DS1867-100+ Digital Potentiometer Equivalent & Substitute Parts

Part Overview

The DS1867-100+ is a digital potentiometer manufactured by Analog Devices Inc./Maxim Integrated, designed for precision resistance adjustment in data acquisition applications. This component features a 100kΩ resistance network with 256 taps across 2 circuits, controlled via serial interface with non-volatile memory storage.

The DS1867-100+ is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure availability for new production runs, repairs, and system upgrades where this part is no longer readily procurable from primary sources.

Substiute Parts

DS1867-100+

Analog Devices Inc./Maxim IntegratedIn Stock: 1123DS1867-100+ Datasheet

Current PartRFQ

MAX5489ETE+

Analog Devices Inc./Maxim IntegratedIn Stock: 769MAX5489ETE+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1867-100+ is determined by the following core parameters:

• Resistance Value: 100kΩ (exact match required)
• Number of Circuits: 2 (exact match required)
• Number of Taps: 256 (exact match required)
• Memory Type: Non-Volatile (exact match required)
• Operating Temperature Range: -40°C to 85°C (minimum requirement)
• Supply Voltage Compatibility: Must support 5V operation

The MAX5489ETE+ qualifies as a direct substitute based on matching all core functional parameters. While interface protocol and packaging differ, both components provide identical resistance network configuration and control capability through their respective serial communication standards (Serial vs. SPI).

Parameter Comparison

Engineering Selection Recommendations

The MAX5489ETE+ is an active product from the same manufacturer family, ensuring continued availability and supply chain stability. Both components maintain ROHS3 compliance and identical operating temperature specifications, supporting direct functional replacement in data acquisition circuits.

Selection between these components depends on design constraints:

• Packaging: The DS1867-100+ uses through-hole DIP mounting, while the MAX5489ETE+ requires surface-mount PCB layout. Board redesign may be necessary for MAX5489ETE+ integration.
• Interface Protocol: The DS1867-100+ uses standard serial interface; the MAX5489ETE+ uses SPI protocol. Firmware or control logic modifications are required to accommodate the protocol difference.
• Supply Voltage Range: The MAX5489ETE+ supports 2.7V to 5.25V operation, providing greater flexibility than the fixed 5V requirement of the DS1867-100+.
• Temperature Stability: The MAX5489ETE+ exhibits superior temperature coefficient performance (35ppm/°C vs. 750ppm/°C), beneficial for precision applications requiring minimal drift across the operating range.

Frequently Asked Questions (FAQ)

Q: Can the MAX5489ETE+ directly replace the DS1867-100+ without circuit modifications?

A: Functional replacement is possible, but circuit modifications are required. The primary differences are mounting type (surface mount vs. through hole) and interface protocol (SPI vs. serial). PCB layout changes and control firmware updates are necessary.

Q: Are there package compatibility considerations?

A: Yes. The DS1867-100+ is a 14-pin DIP package for through-hole mounting. The MAX5489ETE+ is a 16-pin TQFN surface-mount package. Direct socket substitution is not possible; PCB redesign is required.

Q: Do both parts support the same supply voltage?

A: The DS1867-100+ requires 5V operation. The MAX5489ETE+ supports 2.7V to 5.25V, making it compatible with 5V systems and offering additional flexibility for lower-voltage applications.

Q: What is the impact of different tolerance specifications?

A: The DS1867-100+ specifies ±20% tolerance; the MAX5489ETE+ specifies ±25%. For applications requiring tighter tolerance control, the DS1867-100+ specification is more stringent. Verify tolerance requirements against circuit design specifications.

Q: How do temperature coefficients affect circuit performance?

A: The DS1867-100+ has a temperature coefficient of 750ppm/°C, while the MAX5489ETE+ is 35ppm/°C. The MAX5489ETE+ provides significantly better resistance stability across temperature variations, beneficial for precision measurement and calibration circuits.

Q: Are both components RoHS compliant?

A: Yes. Both the DS1867-100+ and MAX5489ETE+ are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.