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Product Detailed Parameters
- Description：IC DGTL POT 1KOHM 256TAP 14SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Taper：Linear
- Configuration：Potentiometer
- Number of Circuits：2
- Number of Taps：256
- Resistance (Ohms)：1k
- Interface：SPI
- Memory Type：Volatile
- Voltage - Supply：2.7V ~ 5.5V
- Features：-
- Tolerance：±33%
- Temperature Coefficient (Typ)：700ppm/°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 AD8402ARZ1 is a dual-channel, 8-bit digital potentiometer from Analog Devices. It features two independent variable resistors with a nominal resistance of 1 kΩ and 256 tap positions. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and utilizes an SPI-compatible 3-wire serial interface for data input. It includes a power shutdown mode consuming less than 5 μA and functions over an extended industrial temperature range of -40°C to +125°C.
Feature Summary
- Dual-channel architecture with 256-position linear taper resolution
- SPI-compatible 3-wire serial interface with 10 MHz update rate
- Power shutdown mode reduces current consumption below 5 μA
- Extended industrial operating temperature range (-40°C to +125°C)
Applications
- Mechanical potentiometer replacement
- Programmable filters, delays, and time constants
- Volume control and panning circuits
- Line impedance matching
Procurement Notes
Verify component status as the AD8402 series may be subject to end-of-life notices or obsolescence. Confirm availability through authorized distributors and check for alternative packaging options such as reel variants if required for surface-mount assembly processes.
Selection Notes
Select this model for applications requiring dual independent variable resistors in a compact SOIC-14 package. Ensure the system logic levels are compatible with the 2.7 V to 5.5 V supply range. Consider the 1 kΩ nominal resistance value against load requirements and verify that volatile memory behavior aligns with system power-up states.
Part Context
This component belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. The AD8402 specifically provides two channels in space-saving packages, replacing traditional mechanical pots. It shares core specifications like the 8-bit resolution and serial interface with the single-channel AD8400 and quad-channel AD8403 variants.
Replacement Considerations
Direct replacements within the same family include the AD8402ARZ10 (10 kΩ), AD8402ARZ50 (50 kΩ), and AD8402ARZ100 (100 kΩ). These share identical pinouts and functionality but differ in nominal resistance values.
