Overview
The LM2901Q4T is a low-power quad voltage comparator produced by STMicroelectronics. This device is designed to operate from a single supply over a wide range of voltages, from +2 V to +36 V, or from dual supplies ranging from ±1 V to ±18 V. It consists of four independent precision voltage comparators, each capable of operating within a broad input common-mode voltage range that includes the negative rail, even when powered from a single supply voltage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | +2 V to +36 V or ±1 V to ±18 V | V |
| Supply Current (all comparators) | 1.1 mA | mA |
| Input Offset Voltage | 25 to 400 nA | nA |
| Input Bias Current | 25 nA (typ.) | nA |
| Input Offset Current | ±5 nA (typ.) | nA |
| Output Saturation Voltage | 250 mV (typ. at I_O = 4 mA) | mV |
| Large Signal Response Time | 1.3 µs (TTL input) | µs |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package Type | 16-QFN (3x3) |
Key Features
- Wide single supply voltage range or dual supplies: +2 V to +36 V or ±1 V to ±18 V
- Very low supply current: 1.1 mA independent of supply voltage
- Low input bias current: 25 nA typ.
- Low input offset current: ±5 nA typ.
- Input common-mode voltage range includes negative rail
- Low output saturation voltage: 250 mV typ. (I_O = 4 mA)
- Differential input voltage range equal to the supply voltage
- TTL, DTL, ECL, MOS, CMOS compatible outputs
Applications
The LM2901Q4T is suitable for a variety of applications, including industrial control systems, medical devices, automotive systems, and general-purpose comparator applications where low power consumption and high precision are required.
Q & A
- What is the supply voltage range for the LM2901Q4T?
The LM2901Q4T can operate from a single supply voltage ranging from +2 V to +36 V or from dual supplies ranging from ±1 V to ±18 V. - What is the typical supply current for the LM2901Q4T?
The typical supply current for all comparators is 1.1 mA, independent of the supply voltage. - What is the input offset voltage of the LM2901Q4T?
The input offset voltage ranges from 25 to 400 nA. - Is the LM2901Q4T compatible with various logic families?
Yes, the LM2901Q4T has outputs compatible with TTL, DTL, ECL, MOS, and CMOS logic families. - What is the operating temperature range for the LM2901Q4T?
The operating temperature range is from -40°C to 125°C. - What is the package type of the LM2901Q4T?
The LM2901Q4T is available in a 16-QFN (3x3) package. - Does the LM2901Q4T have any special environmental compliance?
Yes, the LM2901Q4T is available in ECOPACK packages, which meet various environmental compliance standards. - What is the maximum output current of the LM2901Q4T?
The maximum output current is approximately 20 mA, independent of the magnitude of V_CC+. - Can the input voltage exceed the power supply level?
Yes, positive excursions of the input voltage may exceed the power supply level as long as the other voltage remains within the common-mode range. - What is the response time for a large signal input step?
The large signal response time is approximately 1.3 µs for a TTL input.
