Overview
The LMC6482IMMX is a CMOS dual rail-to-rail input and output operational amplifier manufactured by Texas Instruments. This device is renowned for its rail-to-rail input and output functionality, allowing it to operate over the full range of input and output signals without limitation. The LMC6482 is particularly suited for systems requiring a large input signal range, such as data acquisition systems, and is an excellent upgrade for circuits using limited common-mode range amplifiers like the TLC272 and TLC277.
The device offers excellent accuracy due to its high common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR), making it ideal for applications in low-voltage and single-supply systems. Its low power consumption and high ESD tolerance further enhance its suitability for battery-operated and other sensitive electronic systems.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | TJ = –40°C to +85°C | ±0.11 | ±0.75 | ±3.7 | mV |
| Input Offset Voltage Drift (dVOS/dT) | TJ = –40°C to +85°C | ±1 | µV/°C | ||
| Input Bias Current (IB) | TJ = –40°C to +85°C | ±0.02 | ±4 | pA | |
| Input Offset Current (IOS) | TJ = –40°C to +85°C | ±0.01 | ±2 | pA | |
| Supply Current per Amplifier (ICC) | V+ = 5V, VO = V+/2 | 0.5 | 0.7 | 0.9 | mA |
| Slew Rate (SR) | V+ = 15V, 10V step | 0.7 | 1.3 | V/µs | |
| Gain Bandwidth Product (GBP) | V+ = 15V | 1.5 | 2.7 | MHz | |
| Common Mode Rejection Ratio (CMRR) | 3V ≤ V+ ≤ 15V, V− = 0V | 74 | 82 | dB | |
| Power Supply Rejection Ratio (PSRR) | 3V ≤ V+ ≤ 15V, V− = 0V | 68 | 80 | dB | |
| Operating Temperature Range | -40 | 85 | °C |
Key Features
- Rail-to-Rail Input and Output: The LMC6482 provides a common-mode range that extends to both supply rails, ensuring full range input and output without limitation.
- Low Input Offset Voltage: Maximum input offset voltage of 2 mV, ensuring high accuracy.
- Ultra-Low Input Current: Input bias current as low as 20 fA, minimizing current draw.
- High CMRR and PSRR: Excellent common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) of up to 82 dB.
- Low Supply Voltage: Operates from 2.7 V to 16 V, making it suitable for low-voltage systems.
- High ESD Tolerance: Human body model (HBM) ESD tolerance of 4 kV.
- Extended Temperature Range: Operates from -40°C to 125°C, ensuring reliability in various environments).
- Unity Gain Stable: Stable operation in unity gain configurations).
- Multiple Package Options: Available in PDIP, SOIC, VSSOP, and MSOP packages).
Applications
- Data Acquisition Systems: Ideal for systems requiring a large input signal range).
- Battery-Powered Instrumentation: Suitable for battery-operated systems due to low power consumption).
- Instrumentation Amplifiers: Used in various instrumentation applications requiring high accuracy and low noise).
- Active Filtering: Employed in active filter circuits for precise signal processing).
- DAC Buffer: Used as a buffer for digital-to-analog converters (DACs)).
- High-Impedance Sensor Interface: Suitable for interfacing with high-impedance sensors).
- Current Sensing: Used for both high and low side current sensing applications).
- Medical Instrumentation: Applied in medical devices requiring high precision and reliability).
- Hand-held Analytic Instruments: Used in portable analytic instruments due to its low power and compact design).
Q & A
- What is the input offset voltage of the LMC6482?
The input offset voltage of the LMC6482 is typically ±0.75 mV, with a maximum of ±3.7 mV over the temperature range of -40°C to 85°C).
- What is the common-mode rejection ratio (CMRR) of the LMC6482?
The CMRR of the LMC6482 is up to 82 dB, ensuring excellent rejection of common-mode signals).
- What is the operating temperature range of the LMC6482?
The LMC6482 operates from -40°C to 85°C, with some versions extending up to 125°C).
- What are the typical supply current and power consumption of the LMC6482?
The typical supply current per amplifier is 0.7 mA, and the device is known for its low power consumption, making it suitable for battery-operated systems).
- What are the key applications of the LMC6482?
The LMC6482 is commonly used in data acquisition systems, battery-powered instrumentation, instrumentation amplifiers, active filtering, DAC buffers, high-impedance sensor interfaces, and current sensing applications).
- What are the package options available for the LMC6482?
The LMC6482 is available in PDIP, SOIC, VSSOP, and MSOP packages).
- What is the slew rate of the LMC6482?
The slew rate of the LMC6482 is typically 1.3 V/µs for a 10V step input).
- What is the gain bandwidth product (GBP) of the LMC6482?
The GBP of the LMC6482 is up to 2.7 MHz).
- Is the LMC6482 suitable for high-impedance sensor interfaces?
Yes, the LMC6482 is suitable for high-impedance sensor interfaces due to its low input bias current and high CMRR).
- Can the LMC6482 be used in medical instrumentation?
Yes, the LMC6482 can be used in medical instrumentation due to its high precision, low noise, and reliability).
