MAX122BC/D Equivalent & Substitute Parts

Part Overview

The MAX122BC/D is a 12-bit Analog to Digital Converter (ADC) with a single-ended input, SAR architecture, and 333 kSPS sampling rate. This component is classified as obsolete and is no longer in active production. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for system redesign, board revision, or inventory replenishment when original stock becomes unavailable.

Substiute Parts

MAX122BC/D

Analog Devices Inc./Maxim IntegratedIn Stock: 920MAX122BC/D Datasheet

Current PartRFQ

MAX122BCWG+

Analog Devices Inc./Maxim IntegratedIn Stock: 957MAX122BCWG+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX122BC/D is determined by matching the following critical electrical and mechanical parameters:

• Resolution: 12-bit conversion capability
• Sampling Rate: 333 kSPS minimum performance
• Input Configuration: Single-ended input channel
• Interface Protocol: Parallel data output
• Converter Architecture: SAR topology
• Reference Options: Support for both external and internal reference sources
• Supply Voltage: Digital supply range of 4.75V to 5.25V
• Temperature Range: Operating specification of 0°C to 70°C

The MAX122BCWG+ qualifies as a direct substitute based on these parameters. Both parts share the same base product number (MAX122) and maintain identical electrical specifications while differing in package format and product status.

Parameter Comparison

Engineering Selection Recommendations

The MAX122BCWG+ is the primary substitute for the MAX122BC/D. Both components maintain identical electrical specifications and are manufactured by Analog Devices Inc./Maxim Integrated. The key distinction is product status: the MAX122BC/D is obsolete, while the MAX122BCWG+ is active and currently in production.

Both parts carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints for either component.

The primary design consideration is the package format change from die to 24-SOIC. This transition requires PCB layout modification and may necessitate changes to assembly processes. Electrical functionality and performance characteristics remain equivalent.

Frequently Asked Questions (FAQ)

Q: Can MAX122BCWG+ directly replace MAX122BC/D in existing designs?

A: Electrical substitution is valid. The MAX122BCWG+ provides identical ADC performance (12-bit, 333 kSPS, single-ended input, SAR architecture). However, the package change from die to 24-SOIC requires PCB redesign and assembly process modification.

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

A: Substitution is based on matching: resolution (12-bit), sampling rate (333 kSPS), input configuration (single-ended), interface type (parallel), converter architecture (SAR), reference capability (external/internal), supply voltage range (4.75V–5.25V), and operating temperature (0°C–70°C).

Q: Are there compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical MSL ratings of 1 (Unlimited). Regulatory and environmental compliance is equivalent.

Q: Why is the MAX122BC/D obsolete?

A: The MAX122BC/D is classified as obsolete by the manufacturer. The MAX122BCWG+ represents the active production alternative with the same electrical specifications.

Q: What is the impact of the package change?

A: The MAX122BC/D is supplied as a die, while the MAX122BCWG+ is packaged in 24-SOIC format. This requires PCB layout redesign, different mounting procedures, and updated assembly specifications. Electrical performance remains unchanged.