Overview
The LM2901N, produced by National Semiconductor (now part of Texas Instruments), is a low-power, low-offset voltage quad differential comparator. This integrated circuit is designed to provide high precision and reliability in various electronic systems. It features four independent comparators, each capable of operating over a wide supply voltage range, making it versatile for different applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage Range | 2 | - | 36 | VDC or ±1 to ±18 VDC |
| Input Offset Voltage | 2.0 | 5.0 | 7.0 | mVDC |
| Input Bias Current | 25 | 250 | 250 | nA |
| Input Offset Current | 5.0 | 50 | 50 | nA |
| Input Common-Mode Voltage Range | 0 | - | V+ - 1.5 | VDC |
| Supply Current | 0.8 | 2.0 | 2.0 | mADC |
| Output Saturation Voltage | 700 | 400 | 700 | mVDC at ISINK ≤ 4 mA |
| Output Leakage Current | 1.0 | - | 1.0 | µADC |
Key Features
- Wide supply voltage range: 2 to 36 VDC or ±1 to ±18 VDC
- Very low supply current drain: 0.8 mA independent of supply voltage
- Low input biasing current: 25 nA
- Low input offset current: ±5 nA
- Low offset voltage: ±3 mV
- Input common-mode voltage range includes ground
- Differential input voltage range equal to the power supply voltage
- Low output saturation voltage: 250 mV at 4 mA
- Output voltage compatible with TTL, DTL, ECL, MOS, and CMOS logic systems
- High precision comparators with reduced VOS drift over temperature
- Eliminates the need for dual supplies and allows sensing near ground
Applications
The LM2901N is suitable for a wide range of applications due to its high precision and versatility. Some common uses include:
- Analog-to-digital converters
- Threshold detectors
- Window comparators
- Zero-crossing detectors
- Battery-powered devices due to its low power consumption
- Automotive and industrial control systems
Q & A
- What is the supply voltage range of the LM2901N?
The LM2901N operates over a supply voltage range of 2 to 36 VDC or ±1 to ±18 VDC.
- What is the typical input offset voltage of the LM2901N?
The typical input offset voltage is 5.0 mV, with a maximum of 7.0 mV.
- How much current does the LM2901N typically draw from the supply?
The supply current is typically 0.8 mA, independent of the supply voltage.
- Is the LM2901N compatible with different logic systems?
Yes, the output voltage of the LM2901N is compatible with TTL, DTL, ECL, MOS, and CMOS logic systems.
- What is the input common-mode voltage range of the LM2901N?
The input common-mode voltage range includes ground and extends up to V+ - 1.5 VDC.
- What is the output saturation voltage of the LM2901N?
The output saturation voltage is typically 400 mV at a sink current of 4 mA.
- Can the LM2901N be used in battery-powered devices?
Yes, due to its low power consumption, the LM2901N is suitable for battery-powered devices.
- What is the differential input voltage range of the LM2901N?
The differential input voltage range is equal to the maximum-rated supply voltage.
- Is the LM2901N available in different packages?
Yes, the LM2901N is available in various packages, including 14-DIP, SOIC, SSOP, and others.
- What are some common applications of the LM2901N?
The LM2901N is commonly used in analog-to-digital converters, threshold detectors, window comparators, zero-crossing detectors, and in automotive and industrial control systems.
