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Product Detailed Parameters
- Description：IC DGT POT 50KOHM 256TAP 16TQFN
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Taper：Linear
- Configuration：Potentiometer
- Number of Circuits：2
- Number of Taps：256
- Resistance (Ohms)：50k
- Interface：SPI
- Memory Type：Volatile
- Voltage - Supply：1.7V ~ 5.5V
- Features：-
- Tolerance：±25%
- Temperature Coefficient (Typ)：35ppm/°C
- Mounting Type：Surface Mount
- Supplier Device Package：16-TQFN (3x3)
- Package / Case：16-WFQFN Exposed Pad
- Operating Temperature：-40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ)：200 (Max)
- Grade：-
- Qualification：-
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Overview
The MAX5391MATE+T is a dual 256-tap volatile digital potentiometer with linear taper characteristics. It operates from a single +1.7V to +5.5V supply and features an end-to-end resistance of 50kΩ. The device includes two independent voltage-divider circuits controlled via an SPI interface. Key electrical parameters include a quiescent supply current of 12μA at 1.7V, a wiper settling time of 1200ns, and a maximum wiper resistance (RWL) of 200Ω. It maintains a low temperature coefficient of 35ppm/°C and supports SCLK frequencies up to 10MHz.
Feature Summary
- Dual 256-tap linear taper positions with 50kΩ end-to-end resistance
- SPI-compatible 3-wire serial interface for wiper control
- Low 12μA quiescent supply current at 1.7V operation
- -40°C to +125°C automotive operating temperature range
Applications
- Low-voltage battery applications
- Portable electronics
- Mechanical potentiometer replacement
- Offset and gain control in amplifiers
- Adjustable voltage references and linear regulators
Procurement Notes
Verify the component is lead-free and RoHS-compliant as indicated by the '+' suffix. Confirm the package type is 16-pin TQFN-EP with a 3mm x 3mm footprint. Ensure the ordering suffix matches the specific resistance value required, as the 'MA' designation corresponds to the 50kΩ variant within the MAX5391 family.
Selection Notes
Select this part when a dual-channel digital potentiometer with 50kΩ resistance is needed for low-voltage systems. The volatile memory requires external power retention for state storage. Verify that the system can tolerate the 200Ω wiper resistance and that the SPI timing constraints meet the microcontroller's capabilities. Consider the exposed paddle requirement for thermal management and grounding.
Part Context
This component belongs to the MAX5391/MAX5393 family of dual digital potentiometers. The MAX5391 utilizes a 16-pin TQFN-EP package, while the MAX5393 uses a 14-pin TSSOP. The 'MA' suffix specifically denotes the 50kΩ end-to-end resistance option, distinct from the 10kΩ ('LA') and 100kΩ ('NA') variants.
Replacement Considerations
Direct replacements within the same family include MAX5391LATE+T (10kΩ) and MAX5391NATE+T (100kΩ). For pin-compatible alternatives with different resistance values, consider the MAX5393 series in TSSOP packaging.
