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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)：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 AD8402AR1 is a dual-channel, 8-bit digital potentiometer from Analog Devices. It provides two independent variable resistors with 256 tap positions in a 14-lead SOIC package. The nominal resistance is 1 kΩ with a ±20% tolerance and a temperature coefficient of 500 ppm/°C. It operates on a single supply voltage between 2.7 V and 5.5 V. Control is via a 3-wire SPI-compatible serial interface with a 10 MHz update rate. The device features volatile memory, power shutdown capability drawing less than 5 μA, and an operating temperature range of -40°C to +125°C.
Feature Summary
- Dual-channel architecture with 256-position resolution
- 1 kΩ nominal resistance with linear taper
- SPI-compatible 3-wire serial interface
- Power shutdown mode with <5 μA current consumption
Applications
- Mechanical potentiometer replacement
- Programmable filters, delays, and time constants
- Volume control and panning
- Line impedance matching
- Power supply adjustment
Procurement Notes
Verify the specific suffix 'R1' against the manufacturer's ordering guide to confirm the 1 kΩ resistance value and SOIC-14 package variant. Confirm RoHS compliance status for the specific manufacturing lot. Check for end-of-life notifications as availability may be limited.
Selection Notes
Select this component when a dual-channel digital solution is required with low resistance values. Ensure the system logic levels are compatible with the 2.7 V to 5.5 V supply range. Consider the 20% resistance tolerance if precise absolute resistance is critical without calibration.
Part Context
This part belongs to the AD8400/AD8402/AD8403 family of digital potentiometers. The AD8402 specifically offers two channels, whereas the AD8400 has one and the AD8403 has four. The 'R1' suffix typically denotes the 1 kΩ resistance variant within the SOIC-14 surface-mount package.
Replacement Considerations
Direct pin-to-pin replacements include other AD8402 variants with different resistance values (e.g., AD8402AN10 for 10 kΩ) or packages (e.g., AD8402ARZ). Verify that the substitute maintains the same 1 kΩ nominal resistance and SOIC-14 footprint.
