AD5253BRU1

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The AD5253BRU1 is a dual-channel 64-position, digitally controlled, nonvolatile potentiometer. This device provides a secure and independent memory to each channel, allowing the user to store two different settings at the same time. Through serial communication and current sources, the device can control the setting of two independent half-scale potentiometers, each with 64 possible positions. Certain applications that the AD5253BRU1 is well suited for include controlling system parameters in manual or automatic modes, allowing easier application tuning, adjusting audio and amplifier signals, and calibration and test of circuits.

Overview

The AD5253BRU1 consists of two independent, nonvolatile potentiometers in a single package. The separate wiper location and wiper size are the same for both potentiometers. The device has an I2C-compatible interface, bidirectional buffered logic ports (EN and PAR), and an input voltage range from 1.7 V to 5.5 V, which makes it suitable for a wide range of applications. Each channel of the device has 64 positions, with a step size of 1/63 of the wiper range, and is programmed using a 3-wire I2C interface. Programming is accomplished using the device\'s internal EEPROM. The device is also able to read the current position without changing the potentiometer setting.

The device features a low-power shutdown mode that allows power supply current to be reduced to near zero. The AD5253BRU1 is available in an 8-pin SOIC, 8-pin SSOP, and die formats. This device is characterized for operation over the −40°C to +125°C temperature range.

Applications

The AD5253BRU1 is suitable for a wide range of applications, including controlling system parameters in manual or automatic modes, allowing easier system tuning, adjusting audio and amplifier signals, and calibration and testing of circuits. In addition, the device is well-suited for various applications requiring precision volume control, such as portable audio players, radio and TV systems, as well as automotive systems.

The device has the advantage of providing independent memory for each channel, which eliminates the need for an external storage device for each setting. The AD5253BRU1 also allows for the user to store two different settings at the same time, which makes the device particularly useful in systems that require both dynamic and static settings.

Working Principle

The AD5253BRU1 consists of two independent digital pots on the same package. Each digital pot has 64 resistive positions, with a wiper size and wiper bank location being the same for each of the two digital pots. Both potentiometers can be controlled over an I2C-compatible interface, making it easy to integrate into existing system architectures.

The device can be programmed to provide two independent settings for each of the two digital pots. In addition, the device allows for readback of the current pot setting without changing the pot setting. This feature is useful for selecting values for potentiometers independently, or when reading back the current state of a pot.

The device features a low-power shutdown mode which reduces power supply current to near zero, thus saving power and making the device suitable for battery-powered applications. The device also features bidirectional buffered logic ports, allowing for direct control of the potentiometers via logic pins. The I2C-compatible interface allows for both read and write operations, allowing for easy incorporation into any system architecture.

Conclusion

The AD5253BRU1 digital pot is a dual-channel, 64-position digital potentiometer with a nonvolatile memory. The high position resolution, low-power shutdown mode, I2C-compatible interface, and buffered logic ports make it ideal for adjusting audio and amplifier signals, calibrating and testing circuits, as well as controlling system parameters in manual or automatic modes. Thanks to its wide input voltage range, it is suitable for a wide range of applications.

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