DS18030-100 Digital Potentiometer Equivalent & Substitute Parts

Part Overview

The DS18030-100 is a digital potentiometer IC manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications. This component features a 100kΩ resistance network with 256 taps, dual-circuit configuration, and I2C interface control. The part is currently classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

DS18030-100

Analog Devices Inc./Maxim IntegratedIn Stock: 1109DS18030-100 Datasheet

Current PartRFQ

DS18030-100+

Analog Devices Inc./Maxim IntegratedIn Stock: 974DS18030-100+ Datasheet

DirectRFQ

DS1803E-100+

Analog Devices Inc./Maxim IntegratedIn Stock: 1093DS1803E-100+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS18030-100 is determined by strict equivalence across the following critical parameters:

• Resistance value: 100kΩ
• Number of circuits: 2
• Number of taps: 256
• Interface protocol: I2C
• Supply voltage range: 2.7V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C
• Taper characteristic: Linear
• Tolerance: ±20%
• Temperature coefficient: 750ppm/°C
• Wiper resistance: 400Ω (Typical)

Two substitute parts meet these electrical specifications. The primary distinction between substitutes is the mounting technology and package form factor, which affects PCB layout and assembly methodology but does not alter electrical performance or functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

DS18030-100+ is the direct functional equivalent with identical electrical specifications and package form factor. This part maintains through-hole mounting compatibility with existing PCB designs while offering active product status and ROHS3 compliance, eliminating the regulatory constraints associated with the obsolete DS18030-100.

DS1803E-100+ provides full electrical equivalence with identical functional parameters but employs surface-mount technology in a 14-TSSOP package. This substitute is appropriate for new designs or PCB redesigns that accommodate surface-mount assembly. The smaller package footprint and ROHS3 compliance make this option suitable for space-constrained applications.

Both substitutes are manufactured by the same supplier, maintain identical electrical performance across all specified parameters, and carry active product status with current manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can DS18030-100+ directly replace DS18030-100 in existing designs?

A: Yes. DS18030-100+ is electrically and functionally identical to DS18030-100 and uses the same 16-DIP through-hole package. No circuit modifications are required for substitution.

Q: What is the primary difference between DS18030-100+ and DS1803E-100+?

A: Both parts are electrically equivalent with identical functional specifications. The difference is mounting technology: DS18030-100+ uses through-hole mounting (16-DIP package), while DS1803E-100+ uses surface-mount technology (14-TSSOP package). Package selection depends on PCB assembly methodology and layout requirements.

Q: Are there any compliance differences between the original DS18030-100 and the substitute parts?

A: Yes. The original DS18030-100 is RoHS non-compliant. Both substitute parts (DS18030-100+ and DS1803E-100+) are ROHS3 compliant, meeting current regulatory requirements for new production and procurement.

Q: Do the substitute parts maintain the same I2C interface and addressing capabilities?

A: Yes. Both DS18030-100+ and DS1803E-100+ retain the I2C interface with selectable address functionality, ensuring software and firmware compatibility with designs using the original DS18030-100.

Q: What is the impact of the 14-TSSOP package on circuit design when using DS1803E-100+?

A: The 14-TSSOP package is smaller than the 16-DIP package and requires surface-mount assembly. PCB layout and routing must be adapted for surface-mount technology. Pin configuration and electrical function remain equivalent to the original part.