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Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

The LT1881IS8#TRPBF is a high-performance low-power integrated circuit (IC) specifically designed to provide a low-noise, low-power programmable current source that can have up to 10mA of output current. The device has low noise characteristics, programmability and on-chip feedback amplifier that provide a stable output current. It is suitable for applications that require high accuracy, flexibility and reliable performance.

LT1881IS8#TRPBF Application Fields

• Control applications
• Data acquisition
• Industrial instrumentation
• Medical instrumentation
• Test and measurement systems

LT1881IS8#TRPBF Working Principle

The LT1881IS8#TRPBF consists of two voltage-controlled current sources, each providing 0.5mA to 10mA of current. The current is controlled by an external voltage that is applied to the voltage-to-current converter or VCC pin. In order to ensure the accuracy of the output current, a current reference and an error amplifier are used. The current reference is a precision resistor network connected between the VCC and GND pins, which sets the output current to a specific value determined by the applied voltage on VCC. The error amplifier is an operational amplifier (op-amp) whose output (ERR pin) is compared against the reference voltage, and if the difference is non-zero, the op-amp output will be adjusted to compensate for the difference and thus maintain the output current at a set value.

The LT1881IS8#TRPBF also features a programmable current limit and the output current can be limited by adjusting the voltage at the IC\'s CL pin. This feature can be used to reduce the amount of current going to a load if it exceeds the specified limit.

Conclusion

The LT1881IS8#TRPBF is a high-performance low-power IC designed to provide a low-noise and low-power programmable current source. The device is suitable for applications that require high accuracy, flexibility, and reliable performance. The LT1881IS8#TRPBF has two voltage-controlled current sources with a programmable current limit that can be used to protect the load from excessive current.

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