Overview
The LMC7211AIM/NOPB is a micropower CMOS comparator produced by Texas Instruments. It is designed for space and weight critical applications due to its tiny SOT23-5 and SOIC-8 packages. This comparator is notable for its rail-to-rail input and push-pull output, making it versatile for various analog-to-digital interface applications. It operates over a wide supply voltage range from 2.7V to 15V, ensuring compatibility with a variety of systems, including low-voltage digital circuits.
Key Specifications
| Parameter | Conditions | Typical Value | Maximum Value |
|---|---|---|---|
| Input Offset Voltage (VOS) | TJ = 25°C, V+ = 2.7V to 15V | 3 mV to 5 mV | 8 mV to 18 mV |
| Input Common-Mode Voltage Range (CMVR) | V+ = 2.7V to 15V | -0.3 V to V+ - 0.2 V | - |
| Output Voltage High (VOH) | Iload = 2.5 mA, V+ = 5V | 2.4 V | 2.3 V |
| Output Voltage Low (VOL) | Iload = 2.5 mA, V+ = 5V | 0.3 V | 0.4 V |
| Supply Current (IS) | VOUT = Low, V+ = 5V | 7 μA | 14 μA |
| Propagation Delay Time | f = 10 kHz, Cl = 50 pF, Overdrive = 10 mV | 4 μs | - |
| Operating Temperature Range | - | -40°C to +85°C | - |
| Package Type | - | SOT23-5, SOIC-8 | - |
Key Features
- Rail-to-Rail Input: The comparator has an input common-mode voltage range that extends beyond the supply rails, making it suitable for a wide range of applications.
- Push-Pull Output: Provides a direct interface to digital circuits without the need for additional amplifiers.
- Low Input Current and High Input Impedance: Ideal for sensing high impedance signals from sensors and reducing power dissipation in timing circuits.
- Low Voltage Operation: Operates at supply voltages as low as 2.7V, making it compatible with 3V digital systems.
- Direct Sensor Interfacing: Can directly interface with sensors without the need for amplifiers or bias circuits, saving cost, space, and design time.
- Short Circuit Protection: The output has short circuit protection to prevent damage from transient voltage or current spikes.
Applications
- Battery Powered Products: Ideal for notebooks, PDAs, and other battery-powered devices due to its low power consumption.
- Mobile Communications: Suitable for mobile communication devices requiring low power and compact design.
- Alarm and Security Circuits: Used in alarm and security systems where low power and reliable operation are critical.
- Power Supply Monitoring: Can be used to monitor power supply voltages and compare them to reference voltages.
- Zero Crossing Detector: Can be used as a zero crossing detector with large input resistors.
- Sensor Interfaces: Directly interfaces with sensors, eliminating the need for amplifiers or bias circuits.
Q & A
- What is the operating temperature range of the LMC7211AIM/NOPB?
The operating temperature range is -40°C to +85°C.
- What are the typical supply current values for the LMC7211AIM/NOPB?
The typical supply current is 7 μA at 5V and 14 μA at 15V.
- What is the propagation delay time of the LMC7211AIM/NOPB?
The propagation delay time is typically 4 μs.
- Does the LMC7211AIM/NOPB have rail-to-rail input capability?
Yes, it has a rail-to-rail input common-mode voltage range.
- What types of packages are available for the LMC7211AIM/NOPB?
The comparator is available in SOT23-5 and SOIC-8 packages.
- Can the LMC7211AIM/NOPB be used for direct sensor interfacing?
Yes, it can directly interface with sensors without the need for additional amplifiers or bias circuits.
- What is the input offset voltage of the LMC7211AIM/NOPB?
The input offset voltage is typically 3 mV to 5 mV.
- Does the LMC7211AIM/NOPB have short circuit protection?
Yes, it has short circuit protection to prevent damage from transient voltage or current spikes.
- What are some common applications of the LMC7211AIM/NOPB?
Common applications include battery-powered products, mobile communications, alarm and security circuits, power supply monitoring, and sensor interfaces.
- How does the LMC7211AIM/NOPB handle high impedance signals?
The comparator has low input current and high input impedance, making it ideal for sensing high impedance signals from sensors.
