Overview
The LMC7211AIM is a micropower CMOS comparator produced by Texas Instruments. It is available in a space-saving 8-SOIC package, making it ideal for designs where space and weight are critical. This comparator operates over a wide supply voltage range of 2.7V to 15V and is designed to meet the demands of low-voltage digital systems. The LMC7211AIM features a push-pull output and an input common-mode range that extends beyond the supply rails, which simplifies design by eliminating the need for voltage dividers and amplifiers.
Key Specifications
| Parameter | Conditions | Typical Value | Maximum/Minimum Value | Units |
|---|---|---|---|---|
| Supply Voltage (V+ - V-) | - | - | 2.7V to 15V | V |
| Input Offset Voltage (VOS) | V+ = 5V, V- = 0V | 3 mV | 5 mV / 15 mV | mV |
| Input Bias Current (IB) | V+ = 5V, V- = 0V | 0.04 pA | - | pA |
| Supply Current (IS) | VOUT = Low, V+ = 5V | 7 μA | 14 μA | μA |
| Output Voltage High (VOH) | Iload = 2.5 mA, V+ = 5V | 2.5 V | 2.3 V / 2.4 V | V |
| Output Voltage Low (VOL) | Iload = 2.5 mA, V+ = 5V | 0.2 V | 0.3 V / 0.4 V | V |
| Rise Time (trise) | f = 10 kHz, Cl = 50 pF, Overdrive = 10 mV | 0.3 μs | - | μs |
| Fall Time (tfall) | f = 10 kHz, Cl = 50 pF, Overdrive = 10 mV | 0.3 μs | - | μs |
| Propagation Delay (tPHL) | f = 10 kHz, Cl = 50 pF, Overdrive = 10 mV | 10 μs | - | μs |
| Operating Temperature Range | - | - | -40°C to +85°C | °C |
| Package Type | - | - | 8-SOIC | - |
Key Features
- Tiny Package: Available in space-saving SOT23-5 and 8-SOIC packages, ideal for space and weight critical designs.
- Wide Supply Voltage Range: Operates from 2.7V to 15V, making it suitable for various applications.
- Push-Pull Output: Provides a push-pull output, enhancing the versatility of the comparator.
- Rail-to-Rail Input: Input common-mode range extends beyond the supply rails, simplifying circuit design.
- Low Power Consumption: Typical supply current of 7 μA at 5V, making it suitable for battery-powered devices.
- Fast Response Time: Response time of 4 μs at 5V, ensuring quick and accurate comparisons.
- High Input Impedance and Low Input Current: Allows for direct sensor interfacing without the need for additional amplifiers or bias circuits.
- Zero Crossing Detector Capability: Can be used as a zero crossing detector due to its ability to operate with input signals below ground.
Applications
- Battery Powered Products: Ideal for devices that require low power consumption.
- Notebooks and PDAs: Suitable for portable electronic devices.
- PCMCIA Cards: Used in compact PC card applications.
- Mobile Communications: Applicable in mobile communication devices.
- Alarm and Security Circuits: Used in security and alarm systems for accurate signal comparison.
- Direct Sensor Interface: Can directly interface with sensors without additional amplifiers.
- Power Supply Monitoring: Useful for monitoring power supply voltages and comparing them to reference voltages.
Q & A
- What is the supply voltage range of the LMC7211AIM?
The LMC7211AIM operates from 2.7V to 15V.
- What is the typical supply current of the LMC7211AIM at 5V?
The typical supply current is 7 μA at 5V.
- What is the response time of the LMC7211AIM at 5V?
The response time is 4 μs at 5V.
- What is the input common-mode voltage range of the LMC7211AIM?
The input common-mode range extends beyond the supply rails.
- Can the LMC7211AIM be used as a zero crossing detector?
Yes, it can be used as a zero crossing detector due to its ability to operate with input signals below ground.
- What is the propagation delay of the LMC7211AIM?
The propagation delay is 10 μs.
- What is the operating temperature range of the LMC7211AIM?
The operating temperature range is -40°C to +85°C.
- What package types are available for the LMC7211AIM?
It is available in 8-SOIC and SOT23-5 packages.
- Is the LMC7211AIM suitable for direct sensor interfacing?
Yes, it is suitable for direct sensor interfacing due to its high input impedance and low input current.
- Can the LMC7211AIM replace amplifiers used as comparators?
Yes, it can replace amplifiers used as comparators with better performance and lower current consumption.
