MAX5392LAUE+T

Overview

The MAX5392LAUE+T is a dual, volatile, low-voltage digital potentiometer featuring linear taper characteristics and an I²C-compatible serial interface. It provides two independent 256-tap potentiometers with an end-to-end resistance of 10kΩ. The device operates from a single +1.7V to +5.5V supply, drawing a typical quiescent current of 12µA. Key electrical specifications include a maximum integral nonlinearity (INL) of ±0.5 LSB in voltage divider mode and a wiper settling time of 400ns for the 10kΩ variant. It utilizes an internal charge pump to maintain low wiper resistance down to 1.7V and powers up with wipers set to midscale.

Feature Summary

• Dual 256-tap linear taper digital potentiometers with 10kΩ end-to-end resistance
• I²C-compatible serial interface supporting up to eight devices on one bus via address inputs A0-A2
• Single supply operation from +1.7V to +5.5V with 12µA typical standby current
• Internal charge pump ensures wiper resistance remains below 200Ω at low voltages

Applications

• Low-voltage battery-powered portable electronics
• Mechanical potentiometer replacement in industrial systems
• Adjustable gain control for operational amplifiers
• Programmable filter frequency adjustment
• Offset voltage adjustment circuits

Procurement Notes

Verify the specific suffix 'LAUE' corresponds to the 10kΩ resistance value and TSSOP-16 package. Confirm RoHS compliance status associated with the '+' designation. Ensure the design accounts for the volatile nature of the memory, requiring state restoration upon power cycling. Check that the I²C pull-up resistors are selected appropriately for the system's bus capacitance and clock speed requirements.

Selection Notes

Select this component when dual independent digital pots are required within a tight space constraint using a 16-pin TSSOP package. The 10kΩ resistance value is suitable for moderate impedance applications; consider the MAUE (50kΩ) or NAUE (100kΩ) variants if higher resistance is needed. Verify that the I²C bus speed does not exceed 400kHz and that the system voltage falls within the 1.7V to 5.5V range. The volatile memory characteristic necessitates software handling for power-loss scenarios.

Part Context

This part belongs to the MAX5392 family of dual digital potentiometers manufactured by Analog Devices/Maxim Integrated. The 'L' in the part number specifies the 10kΩ end-to-end resistance, distinguishing it from the 50kΩ (M) and 100kΩ (N) variants. The 'U' indicates the 16-pin TSSOP package, while '+T' denotes lead-free/RoHS compliance and tape-and-reel packaging. It shares the same pinout and functional architecture across the resistance variants.

Replacement Considerations

Direct pin-compatible replacements within the same family include MAX5392MAUE+T (50kΩ) and MAX5392NAUE+T (100kΩ), provided the circuit impedance tolerances allow for the change. Other Maxim dual digital potentiometers with I²C interfaces may require schematic modifications due to differing pinouts or command sets.