MAX1241BESA 12-Bit SAR ADC Equivalent & Substitute Parts

Part Overview

The MAX1241BESA 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 operates with external voltage reference and communicates via SPI interface. The device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. Active alternatives with identical electrical and mechanical specifications are available from the same manufacturer family.

Substiute Parts

MAX1241BESA

Analog Devices Inc./Maxim IntegratedIn Stock: 2691MAX1241BESA Datasheet

Current PartRFQ

MAX1241BESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2294MAX1241BESA+ Datasheet

DirectRFQ

MAX1241AESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1458MAX1241AESA+ Datasheet

Parametric EquivalentRFQ

MAX1241CESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1063MAX1241CESA+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX1241BESA is determined by strict equivalence across all electrical and mechanical parameters. The substitute parts MAX1241BESA+, MAX1241AESA+, and MAX1241CESA+ maintain identical specifications in the following critical areas:

• 12-bit resolution and 73 kSPS sampling rate
• Single-ended single-channel input configuration
• SPI digital interface protocol
• SAR architecture with external reference
• Dual supply voltage range (2.7V to 5.25V for both analog and digital rails)
• Operating temperature range of -40°C to 85°C
• 8-SOIC surface mount package with identical physical dimensions

All substitute parts are manufactured by Analog Devices Inc./Maxim Integrated and share the same base product number (MAX1241). Substitution is valid when these parameters remain unchanged in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

The MAX1241BESA is obsolete and no longer in active production. Direct replacement with MAX1241BESA+ is the primary recommendation, as it maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. This variant is available in tube packaging format.

MAX1241AESA+ and MAX1241CESA+ are parametric equivalents suitable for applications where the original MAX1241BESA specifications are required. Both variants are active products with ROHS3 compliance certification. Selection among the three active alternatives (MAX1241BESA+, MAX1241AESA+, MAX1241CESA+) should be based on inventory availability and procurement lead times, as all three are electrically and mechanically interchangeable.

All substitute parts carry REACH Unaffected status and EAR99 export classification, matching the regulatory profile of the original device.

Frequently Asked Questions (FAQ)

Q: Can MAX1241AESA+ or MAX1241CESA+ be used as direct replacements for MAX1241BESA?

A: Yes. All three active variants (MAX1241BESA+, MAX1241AESA+, MAX1241CESA+) are parametric equivalents with identical electrical specifications, sampling rate, resolution, input configuration, supply voltage ranges, operating temperature, and 8-SOIC package dimensions. They are pin-compatible and functionally interchangeable.

Q: What is the difference between MAX1241BESA and MAX1241BESA+?

A: The primary differences are product status and compliance. MAX1241BESA is obsolete and RoHS non-compliant. MAX1241BESA+ is an active product with ROHS3 compliance and is supplied in tube packaging. Electrical and mechanical specifications are identical.

Q: Are there any packaging differences between the substitute parts?

A: All substitute parts use 8-SOIC surface mount packaging with identical physical dimensions (0.154" width, 3.90mm). The main packaging difference is the distribution format: MAX1241BESA+ is supplied in tubes, while the original MAX1241BESA packaging format is unspecified. This does not affect PCB assembly compatibility.

Q: What supply voltage range does this ADC support?

A: Both analog and digital supply voltages operate within the range of 2.7V to 5.25V. The device supports dual independent supply rails within this specification.

Q: Is this a single-channel or multi-channel ADC?

A: The MAX1241 series is a single-channel ADC with one single-ended input. It is not suitable for applications requiring simultaneous multi-channel sampling.

Q: What is the SPI interface protocol for this device?

A: The device communicates via SPI digital interface. Refer to the device datasheet for specific timing, clock frequency, and data format requirements.