Overview
The LMC6442IMX/NOPB is a dual micropower rail-to-rail output single supply operational amplifier manufactured by Texas Instruments. This device is ideal for battery-powered systems, requiring very low supply current and rail-to-rail output swing. It is characterized for operation from 2.2V to 10V, making it suitable for single (Li-Ion) or two-cell (NiCad or alkaline) battery systems. The LMC6442 is designed to enhance the performance and longevity of battery-powered devices, such as smoke and gas detectors, pagers, cell phones, and various portable instruments.
Key Specifications
| Parameter | Typical | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (V+ - V-) | - | 2.2 | 10 | V |
| Supply Current per Amplifier | 0.95 | - | - | µA |
| Output Swing | - | V+ - 0.03 | V+ - 0.03 | V |
| Gain Bandwidth Product | 9.5 | - | - | KHz |
| Input Bias Current | 5 | - | - | fA |
| Input Voltage Range | -0.3 to V+ - 0.9 | -0.3 | V+ - 0.9 | V |
| Common Mode Rejection Ratio (CMRR) | 92 | 67 | - | dB |
| Power Supply Rejection Ratio (PSRR) | 75 | 75 | - | dB |
| Operating Temperature Range | - | -40 | 85 | °C |
Key Features
- Rail-to-Rail Output Swing: The LMC6442 can swing its output to within 30 mV of the supply rail, making it highly versatile for various applications.
- Low Supply Current: With a supply current of less than one microamp per amplifier, this device is ideal for battery-powered systems requiring long service life.
- High Voltage Gain: The amplifier has a high voltage gain of 103 dB, ensuring high accuracy in signal amplification.
- Wide Common Mode Input Voltage Range: The input voltage range includes the ground (or negative supply), making it suitable for ground sensing applications.
- Low Input Bias Current: The device features a very low input bias current of 5 fA, which is beneficial for applications requiring minimal current draw.
- Stable Operation: The amplifier is stable for closed loop gains of greater than plus two (or minus one) and can be used with a simple compensation circuit for unity gain.
Applications
- Portable Instruments: Suitable for handheld devices and portable equipment due to its low power consumption.
- Smoke/Gas/CO/Fire Detectors: Ideal for safety devices that require long battery life and accurate signal processing.
- Pagers/Cell Phones: Used in personal communication devices where low power consumption is critical.
- Instrumentation: Applicable in various measurement and monitoring instruments.
- Thermostats: Suitable for temperature control systems.
- Occupancy Sensors: Used in sensors that detect presence and absence.
- Cameras: Can be used in camera systems that require low power and high signal integrity.
- Active Badges: Ideal for wearable devices and badges that need long battery life.
Q & A
- What is the typical supply current per amplifier for the LMC6442?
The typical supply current per amplifier is 0.95 µA.
- What is the output swing capability of the LMC6442?
The output can swing to within 30 mV of the supply rail.
- What is the gain bandwidth product (GBWP) of the LMC6442?
The GBWP is typically 9.5 KHz.
- What is the input bias current of the LMC6442?
The input bias current is typically 5 fA.
- What is the common mode rejection ratio (CMRR) of the LMC6442?
The CMRR is typically 92 dB.
- What is the power supply rejection ratio (PSRR) of the LMC6442?
The PSRR is typically 75 dB.
- What is the operating temperature range of the LMC6442?
The operating temperature range is from -40°C to 85°C.
- Is the LMC6442 suitable for battery-powered systems?
Yes, it is designed for battery-powered systems, especially those requiring long service life.
- Can the LMC6442 be used in ground sensing applications?
Yes, the wide common mode input voltage range includes the ground (or negative supply), making it suitable for ground sensing applications.
- What are some common applications of the LMC6442?
Common applications include portable instruments, smoke and gas detectors, pagers, cell phones, instrumentation, thermostats, occupancy sensors, cameras, and active badges.
