LM2902VDTBG Datasheet/PDFLM2902VDTBG Application Field and Working Principle
The LM2902VDTBG™is an ultra-low offset (ULO) single supply dual-channel high speed differential comparator featuring rail-to-rail comparator inputs with extended common-mode voltage range up to 10-V above and below the supply voltage, a high output drive of ±21 mA with low power operation of 50 uA per channel. This bipolar device is designed specifically for improved performance in automotive systems, where multimode operation and low supply voltage coupled with high speed is essential.
The LM2902VDTBG is used in applications that require comparison of two signal levels, such as Motor Control, Power Management, Sensor Interfacing, Measurement and Automotive System Design.
The LM2902VDTBG is a two-channel, high-speed differential comparator that has two comparator inputs. Each input signal is compared to the signal on the other input using the LM2902VDTBG\'s internally generated reference voltage (Vref). When both input signals have the same input value, the LM2902VDTBG passes an output signal indicating an acceptable condition exists. If the input signals vary, the LM2902VDTBG switches a logic "1" when the non-inverting input is greater in value than the inverting input and a logic "0" when the inverting input value is higher. This application field wide for the LM2902VDTBG.
Working Principle
The working principle for the LM2902VDTBG is based on the operation of the differential comparator. This device has two input signals (In & Inv) and a single output. The input signals are compared with a reference voltage (VRef) generated internally by the LM2902VDTBG. If the input signals have the same input value, the output will be a logic "1". However, if the input signals vary, the LM2902VDTBG will switch the output to a logic "0" if the inverting input is higher than the non-inverting input, or to a logic "1" if the non-inverting input is higher than the inverting input. This differential operation is key in applications that require comparison of two signal levels.
The LM2902VDTBG also features low input bias currents and low input offset voltage that enable better linearity and stability of the output over a wide range of output voltages. The ultralow offset of this device helps achieve improved accuracy and precision in sensing and measurement applications.
The LM2902VDTBG operates from a single supply voltage between 4.5V and 40V, making it ideal for automotive and other applications requiring these specifications. The LM2902VDTBG can also operate with a dual-supply voltage between ±2.25V and ±20V for improved linearity when compared to single-supply operation.
Conclusion
The LM2902VDTBG is designed for use in applications requiring precise comparison of two input signals, such as Motor Control, Power Management, Sensor Interfacing, Measurement and Automotive System Design. The device features low input bias current and a low input offset voltage which enable better linearity and stability of the output over a wide range of output voltages. Furthermore, the LM2902VDTBG operates from a single or a dual supply voltage, making it ideal for automotive applications.
The LM2902VDTBG is a low-cost, high-performance device providing exceptional accuracy and precision for automotive and other applications, making it an ideal choice for any application requiring accurate comparison of two signals.