DS1841X Digital Potentiometer Equivalent & Substitute Parts

Part Overview

The DS1841X is a digital potentiometer IC manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications. This component features a 22kΩ resistance network with 128 taps, I2C interface control, and integrated temperature sensing capabilities. The DS1841X is supplied as a die package for direct integration into hybrid circuits or custom assemblies.

The DS1841X has reached obsolete product status. Identifying functionally equivalent substitute parts is necessary to support ongoing system maintenance, design updates, and procurement continuity for applications currently utilizing this component.

Substiute Parts

DS1841X

Analog Devices Inc./Maxim IntegratedIn Stock: 802DS1841X Datasheet

Current PartRFQ

DS1841N+

Analog Devices Inc./Maxim IntegratedIn Stock: 1627DS1841N+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1841X is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance value: 22kΩ
• Number of taps: 128
• Interface protocol: I2C
• Supply voltage range: 2.7V ~ 5.5V
• Operating temperature range: -40°C ~ 100°C
• Taper characteristic: Logarithmic
• Number of circuits: 1
• Memory type: Non-Volatile
• Tolerance: ±20%
• Temperature coefficient: ±250ppm/°C
• Features: Selectable Address, Temperature Sensor

The DS1841N+ is identified as a manufacturer-recommended substitute. This part maintains identical electrical specifications and functional characteristics while differing only in package format and product status. The DS1841N+ is supplied in a 10-TDFN (3x3) surface-mount package, whereas the DS1841X is supplied as a die. Both parts share the same base product number (DS1841) and are manufactured by the same supplier.

Parameter Comparison

Engineering Selection Recommendations

The DS1841N+ is the direct functional equivalent to the DS1841X. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and maintain identical electrical specifications, interface protocols, and performance characteristics across the specified operating range.

The primary distinction between these parts is packaging format. The DS1841X is supplied as a die for hybrid circuit integration, while the DS1841N+ is supplied in a 10-TDFN (3x3) surface-mount package suitable for standard PCB assembly processes.

The DS1841N+ carries active product status, ensuring ongoing manufacturer support and availability. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

Selection of the DS1841N+ as a substitute requires compatibility with the 10-TDFN (3x3) package footprint and standard surface-mount assembly processes. Applications currently using die-level integration may require circuit redesign to accommodate the packaged component format.

Frequently Asked Questions (FAQ)

Q: Can the DS1841N+ directly replace the DS1841X in existing designs?

A: Electrical and functional compatibility is complete. The DS1841N+ maintains identical specifications for resistance value, tap count, I2C interface, supply voltage range, operating temperature, and all integrated features. However, the package format differs: DS1841X is a die, while DS1841N+ is a 10-TDFN (3x3) surface-mount package. Circuit redesign is required if the original design uses die-level integration.

Q: What are the key parameters that define substitution eligibility?

A: Substitution is determined by equivalence in resistance value (22kΩ), tap count (128), interface type (I2C), supply voltage range (2.7V ~ 5.5V), operating temperature range (-40°C ~ 100°C), taper characteristic (logarithmic), circuit count (1), memory type (non-volatile), tolerance (±20%), temperature coefficient (±250ppm/°C), and integrated features (selectable address, temperature sensor).

Q: Why is the DS1841X obsolete while the DS1841N+ remains active?

A: The DS1841X die format has been superseded by the DS1841N+ packaged version. Manufacturers typically transition from die-level offerings to standard package formats to support broader market applications and streamline production processes.

Q: Are there compliance differences between these parts?

A: No. Both the DS1841X and DS1841N+ maintain identical RoHS3 compliance, REACH unaffected status, and moisture sensitivity level (MSL 1 - Unlimited). Regulatory and environmental compliance requirements are equivalent.

Q: What is the 10-TDFN (3x3) package specification?

A: The 10-TDFN (3x3) is a thin dual flat no-lead package measuring 3mm × 3mm with 10 leads. This is a standard surface-mount package suitable for automated PCB assembly and is widely supported by manufacturing equipment and design tools.