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Product Detailed Parameters
- Description：IC DGTL POT 50KOHM 256TAP 14SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Taper：Linear
- Configuration：Potentiometer
- Number of Circuits：2
- Number of Taps：256
- Resistance (Ohms)：50k
- Interface：SPI
- Memory Type：Volatile
- Voltage - Supply：2.7V ~ 5.5V
- Features：-
- Tolerance：±30%
- Temperature Coefficient (Typ)：500ppm/°C
- Mounting Type：Surface Mount
- Supplier Device Package：14-SOIC
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Operating Temperature：-40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ)：200
- Grade：-
- Qualification：-
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Overview
The AD8402AR50-REEL is a dual-channel, 8-bit digital potentiometer from Analog Devices. It features two independent variable resistors with a nominal resistance of 50 kΩ and 256 programmable tap positions. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and utilizes a 3-wire SPI-compatible serial interface for data input. Key electrical characteristics include a typical wiper resistance of 100 Ω at 5 V, a power shutdown current of less than 5 μA, and an operating temperature range of −40°C to +125°C.
Feature Summary
- Dual-channel architecture with 256-position variable resistance control
- Nominal resistance of 50 kΩ with ±1% channel-to-channel matching tolerance
- SPI-compatible 3-wire serial interface supporting 10 MHz update rates
- Microwatt power shutdown mode via SHDN pin
Applications
- Mechanical potentiometer replacement in embedded systems
- Programmable filters, delays, and time constant adjustments
- Line impedance matching circuits
- Power supply voltage adjustment
Procurement Notes
Verify the REEL suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly. Confirm the '50' designation corresponds to the 50 kΩ resistance variant. Ensure compatibility with standard SPI controllers regarding clock polarity and phase settings.
Selection Notes
Select this component when a dual-channel solution is required for precise resistance tuning. The 50 kΩ value offers a balance between bandwidth and noise performance compared to lower or higher resistance options. Verify that the 14-lead SOIC package dimensions fit the target PCB layout constraints.
Part Context
This part belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. While the AD8400 provides a single channel and the AD8403 offers four channels, the AD8402 specifically addresses applications requiring two independent variable resistors within a compact footprint.
Replacement Considerations
Direct substitutes within the same family include the AD8402AR10 (10 kΩ) and AD8402AR100 (100 kΩ). These parts share identical pinouts and functionality but differ in nominal resistance values.
