LT1009CDRG4

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The LT1009CDRG4 is a voltage reference device that is rated for 10-pin surface mount applications and typically used to provide a constant and precise reference voltage. This device can be found in many electronic appliances, automotive, industrial, and medical applications.

The LT1009CDRG4 is a precision, two-terminal programmable zener reference designed specifically for use with large value resistors, allowing it to be used in applications where two supply voltages are needed and also permits a wide range of tolerance in the reference voltage.

The LT1009CDRG4 is capable of operating over a wide input range and offers both lowesr line regulation and temperature coefficients. The LT1009CDRG4 also has an internal short-circuit limit for additional protection of the system.

To understand the LT1009CDRG4 working principle it is important to first look at its internal circuit. The device has a precision NPN transistor, diode and Zener diode connected in series. At the same time, a voltage divider is connected in series to the input voltage and is used to set the reference voltage.

When the input voltage to the reference divider reaches the pre-determined threshold value, the voltage divider begins to maintain a constant reference voltage across the device regardless of input variations in the input voltage. This reference voltage is then used to control the transistor, diode, and Zener diode, thus providing a constant output voltage.

The LT1009CDRG4 is suitable for automotive systems, consumer electronic appliances, industrial control systems, and medical devices. It is also suitable for applications that require a reference voltage that is highly stable over temperature and process variations.

The LT1009CDRG4 has many features that make it an attractive choice for application engineers, starting with its very low output noise, low input voltage, low temperature coefficient, and tight output voltage accuracy. The ultra-small 10-pin SOT-23 package also allows it to be used in compact designs.

In conclusion, the Large-Signal Precision Programmable Zener Reference, LT1009CDRG4 is a highly stable precision reference device that offers excellent performance for a wide range of applications. It can be used to provide a constant and precise voltage reference, and is ideal for applications where two supply voltages are needed. Additionally, its internal protection circuitry provides additional safety should a fault occur. The combination of features provided by this device make it an ideal choice for many application engineers.

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