MAX1284BESA 12-Bit SAR ADC Equivalent & Substitute Parts

Part Overview

The MAX1284BESA is a 12-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc./Maxim Integrated. This single-channel data acquisition IC features an internal reference, SPI digital interface, and operates from dual 5V supplies across an industrial temperature range of -40°C to 85°C. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

MAX1284BESA

Analog Devices Inc./Maxim IntegratedIn Stock: 2093MAX1284BESA Datasheet

Current PartRFQ

MAX1284BESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 3466MAX1284BESA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX1284BESA is determined by strict equivalence across the following critical parameters:

• Resolution & Sampling Rate: 12-bit resolution at 400 kSPS
• Channel Configuration: Single-channel, single-ended input
• Digital Interface: SPI protocol compatibility
• Converter Architecture: SAR topology with internal reference
• Supply Voltages: Dual 5V (analog and digital)
• Operating Temperature: -40°C to 85°C industrial range
• Package & Pinout: 8-SOIC form factor with identical pin configuration

The MAX1284BESA+ meets all these criteria and qualifies as a direct functional equivalent. The primary distinction between these parts is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The MAX1284BESA+ is the direct equivalent for the obsolete MAX1284BESA. Both devices share identical electrical specifications, pin configuration, and package geometry, ensuring drop-in compatibility at the circuit board level.

Product Status Consideration: The MAX1284BESA is classified as obsolete with limited inventory availability (2,080 units). The MAX1284BESA+ maintains active product status with higher inventory (3,400 units), providing superior long-term supply chain reliability.

Compliance & Certification: The MAX1284BESA+ achieves ROHS3 compliance and maintains REACH unaffected status, aligning with modern regulatory requirements. The original MAX1284BESA is RoHS non-compliant. For applications subject to environmental or procurement standards, the MAX1284BESA+ is the preferred selection.

Packaging & Logistics: The MAX1284BESA+ is supplied in tube packaging, facilitating automated assembly processes and inventory management compared to unspecified packaging for the original part.

Frequently Asked Questions (FAQ)

Q: Can MAX1284BESA+ be used as a direct replacement for MAX1284BESA in existing designs?

A: Yes. The MAX1284BESA+ is electrically and mechanically identical to the MAX1284BESA. Pin configuration, package dimensions (8-SOIC, 0.154" width), and all functional parameters are equivalent. No circuit modifications are required.

Q: What is the difference between MAX1284BESA and MAX1284BESA+?

A: The devices are functionally identical. The primary differences are product lifecycle status (obsolete vs. active), RoHS compliance certification (non-compliant vs. ROHS3 compliant), and packaging format (unspecified vs. tube). The "+" designation indicates the active, compliant variant.

Q: Are there any compatibility concerns with the 8-SOIC package?

A: No. Both parts use the identical 8-SOIC package with 0.154" (3.90mm) width. PCB footprints, solder reflow profiles, and assembly processes are fully compatible.

Q: Why should I select MAX1284BESA+ over MAX1284BESA?

A: The MAX1284BESA+ offers superior supply chain availability (active product status), regulatory compliance (ROHS3), and standardized packaging (tube format). These factors reduce procurement risk and support long-term system sustainability.

Q: What are the critical parameters for substitution compatibility?

A: Substitution requires equivalence in resolution (12-bit), sampling rate (400 kSPS), single-channel single-ended input configuration, SPI interface, SAR architecture, internal reference, 5V dual supply operation, and 8-SOIC package geometry. All these parameters are identical between MAX1284BESA and MAX1284BESA+.