MAX135CWI 15-Bit Analog to Digital Converter Equivalent & Substitute Parts

Part Overview

The MAX135CWI is a 15-bit analog to digital converter manufactured by Analog Devices Inc./Maxim Integrated, designed for multi-slope conversion applications requiring differential input processing. This component operates with dual supply voltages (±5V analog and digital) and delivers a 16 samples-per-second sampling rate in a 28-SOIC surface mount package.

The MAX135CWI is classified as obsolete. Identifying suitable substitute components is necessary to support legacy system maintenance, design continuity, and procurement planning for applications currently utilizing this ADC architecture.

Substiute Parts

MAX135CWI

Analog Devices Inc./Maxim IntegratedIn Stock: 2609MAX135CWI Datasheet

Current PartRFQ

MAX135CWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 1216MAX135CWI+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX135CWI is determined by strict equivalence across the following critical parameters:

• 15-bit resolution
• 16 samples-per-second sampling rate
• Single differential input configuration
• Multi-slope conversion architecture
• Parallel data interface
• External reference requirement
• ±5V dual supply voltage (both analog and digital rails)
• 28-SOIC package footprint and pinout compatibility
• Surface mount technology

The MAX135CWI+ qualifies as a direct substitute based on identical electrical specifications, package geometry, and functional architecture. The primary distinction between these components is product status and regulatory compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The MAX135CWI+ is the direct functional equivalent of the MAX135CWI. Both components share identical electrical characteristics, pinout configuration, and package specifications, enabling direct substitution at the board level.

Selection between these components should be based on the following factors:

Product Status: The MAX135CWI is obsolete, while the MAX135CWI+ maintains active production status. For new designs or long-term system support, the MAX135CWI+ is the appropriate choice.

Regulatory Compliance: The MAX135CWI+ carries RoHS3 compliance certification, whereas the MAX135CWI is RoHS non-compliant. Applications subject to RoHS regulatory requirements must use the MAX135CWI+.

Supply Chain Availability: The MAX135CWI+ is currently in active production with documented inventory availability. The MAX135CWI, as an obsolete component, faces increasing procurement constraints.

Both components maintain identical REACH and ECCN classifications, ensuring equivalent export and environmental compliance status.

Frequently Asked Questions (FAQ)

Q: Can the MAX135CWI+ be used as a direct replacement for the MAX135CWI in existing designs?

A: Yes. The MAX135CWI+ is electrically and mechanically identical to the MAX135CWI. Pin configuration, package footprint, and functional specifications are equivalent, enabling direct substitution without circuit modification.

Q: What is the primary difference between the MAX135CWI and MAX135CWI+?

A: The MAX135CWI+ is the active production variant with RoHS3 compliance certification. The MAX135CWI is classified as obsolete and does not meet current RoHS standards. Electrical performance and package specifications are identical.

Q: Are there any supply chain considerations when transitioning from MAX135CWI to MAX135CWI+?

A: The MAX135CWI+ is in active production with current inventory availability. The MAX135CWI, as an obsolete component, has limited stock and declining availability. For procurement planning, the MAX135CWI+ is the recommended choice.

Q: Does the 28-SOIC package remain the same for both variants?

A: Yes. Both the MAX135CWI and MAX135CWI+ use the 28-SOIC package with identical 0.295-inch (7.50mm) width specifications. PCB footprints and land patterns are interchangeable.

Q: Are there any differences in operating temperature specifications?

A: No. Both components operate across the identical 0°C to 70°C temperature range with equivalent thermal characteristics.

Q: What supply voltages are required for both components?

A: Both the MAX135CWI and MAX135CWI+ require ±5V dual supply configuration for both analog and digital power rails. External reference voltage is required for operation.