MAX191BC/D Equivalent & Substitute Parts

Part Overview

The MAX191BC/D is a 12-bit Analog-to-Digital Converter (ADC) with single pseudo-differential input, designed for data acquisition applications. This component operates as a SAR (Successive Approximation Register) architecture device with integrated sample-and-hold functionality. The part is supplied as a bare die in surface mount configuration.

The MAX191BC/D is classified as obsolete. Locating equivalent or substitute components is necessary for new designs, production continuity, and system upgrades where die-level integration is not feasible or where packaged alternatives provide better manufacturability and supply chain availability.

Substiute Parts

MAX191BC/D

Analog Devices Inc./Maxim IntegratedIn Stock: 749MAX191BC/D Datasheet

Current PartRFQ

MAX191BCWG+

Analog Devices Inc./Maxim IntegratedIn Stock: 46764MAX191BCWG+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX191BC/D is determined by functional equivalence across core electrical and mechanical parameters:

Critical Matching Parameters:

• Resolution: 12 bits
• Sampling Rate: 100 kSPS minimum
• Input Configuration: Single pseudo-differential input
• Data Interface: SPI and/or Parallel support
• Architecture: SAR-based conversion
• Reference: Internal reference capability
• Digital Supply: 5V nominal operation
• Operating Temperature: 0°C to 70°C range
• Compliance: RoHS3 and REACH status

The MAX191BCWG+ qualifies as a direct functional substitute. It maintains identical electrical specifications while providing a packaged alternative (24-SOIC) to the die form factor, enabling integration into standard PCB assembly workflows.

Parameter Comparison

Engineering Selection Recommendations

The MAX191BCWG+ is the recommended substitute for the obsolete MAX191BC/D. Both components share identical core specifications: 12-bit resolution, 100 kSPS sampling rate, single pseudo-differential input, SAR architecture, and internal reference configuration.

The primary distinction is form factor: the MAX191BC/D is supplied as a bare die, while the MAX191BCWG+ is packaged in a 24-SOIC surface mount package. This packaging difference enables standard PCB assembly, testing, and field replacement capabilities not available with die-level components.

Both parts maintain full compliance with RoHS3 and REACH regulations. The MAX191BCWG+ carries active product status with established supply chain availability (46,706 units in stock), whereas the MAX191BC/D is obsolete with limited inventory (712 units).

For new designs and production applications, the MAX191BCWG+ provides superior manufacturability, supply security, and long-term availability while delivering equivalent electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the MAX191BCWG+ directly replace the MAX191BC/D in existing designs?

A: Electrical substitution is direct. Both components provide identical 12-bit SAR ADC functionality with 100 kSPS sampling, single pseudo-differential input, and internal reference. The primary design consideration is the package transition from die to 24-SOIC surface mount, which requires PCB layout and assembly process modifications.

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

A: Substitution is valid when the following parameters match: 12-bit resolution, 100 kSPS sampling rate, single pseudo-differential input, SPI/Parallel data interface, SAR architecture, internal reference type, and 0°C to 70°C operating temperature range. Both parts satisfy these criteria.

Q: Are there compliance or regulatory differences between these parts?

A: No. Both the MAX191BC/D and MAX191BCWG+ are ROHS3 compliant and REACH unaffected. Regulatory status is equivalent.

Q: What is the significance of the product status difference?

A: The MAX191BC/D is classified as obsolete, indicating discontinued manufacturing and limited remaining inventory. The MAX191BCWG+ maintains active status with full manufacturing support and established supply chain availability, making it the appropriate choice for ongoing production and new designs.

Q: Are there supply voltage differences I should consider?

A: The MAX191BC/D specifies digital supply as 4.75V to 5.25V with analog supply unspecified. The MAX191BCWG+ specifies digital supply as 5V nominal with analog supply options of ±5V or 5V. Both operate within standard 5V logic levels. Verify your specific power distribution design against the MAX191BCWG+ datasheet for analog supply requirements.

Q: What packaging considerations apply to the MAX191BCWG+?

A: The MAX191BCWG+ uses a 24-SOIC package (0.295" width, 7.50mm body). Standard surface mount assembly equipment and processes apply. Ensure PCB footprint design and reflow profile compatibility with SOIC package specifications.