MAX191BCWG Equivalent & Substitute Parts

Part Overview

The MAX191BCWG is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated, designed for single-channel data acquisition applications. This SAR (Successive Approximation Register) architecture device operates with pseudo-differential input configuration and supports both SPI and parallel data interfaces. The MAX191BCWG is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

MAX191BCWG

Analog Devices Inc./Maxim IntegratedIn Stock: 2877MAX191BCWG Datasheet

Current PartRFQ

MAX191BCWG+

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

DirectRFQ

MAX191ACWG+

Analog Devices Inc./Maxim IntegratedIn Stock: 1219MAX191ACWG+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX191BCWG are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitutability:

Critical Parameters for Substitution:

• Resolution: 12 bits
• Sampling Rate: 100 kSPS
• Number of Inputs: 1
• Input Type: Pseudo-Differential
• Data Interface: SPI and Parallel support
• Architecture: SAR
• Reference Type: Internal
• Supply Voltages: ±5V/5V (analog), 5V (digital)
• Operating Temperature: 0°C to 70°C
• Package: 24-SOIC form factor
• Mounting: Surface Mount

All identified substitute parts maintain identical electrical specifications and mechanical compatibility with the original MAX191BCWG, ensuring direct functional replacement without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

MAX191BCWG+ (Direct Substitute): The MAX191BCWG+ is the primary substitute for the obsolete MAX191BCWG. This part maintains complete electrical and mechanical equivalence while offering active product status and ROHS3 compliance. The MAX191BCWG+ is supplied in tube packaging and represents the direct continuation of the MAX191BCWG product line. Selection of MAX191BCWG+ is recommended for new production and ongoing system support where regulatory compliance and long-term availability are required.

MAX191ACWG+ (Parametric Equivalent): The MAX191ACWG+ provides parametric equivalence with identical electrical specifications and package compatibility. This part is also active and ROHS3 compliant. The MAX191ACWG+ differs only in temperature grade classification (A-grade versus B-grade), maintaining full functional compatibility for applications within the 0°C to 70°C operating range. Selection of MAX191ACWG+ is appropriate when MAX191BCWG+ availability is constrained, provided temperature specifications align with system requirements.

Both substitute parts eliminate the obsolescence risk associated with the original MAX191BCWG while maintaining design integrity and system performance.

Frequently Asked Questions (FAQ)

Q: Can MAX191BCWG+ be used as a direct replacement for MAX191BCWG? A: Yes. The MAX191BCWG+ is electrically and mechanically identical to the MAX191BCWG. All electrical parameters, pin configurations, and package dimensions are equivalent. No circuit modifications are required.

Q: What is the difference between MAX191BCWG+ and MAX191ACWG+? A: Both parts are parametrically equivalent with identical electrical specifications. The primary difference is the temperature grade designation (B-grade versus A-grade). Both operate within the 0°C to 70°C range specified for this application. Selection between them depends on availability and specific system temperature requirements.

Q: Why is the original MAX191BCWG classified as obsolete? A: The MAX191BCWG has reached end-of-life status. Analog Devices Inc./Maxim Integrated has transitioned production to the active MAX191BCWG+ and MAX191ACWG+ variants, which offer improved compliance and manufacturing continuity.

Q: Are there any compliance differences between the original part and substitutes? A: Yes. The original MAX191BCWG is RoHS non-compliant, while both MAX191BCWG+ and MAX191ACWG+ are ROHS3 compliant. Both substitute parts maintain REACH Unaffected and EAR99 ECCN classifications identical to the original.

Q: Will the 24-SOIC package dimensions remain the same across all three parts? A: Yes. All three parts use the 24-SOIC package with identical dimensions (0.295", 7.50mm width). PCB footprints and assembly processes require no modification.

Q: What inventory status should I expect for these substitute parts? A: MAX191BCWG+ has substantial inventory (46,706 pcs), while MAX191ACWG+ has more limited availability (1,157 pcs). The original MAX191BCWG has 2,812 pcs in stock but is obsolete. For long-term supply assurance, MAX191BCWG+ is the recommended selection.