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Product Detailed Parameters
- Description：SERIAL DIGI-POT 256 POSITIONS
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Taper：Linear
- Configuration：Potentiometer
- Number of Circuits：2
- Number of Taps：256
- Resistance (Ohms)：100k
- Interface：SPI
- Memory Type：Volatile
- Voltage - Supply：2.7V ~ 5.5V
- Features：-
- Tolerance：±1%
- Temperature Coefficient (Typ)：500ppm/°C
- Mounting Type：Through Hole
- Supplier Device Package：14-PDIP
- Package / Case：14-DIP (0.300", 7.62mm)
- Operating Temperature：-40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ)：200
- Grade：-
- Qualification：-
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Overview
The AD8402AN50 is a dual-channel digital potentiometer manufactured by Analog Devices Inc. It features two independent 10 kΩ resistive elements with 256 tap positions, controlled via a 3-wire or SPI-compatible serial interface. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and utilizes volatile memory to retain wiper settings only during power. Packaged in a 14-pin PDIP format, it serves as an electronic replacement for mechanical potentiometers in applications requiring programmable resistance adjustment.
Feature Summary
- Dual-channel configuration with 10 kΩ total resistance per channel
- 256-position variable resistance control via serial interface
- Compatible with standard SPI and 3-wire communication protocols
- Operates within a 2.7 V to 5.5 V single-supply range
Applications
- Programmable gain amplifiers
- Voltage reference adjustments
- Audio volume control circuits
- Sensor biasing and calibration
Procurement Notes
Verify component status prior to procurement as the AD8402 series may be subject to discontinuation notices. Confirm package type availability, as the AN suffix denotes through-hole packaging which may have limited stock compared to surface-mount variants. Cross-reference datasheets for specific temperature coefficients and tolerance levels associated with this part number.
Selection Notes
Select the AD8402AN50 when dual-channel linear resistance adjustment is required in through-hole designs. Ensure the application supports volatile memory behavior, as settings are lost upon power cycle. Verify that the system voltage remains within the 2.7 V to 5.5 V operational window and that the serial interface timing matches the device's update rate specifications.
Part Context
This component belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. The 'AN' suffix indicates a 14-lead plastic DIP package, while '50' specifies the 10 kΩ resistance value. It shares functional similarities with the AD8400 (single channel) and AD8403 (quad channel), differing primarily in channel count and package style.
Replacement Considerations
Direct substitutes include other AD8402 variants with different resistance values or packages, such as AD8402AR10 (SOIC, 10 kΩ) or AD8402ARUZ50 (TSSOP, 50 kΩ). For pin-compatible replacements, verify that the alternative device maintains the same 14-pin DIP footprint and serial interface compatibility.
