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Product Detailed Parameters
- Description：IC COMPARATOR 2 GEN PUR 8SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Type：General Purpose
- Number of Elements：2
- Output Type：Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±)：2V ~ 36V, ±1V ~ 18V
- Voltage - Input Offset (Max)：7mV @ 30V
- Current - Input Bias (Max)：0.25µA @ 5V
- Current - Output (Typ)：16mA @ 5V
- Current - Quiescent (Max)：2.5mA
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：-
- Hysteresis：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The LM2903M/NOPB is a dual precision voltage comparator from Texas Instruments designed for single or split power supply operation. It features a wide supply voltage range of 2.0 V to 36 V and very low supply current drain of 0.4 mA, independent of the supply voltage. The device includes two independent comparators with an input common-mode voltage range that includes ground. Key electrical characteristics include a maximum offset voltage of 7 mV, input bias current of 25 nA, and response time of 1.5 μs. It utilizes open-collector outputs compatible with TTL, DTL, ECL, MOS, and CMOS logic systems.
Feature Summary
- Low power consumption with supply current independent of voltage magnitude
- Input common-mode voltage range includes ground potential
- Open-collector outputs allow wired-OR configuration and logic compatibility
- High differential input voltage tolerance equal to the power supply
Applications
- Battery powered applications
- Industrial applications
- Limit comparators
- Simple analog to digital converters
- Time delay generators
Procurement Notes
Verify the specific suffix 'NOPB' indicates lead-free status and RoHS compliance as per manufacturer standards. Confirm the package type matches the required SOIC-8 footprint and pinout. Ensure the operating temperature range aligns with the -40°C to +85°C specification for the LM2903 variant. Cross-reference the datasheet revision to confirm any updates to absolute maximum ratings or thermal information.
Selection Notes
Select this component when low power consumption is critical for battery-operated systems. The inclusion of ground in the common-mode input range makes it suitable for single-supply sensing near zero volts. Verify that the open-collector output architecture fits the system's pull-up requirements. Consider the 7 mV maximum offset voltage if high precision threshold detection is necessary compared to standard comparators.
Part Context
The LM2903-N is part of the LMx93-N family, which also includes the LM193, LM293, and LM393. These devices share similar internal architectures but differ in temperature ranges and offset voltage specifications. The LM2903 specifically covers the industrial temperature range (-40°C to +85°C) with a maximum offset voltage of 7 mV, distinguishing it from the military-grade LM193 and commercial variants.
Replacement Considerations
LM2903MX/NOPB
FAQ
Can the LM2903M/NOPB operate with both single and dual power supplies?
Yes, the device is designed to operate from a single supply (2.0 V to 36 V) or split supplies (±1.0 V to ±18 V).
What is the behavior of the inputs if driven negative?
If an input voltage goes negative by more than 0.3 V, the collector-base junction becomes forward biased, acting as a clamp. This is not destructive, but normal output states may be affected until the voltage returns.
