DS1859B-050+ Equivalent & Substitute Parts

Part Overview

The DS1859B-050+ is a digital potentiometer manufactured by Analog Devices Inc./Maxim Integrated, classified as a Data Acquisition component. This device functions as a 50kΩ 2-circuit digital potentiometer with 256 taps and I2C interface capability. The part is currently in active product status with 4814 units available in new original stock. Digital potentiometers serve critical roles in precision analog signal conditioning, calibration circuits, and programmable gain applications where mechanical potentiometers are impractical or require remote control functionality.

Substiute Parts

DS1859B-050+

Analog Devices Inc./Maxim IntegratedIn Stock: 4874DS1859B-050+ Datasheet

Current PartRFQ

DS1859B-050+

Analog Devices Inc./Maxim IntegratedIn Stock: 4874DS1859B-050+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1859B-050+ is determined by strict equivalence across the following critical parameters:

• Resistance value: 50kΩ
• Number of circuits: 2
• Number of taps: 256
• Interface protocol: I2C
• Memory type: Non-Volatile
• Supply voltage range: 2.85V ~ 5.5V
• Taper characteristic: Linear
• Configuration: Rheostat
• Package type: 16-CSBGA (4x4)
• Operating temperature range: -40°C ~ 95°C

Only components matching all these specifications across the entire parameter set qualify as direct substitutes. Partial matches or components with reduced feature sets do not constitute valid substitutions for this application.

Parameter Comparison

Engineering Selection Recommendations

The DS1859B-050+ maintains active product status with full ROHS3 compliance and REACH unaffected classification, confirming its suitability for current design implementations. The device carries MSL Level 3 rating with 168-hour moisture sensitivity window, requiring standard moisture control during storage and assembly operations. Supply voltage compatibility spans 2.85V to 5.5V, accommodating both 3.3V and 5V logic systems. The 16-CSBGA (4x4) package provides compact surface-mount integration suitable for space-constrained applications. Non-volatile memory retention ensures potentiometer settings persist through power cycles without external intervention.

Frequently Asked Questions (FAQ)

Q: What defines a valid substitute for the DS1859B-050+?

A: A valid substitute must match all critical parameters: 50kΩ resistance, 2 circuits, 256 taps, I2C interface, non-volatile memory, 2.85V–5.5V supply range, linear taper, rheostat configuration, 16-CSBGA (4x4) package, and -40°C to 95°C operating temperature. Deviations in any parameter disqualify the component as a direct substitute.

Q: Can components with different tap counts substitute for the DS1859B-050+?

A: No. The 256-tap specification directly determines resolution and step size in potentiometer applications. Components with 128, 512, or other tap counts introduce different control granularity and are not interchangeable.

Q: Is the I2C interface requirement strict for substitution?

A: Yes. The I2C protocol is fundamental to system communication architecture. Components using SPI, parallel, or other interfaces require circuit redesign and firmware modification, disqualifying them as substitutes.

Q: Does package type affect substitution eligibility?

A: Yes. The 16-CSBGA (4x4) package specifies physical dimensions, pin pitch, and PCB footprint. Alternative packages such as SOIC, TSSOP, or different BGA variants require PCB redesign and are not valid substitutes.

Q: What is the significance of non-volatile memory in this device?

A: Non-volatile memory preserves potentiometer wiper position and configuration settings during power-off states. Volatile alternatives lose stored settings upon power loss, fundamentally altering system behavior and disqualifying them as substitutes.

Q: How does the ±20% tolerance impact circuit design?

A: The ±20% tolerance establishes the acceptable resistance variation range. Applications requiring tighter tolerance specifications cannot use this component, and components with different tolerance ratings introduce unacceptable circuit performance variations.

Q: What is the role of the temperature coefficient specification?

A: The 50ppm/°C temperature coefficient quantifies resistance drift across the -40°C to 95°C operating range. This specification is critical for precision analog circuits where temperature stability directly affects measurement accuracy and signal fidelity.