LM293ADE4

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The LM2931ADE4 is a low-cost precision operational amplifier designed for use as a dual comparator in many linear applications. Comparators are used to compare two input voltages/currents and output a logic level based on the results. The LM2931ADE4 is a single supply dual operational amplifier allowing ± 15-V operation from a single 5-V supply and can handle up to 8 A in each channel. It is designed to have low power consumption and excellent input offset voltage, drift and noise specifications. The LM2931ADE4 is designed for LCD (liquid-crystal display) applications, as well as for power supply sequencing, power supply clamping, voltage regulator, monitor and control and current-limiting circuits.

The LM2931ADE4 has a dual differential input, with a common mode range of -15V to +15V that operates from a single removable 5-V supply. It offers a rail-to-rail output with a quiescent current of 85 μA. It has a power supply rejection ratio (PSRR) of 0.09 V/V, open loop gain at 100KHz of 0.1V/mV and a gain error of 0.05%. It also features an enable input terminal for shut off architecture, a wide bandwidth response of 160KHz, and a low offset voltage of 20 mV.

The LM2931ADE4 provides excellent temperature drift and input offset voltage specifications. The temperature coefficient of input offset voltage (TCVOS) is typically ±2 mV and the drift is approximately 0.5 μV/°C. It also has low input bias current of typically 5 nA at 25°C. The input offset current of the LM2931ADE4 is negligible, measured at typically 0.4 pA.

The output of the LM2931ADE4 allows for rail to rail operation and can sink current up to 8 mA. The output is capable of withstanding a continuous short circuit without damage. The output common mode range is 0V to VCC and will remain within the common mode voltage range throughout its entire operating temperature range.

The LM2931ADE4 is typically used in power supply sequencing, power supply clamping, voltage regulator, monitor and control and current-limiting circuits. Its low supply current and low input bias current allow it to be used in applications where power consumption is critical such as battery-powered or portable systems. It can also be used in high current or high power applications such as power converters, motor control and similar circuits.

Overall, the LM2931ADE4 is a low-cost precision operational amplifier designed for use as a dual comparator for many linear applications. It has a single supply voltage range, rail-to-rail output, quiescent current of 85μA, high PSRR, low input offset voltage, low input bias current and excellent temperature drift and input offset voltage specifications. It can be used in LCD (liquid-crystal display) applications, power supply sequencing, power supply clamping, voltage regulator, monitor and control and current-limiting circuits.

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