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Product Detailed Parameters
- Description：IC DGT POT 100KOHM 256TP 14TSSOP
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Bulk,Tube
- Taper：Linear
- Configuration：Potentiometer
- Number of Circuits：2
- Number of Taps：256
- Resistance (Ohms)：100k
- 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：14-TSSOP
- Package / Case：14-TSSOP (0.173", 4.40mm Width)
- Operating Temperature：-40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ)：200 (Max)
- Grade：-
- Qualification：-
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Overview
The MAX5393NAUD+ is a dual 256-tap volatile linear taper digital potentiometer in a 14-pin TSSOP package. It operates from a single +1.7V to +5.5V supply with a typical quiescent current of 12µA at 1.7V and 27µA at 5.5V. The device features an SPI-compatible interface for wiper control, offering end-to-end resistance values of 10kΩ, 50kΩ, or 100kΩ (100kΩ for this specific part). It includes an internal charge pump ensuring wiper resistance remains below 200Ω down to 1.7V. The unit supports an operating temperature range of -40°C to +125°C.
Feature Summary
- Dual independent 256-tap linear taper digital potentiometers
- SPI-compatible 3-wire serial interface (CS, DIN, SCLK)
- Internal charge pump maintains wiper resistance <200Ω at low voltages
- Wiper defaults to midscale (80h) on power-up
Applications
- Low-voltage battery-powered portable electronics
- Mechanical potentiometer replacement in industrial systems
- Adjustable voltage references and linear regulators
- Offset and gain control in signal conditioning circuits
Procurement Notes
Verify component authenticity through authorized distribution channels due to the presence of counterfeit risks in the market. Confirm RoHS compliance status via the manufacturer's official documentation before integration into lead-free assembly processes.
Selection Notes
Select the MAX5393NAUD+ when a 100kΩ end-to-end resistance is required alongside a 14-pin surface-mount footprint. Ensure the application utilizes a volatile memory architecture, as stored wiper positions are lost upon power loss.
Part Context
This component belongs to the MAX5391/MAX5393 family of low-voltage digital potentiometers. The MAX5393 variant specifically utilizes a 14-pin TSSOP package, whereas the MAX5391 uses a 16-pin TQFN-EP package. Both share identical electrical characteristics and functionality.
Replacement Considerations
The MAX5393MAUD+ serves as a direct functional substitute if a 50kΩ end-to-end resistance is preferred while maintaining the same package and specifications.
FAQ
How does the device handle wiper position after power cycling?
The MAX5393NAUD+ is volatile; it loses its stored wiper setting upon power loss. Upon power-up, the Power-On Reset (POR) circuitry automatically sets both wipers to the midscale position (code 80h).
What is the maximum clock frequency for the SPI interface?
The maximum Serial Clock (SCLK) frequency is 10 MHz.
Why is the BYP pin provided on the device?
The BYP pin allows for additional filtering of the internal charge-pump output. Connecting a capacitor here reduces clock feedthrough noise on the wiper terminal and affects the charge-pump settling time.
