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Product Detailed Parameters
- Description：LOW POWER DUAL VOLTAGE COMPARATO
- Series：-
- Mfr：Shenzhen Slkormicro Semicon Co., Ltd.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：-
- Number of Elements：-
- Output Type：-
- Voltage - Supply, Single/Dual (±)：-
- Voltage - Input Offset (Max)：-
- Current - Input Bias (Max)：-
- Current - Output (Typ)：-
- Current - Quiescent (Max)：-
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：-
- Hysteresis：-
- Operating Temperature：-
- Package / Case：-
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- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The LM2903 is a dual low-power voltage comparator designed for single-supply operation over a wide voltage range, typically +2 V to +36 V, or dual supplies of ±1 V to ±18 V. It features very low supply current (0.4 mA) independent of supply voltage and low input bias current (25 nA typical). The input common-mode voltage range includes the negative rail, even with single-supply operation. Output saturation voltage is low (250 mV typical at IO = 4 mA), and the differential input voltage range equals the supply voltage. Outputs are compatible with TTL, DTL, ECL, MOS, and CMOS logic families.
Feature Summary
- Dual independent low-power voltage comparators optimized for single-supply wide-voltage applications
- Input common-mode voltage range extends to the negative supply rail during single-supply operation
- Low output saturation voltage enabling efficient interfacing with various logic families
- Supply current remains constant regardless of supply voltage variations
Applications
- Signal processing circuits requiring precise voltage threshold detection
- Sensor interfaces in industrial and automotive electronic systems
- Motor drive control systems utilizing open-collector outputs
- Consumer electronics employing low-power comparison functions
Procurement Notes
Verify manufacturer origin as STMicroelectronics is the primary source; Shenzhen Slkormicro may distribute equivalents. Confirm package type (SOIC-8, DIP-8, etc.) and temperature grade against design requirements. Check for AEC-Q100 automotive qualification if used in vehicle applications. Ensure datasheet matches specific suffix variants for electrical tolerances like input offset voltage.
Selection Notes
Select based on required supply voltage range and input common-mode specifications. Consider input offset voltage tolerance if precision is critical. Verify output drive capability and compatibility with downstream logic levels. Evaluate thermal performance for high-temperature environments. Compare supply current consumption against power budget constraints.
Part Context
The LM2903 belongs to the LM29xx series of operational amplifiers and comparators from STMicroelectronics. It is functionally similar to the LM393 but offers improved performance characteristics such as lower input offset voltage and better temperature stability. The device is widely used in general-purpose analog signal conditioning and switching applications.
Replacement Considerations
LM393 is a pin-compatible alternative with slightly higher input offset voltage. LM2903W offers enhanced ESD protection. LM2903H supports extended operating temperatures up to 150°C. Verify electrical parameters and package dimensions before substitution.
