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Product Detailed Parameters
- Description：IC DGTL POT DUAL 128POS 14-SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Taper：-
- Configuration：-
- Number of Circuits：2
- Number of Taps：128
- Resistance (Ohms)：100k
- Interface：-
- Memory Type：Volatile
- Voltage - Supply：2.7V ~ 5.5V, ±2.3V ~ 2.7V
- Features：-
- Tolerance：-
- Temperature Coefficient (Typ)：-35ppm/°C
- Mounting Type：Surface Mount
- Supplier Device Package：14-SOIC
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Operating Temperature：-40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ)：-
- Grade：-
- Qualification：-
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Overview
The AD5222BR100 is a dual-channel, 128-position digital potentiometer from Analog Devices. It features two variable resistors with a nominal end-to-end resistance of 100 kΩ and a temperature coefficient of -35 ppm/°C. The device operates on a single supply of 2.7 V to 5.5 V or a dual supply of ±2.7 V. It utilizes an Increment/Decrement interface controlled by Chip Select (CS), Clock (CLK), and Up/Down (U/D) inputs. Key electrical parameters include a maximum supply current of 40 µA, wiper resistance of 45 Ω typical, and a resolution of 7 bits. The component is housed in a 14-lead SOIC package.
Feature Summary
- Dual-channel architecture with 128 programmable positions per channel
- Increment/Decrement control interface compatible with push-button switches
- Nominal resistance options including 100 kΩ with -35 ppm/°C temperature coefficient
- Low power consumption with maximum supply current of 40 µA
Applications
- Stereo channel audio level control
- Mechanical potentiometer replacement in instrumentation
- Remote incremental adjustment applications
- Programmable voltage-to-current conversion circuits
Procurement Notes
Verify the specific suffix 'R-14' confirms the SO-14 surface-mount package variant. Confirm the 'BR' designation indicates the extended industrial temperature range of -40°C to +85°C. Ensure compatibility with standard CMOS logic levels for the digital interface signals.
Selection Notes
Select this model when a 100 kΩ end-to-end resistance is required for dual-channel adjustment. The Increment/Decrement interface is suitable for designs avoiding microcontrollers, relying instead on mechanical switches or simple logic gates. Consider the 40 µA max current draw for low-power battery-operated systems.
Part Context
This component belongs to the AD5222 family of dual digital potentiometers. Other variants in the series offer different resistance values such as 10 kΩ, 50 kΩ, and 1 MΩ. Alternative packages like TSSOP-14 are available for compact designs, while SPI-compatible devices like the AD5203 serve similar functions with different interface requirements.
Replacement Considerations
Direct pin-compatible replacements within the same family include AD5222BR10, AD5222BR50, and AD5222BR1M, differing only in nominal resistance values. For SPI interfaces, consider the AD5203 or AD5206 series.
