CAT5123TBI-10-T3

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The CAT5123TBI-10-T3 is a digital potentiometer device, typically used in data acquisition systems, and is ideal for controlling relative true input voltage levels in applications including mixed signal level shifting, and mixed/pseudo-differential signal level adjustment. Digital potentiometers are one of a range of quality components used in data acquisition systems. The CAT5123TBI-10-T3 digital potentiometer from Texas Instruments provides capabilities for precision absolute, relative, or mixed signal level adjustment.

The device integrates a 10-bit non-volatile non-linear digital potentiometer within a standard 10-T3 package, allowing simple connection to other digital or analog components. It also integrates a 3-wire SPI or I2C interface with 5 selectable addresses. The device is isolated for use in potentially high voltage situations, and dissipates virtually no power.

The CAT5123TBI-10-T3 digital potentiometer has a wide range of application fields including the following:

• Adjustment of relative true input voltage levels in mixed signal level shifting
• Adjustment of relative true input voltage levels in mixed / pseudo-differential signal level adjustment
• Used in low voltage circuitry applications
• Implementation as a global gain adjuster in sensitive audio applications
• Relative level-shifting of amplified signals
• Relative level-shifting of signals for use in lossless analog-to-digital converter systems

The working principle of a digital potentiometer is relatively simple; the device is constructed from three resistors arranged in a T shape. The \'wiper\' resistor is controlled by an IC which can be configured to fit multiple address code patterns allowing for a wide range of applications. In addition, the device also offers protection from static electricity and voltage spikes.

The CAT5123TBI-10-T3 device has an extremely high ratio of non-linearity over its 10 bits of resolution. This allows for more precise control over the wiper’s position in the circuit, which , in turn, allows the device to fine-tune the true input voltage levels in different applications.

In a typical application, the CAT5123TBI-10-T3 digital potentiometer can be used to control the gain of an amplifier or adjust the relative level of signals. To do so, the wiper’s position is adjusted according to the resistance value of the resistor. The position of the wiper is determined by either an SPI or I2C device-level though control, which can be set easily for the application. The wiper’s position can then be adjusted by varying the rate of change from the device-level through control.

The CAT5123TBI-10-T3 is a useful device for controlling relative true input voltage levels in data acquisition systems. By integrating a non-volatile non-linear digital potentiometer and offering protection from static electricity and voltage spikes, the CAT5123TBI-10-T3 is ideal for situations where precise adjustment of relative true input voltage levels is of paramount importance.

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