+ = 15V, Connected as Voltage Follower with 10V step input | 0.02 - 0.007 | V/μs |
| Gain-Bandwidth Product (GBW) | - | 100 kHz | kHz |
| Phase Margin (φm) | - | 60 Deg | Deg |
| Amp-to-Amp Isolation | V+ = 15V, RL = 100 kΩ connected to V+/2 | 115 dB | dB |
| Input-Referred Voltage Noise (en) | f = 1 kHz | 83 nV/√Hz | nV/√Hz |
| Input-Referred Current Noise (in) | f = 1 kHz | 0.0002 pA/√Hz | pA/√Hz |
| Total Harmonic Distortion (T.H.D.) | f = 1 kHz, AV = −5, RL = 100 kΩ, VO = 2 VPP | 0.01 % | % |
Key Features
- Ultra-Low Power Consumption: Typical supply current of 10 μA per amplifier.
- Low Input Current: Input currents as low as 2 fA typical.
- Rail-to-Rail Output Swing: Output swing extends to each supply rail.
- Input Common-Mode Range Includes Ground: Allows for input voltages that include ground.
- High Output Drive: High output drive capability without external pull-down resistors.
- Insensitivity to Latch-Up: Designed to prevent latch-up issues.
- Advanced CMOS Process: Built using TI's Double-Poly Silicon-Gate CMOS process.
- High Input Impedance: Input resistance greater than 10 TeraΩ.
- Low Noise and High Stability: Low input-referred voltage and current noise, and high stability over a wide range of operating conditions.
Applications
- Battery Monitoring and Power Conditioning: Ideal for battery-powered systems due to its ultra-low power consumption.
- Photodiode and Infrared Detector Preamplifier: Suitable for applications requiring low input current and high input impedance.
- Silicon Based Transducer Systems: Used in various transducer systems where low power and high sensitivity are required.
- Hand-Held Analytic Instruments: Perfect for portable analytic instruments such as pH probes and medical devices.
- Bar Code Reader Amplifiers: Used in bar code readers and other similar applications.
- Magnetic and Electric Field Detectors: Suitable for detecting magnetic and electric fields in various environments.
- Fire and Smoke Detection Systems: Used in safety systems that require low power and high reliability.
- Charge Amplifier for Piezoelectric Transducers: Ideal for applications involving piezoelectric transducers.
Q & A
- What is the typical supply current of the LMC6042?
The typical supply current of the LMC6042 is 10 μA per amplifier.
- What is the input current of the LMC6042?
The input current of the LMC6042 is as low as 2 fA typical.
- What is the operating supply voltage range of the LMC6042?
The LMC6042 operates from a single supply voltage ranging from 4.5V to 15V.
- Does the LMC6042 have rail-to-rail output swing?
Yes, the LMC6042 has a rail-to-rail output swing that extends to each supply rail.
- What is the input common-mode range of the LMC6042?
The input common-mode range of the LMC6042 includes ground.
- What are some typical applications of the LMC6042?
The LMC6042 is used in battery monitoring, photodiode and infrared detector preamplifiers, silicon-based transducer systems, hand-held analytic instruments, and more.
- What is the gain-bandwidth product of the LMC6042?
The gain-bandwidth product of the LMC6042 is 100 kHz.
- What is the phase margin of the LMC6042?
The phase margin of the LMC6042 is 60 degrees.
- How does the LMC6042 handle high output drive?
The LMC6042 has high output drive capability without the need for external pull-down resistors.
- What is the input-referred voltage noise of the LMC6042?
The input-referred voltage noise of the LMC6042 is 83 nV/√Hz at 1 kHz.
