Overview
The LMC6482IMX/NOPB is a dual low-power, very low noise, rail-to-rail input-and-output CMOS operational amplifier (Op Amp) manufactured by Texas Instruments. This device is part of the LMC648x series, which is known for its rail-to-rail performance, extending the common-mode range to both supply rails. This feature, combined with excellent accuracy due to a high Common-Mode Rejection Ratio (CMRR), makes the LMC6482 an excellent choice for systems requiring a large input signal range, such as data acquisition systems. It is also an excellent upgrade for circuits using limited common-mode range amplifiers like the TLC272 and TLC277.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Offset Voltage (VOS) | ±0.9 | ±2 | ±3.7 | mV |
| Input Offset Voltage Drift (dVOS/dT) | ±2 | µV/°C | ||
| Input Bias Current (IB) | ±0.02 | pA | ||
| Input Offset Current (IOS) | ±0.01 | pA | ||
| Common-Mode Rejection Ratio (CMRR) | 55 | 74 | dB | |
| Positive Power Supply Rejection Ratio (+PSRR) | 60 | 82 | dB | |
| Negative Power Supply Rejection Ratio (-PSRR) | 60 | 82 | dB | |
| Output Short Circuit Current (ISC) | 11 | 15 | 20 | mA |
| Operating Temperature Range | -40 | 85 | °C | |
| Package Types | PDIP, SOIC, VSSOP |
Key Features
- Rail-to-rail input common-mode voltage range (specified over temperature)
- Rail-to-rail output swing (within 20mV of supply rail, 100kΩ load)
- Specified 3V, 5V, and 15V performance
- Excellent CMRR and PSRR: 82dB
- Ultra-low input current: 20fA
- Specified for 2kΩ and 600Ω loads
- Improved replacement for TLC272, TLC277
Applications
- Data acquisition (DAQ)
- Currency counter
- Oscilloscope (DSO)
- Intra-DC interconnect (METRO)
- Macro remote radio unit (RRU)
- Multiparameter patient monitor
- Merchant telecom rectifiers
- Train control and management
- Process analytics (pH, gas, concentration, force, and humidity)
- Three phase UPS
Q & A
- What is the input offset voltage of the LMC6482IMX/NOPB?
The input offset voltage (VOS) is typically ±2 mV, with a maximum of ±3.7 mV over the temperature range.
- What is the common-mode rejection ratio (CMRR) of the LMC6482IMX/NOPB?
The CMRR is typically 74 dB, with a minimum of 55 dB.
- What are the package options available for the LMC6482IMX/NOPB?
The device is available in PDIP, SOIC, and VSSOP packages.
- What is the operating temperature range of the LMC6482IMX/NOPB?
The operating temperature range is from -40°C to 85°C.
- What are some typical applications of the LMC6482IMX/NOPB?
Typical applications include data acquisition, currency counters, oscilloscopes, intra-DC interconnects, and process analytics among others.
- What is the output short circuit current of the LMC6482IMX/NOPB?
The output short circuit current is typically 15 mA, with a maximum of 20 mA.
- Is the LMC6482IMX/NOPB suitable for battery-operated systems?
Yes, it is suitable due to its specified low-voltage characteristics and low-power dissipation.
- What is the input bias current of the LMC6482IMX/NOPB?
The input bias current is typically ±0.02 pA.
- Can the LMC6482IMX/NOPB replace older operational amplifiers like the TLC272 and TLC277?
Yes, it is an improved replacement for these older models.
- What is the rail-to-rail output swing capability of the LMC6482IMX/NOPB?
The device maintains a rail-to-rail output swing within 20 mV of the supply rail for loads down to 600 Ω.
