MAX1240ACSA 12-Bit SAR ADC Equivalent & Substitute Parts

Part Overview

The MAX1240ACSA 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 or internal voltage references and communicates via SPI interface. The device is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications requiring compatible 12-bit SAR ADC functionality in 8-SOIC packaging.

Substiute Parts

MAX1240ACSA

Analog Devices Inc./Maxim IntegratedIn Stock: 1901MAX1240ACSA Datasheet

Current PartRFQ

MAX1240ACSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1072MAX1240ACSA+ Datasheet

DirectRFQ

MAX1240BCSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2922MAX1240BCSA+ Datasheet

Parametric EquivalentRFQ

MAX1240CCSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1010MAX1240CCSA+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX1240ACSA are qualified based on identical electrical and mechanical parameters: 12-bit resolution, 73 kSPS sampling rate, single-ended input configuration, SAR architecture, SPI data interface, external/internal reference capability, 2.7V to 3.6V supply voltage range, 0°C to 70°C operating temperature, and 8-SOIC package format. All substitute parts maintain the same pinout, signal timing, and functional interface specifications. Substitution is valid across all variants within the MAX1240 base product family when these parameters remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

MAX1240BCSA+ and MAX1240CCSA+ are preferred substitutes for new designs and production continuity. Both variants maintain active product status with Analog Devices Inc./Maxim Integrated, ensuring long-term availability and technical support. Both are RoHS3 compliant and REACH unaffected, meeting modern regulatory requirements. MAX1240ACSA+ provides an intermediate option with RoHS3 compliance but obsolete status.

For applications requiring regulatory compliance with environmental standards, MAX1240BCSA+ or MAX1240CCSA+ are the appropriate selections. The choice between B and C variants depends on specific application requirements not differentiated by the provided electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can MAX1240BCSA+ directly replace MAX1240ACSA in existing designs?

A: Yes. Both parts share identical electrical specifications (12-bit resolution, 73 kSPS sampling rate, SPI interface, 2.7V–3.6V supply voltage, 0°C–70°C operating temperature) and 8-SOIC package format. Pin configuration and signal timing are equivalent.

Q: What is the difference between MAX1240ACSA and MAX1240ACSA+?

A: The primary difference is packaging format (bulk versus tube) and RoHS compliance status. MAX1240ACSA+ is RoHS3 compliant, while MAX1240ACSA is RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Are MAX1240BCSA+ and MAX1240CCSA+ functionally interchangeable?

A: Yes. Both variants are parametrically equivalent with identical 12-bit resolution, 73 kSPS sampling rate, SPI interface, supply voltage range, operating temperature, and 8-SOIC package. Selection between variants should be based on application-specific requirements and availability.

Q: Why is MAX1240ACSA marked as obsolete?

A: Obsolete status indicates the part is no longer in active production. MAX1240BCSA+ and MAX1240CCSA+ are active alternatives that provide equivalent functionality with current manufacturing support.

Q: Does packaging format affect electrical performance?

A: No. Tube and bulk packaging formats do not affect electrical performance or functional characteristics. Packaging selection is based on handling, storage, and assembly process requirements.

Q: Are all substitute parts REACH compliant?

A: Yes. All listed parts (MAX1240ACSA, MAX1240ACSA+, MAX1240BCSA+, MAX1240CCSA+) are REACH unaffected.