Overview
The LM393D, produced by Texas Instruments, is a dual independent precision voltage comparator. It is designed to operate from either a single power supply or dual supplies, making it highly versatile for various electronic projects. The LM393D features two independent comparators, each capable of operating within a wide voltage range, from 2V to 36V for single supply and ±1V to ±18V for dual supplies. This flexibility, combined with its low input offset voltage and low input bias current, makes the LM393D an excellent choice for applications in consumer, automotive, and industrial electronics.
Key Specifications
| Parameter | Value |
|---|---|
| Package / Case | 8-SOIC (0.154, 3.90mm Width) |
| Mounting Type | Surface Mount |
| Number of Pins | 8 |
| Operating Temperature | 0°C to 70°C |
| Supply Voltage | 2V to 36V (Single), ±1V to ±18V (Dual) |
| Input Offset Voltage (Max) | 5mV @ 30V |
| Input Bias Current | 250nA |
| Propagation Delay | 1.3 μs |
| Output Type | Open Collector, compatible with TTL, MOS, CMOS |
| Output Current | 18mA @ 5V |
| Max Junction Temperature (Tj) | 150°C |
| ESD Rating (HBM) | 2kV |
Key Features
- Wide single-supply voltage range (2V to 36V) and dual-supply range (±1V to ±18V).
- Low input offset voltage (as low as 0.37mV) and low input bias current (as low as 3.5nA).
- Low supply current (200µA per comparator) independent of supply voltage.
- Faster response time of 1.3 μs.
- Common-mode input voltage range includes ground, and differential input voltage range equal to the maximum-rated supply voltage.
- Output compatible with TTL, MOS, and CMOS logic levels.
- ESD clamps on the inputs increase the ruggedness of the device without affecting performance).
- Pb-free, halogen-free/BFR-free, and RoHS compliant).
Applications
- Signal Conditioning: The LM393D is used to filter noise from analog signals by comparing incoming signals to a reference voltage.
- Motor Control: Employed for pulse width modulation (PWM) due to its high-speed differential input, facilitating motor speed and efficiency adjustments.
- Voltage Regulation: Acts as a core component in control circuits to monitor and optimize voltage levels, ensuring stability in output.
- Battery Monitoring: Used in battery monitoring systems to assess battery health and charge status, preventing overcharging or deep discharging.
- Motion Detectors: Evaluates shifts in input signals from sensors to initiate alerts or actions, enhancing responsiveness and accuracy in detection systems.
- Overcurrent Protection: Incorporated in overcurrent protection circuits to detect and prevent damage from excessive current flow.
Q & A
- What is the operating temperature range of the LM393D?
The operating temperature range of the LM393D is from 0°C to 70°C.
- What are the supply voltage ranges for the LM393D?
The LM393D can operate from a single supply voltage of 2V to 36V or dual supplies from ±1V to ±18V.
- What is the propagation delay of the LM393D?
The propagation delay of the LM393D is 1.3 μs.
- What type of output does the LM393D have?
The LM393D has an open collector output, compatible with TTL, MOS, and CMOS logic levels.
- Is the LM393D RoHS compliant?
Yes, the LM393D is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- What is the maximum input offset voltage of the LM393D?
The maximum input offset voltage of the LM393D is 5mV @ 30V.
- Can the LM393D operate with ground as part of its input range?
Yes, the LM393D can operate with ground as part of its input range, even with a single power supply.
- What is the typical response time of the LM393D?
The typical response time of the LM393D is 1.3 μs.
- Is the LM393D suitable for motor control applications?
Yes, the LM393D is suitable for motor control applications, particularly for pulse width modulation (PWM).
- What are some common applications of the LM393D?
The LM393D is commonly used in signal conditioning, motor control, voltage regulation, battery monitoring, motion detectors, and overcurrent protection circuits.
