MAX1241CESA Equivalent & Substitute Parts

Part Overview

The MAX1241CESA is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated, designed for single-ended input data acquisition applications. This device features a Successive Approximation Register (SAR) architecture with a 73 kSPS sampling rate and operates across a wide supply voltage range of 2.7V to 5.25V for both analog and digital domains. The MAX1241CESA is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Active alternatives within the MAX1241 product family provide direct functional replacement with improved compliance status.

Key Parameters

Parameter	Value
Resolution	12 Bits
Sampling Rate	73 kSPS
Number of Inputs	1
Input Type	Single Ended
Data Interface	SPI
Architecture	SAR
Reference Type	External
Analog Supply Voltage	2.7V ~ 5.25V
Digital Supply Voltage	2.7V ~ 5.25V
Operating Temperature Range	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the MAX1241CESA is determined by strict equivalence across all electrical and mechanical parameters. The substitute parts MAX1241CESA+, MAX1241AESA+, and MAX1241BESA+ are classified as direct or parametric equivalents based on the following criteria:

Critical Parameters for Substitution:

Resolution: 12 bits
Sampling Rate: 73 kSPS
Single-ended input configuration
SPI digital interface
SAR architecture with external reference
Supply voltage range: 2.7V ~ 5.25V (analog and digital)
Operating temperature: -40°C ~ 85°C
Package: 8-SOIC form factor with identical pinout and mechanical dimensions

All substitute parts maintain identical electrical specifications and physical packaging, ensuring pin-for-pin compatibility and functional interchangeability in existing circuit designs.

Parameter Comparison

Parameter	MAX1241CESA	MAX1241CESA+	MAX1241AESA+	MAX1241BESA+
Resolution (Bits)	12	12	12	12
Sampling Rate (kSPS)	73	73	73	73
Number of Inputs	1	1	1	1
Input Type	Single Ended	Single Ended	Single Ended	Single Ended
Data Interface	SPI	SPI	SPI	SPI
Architecture	SAR	SAR	SAR	SAR
Reference Type	External	External	External	External
Analog Supply Voltage	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V
Digital Supply Voltage	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MAX1241CESA+ (Direct Manufacturer Equivalent): This part is the direct successor to the MAX1241CESA with identical electrical and mechanical specifications. It is classified as Active with ROHS3 compliance, making it the primary choice for new designs and production continuity. The tubed packaging format supports standard manufacturing processes.

MAX1241AESA+ and MAX1241BESA+ (Parametric Equivalents): Both parts maintain complete electrical and mechanical equivalence to the MAX1241CESA. These variants are Active products with ROHS3 compliance and represent alternative sourcing options within the MAX1241 product family. Selection between these variants is based on inventory availability and supply chain requirements, as all three substitute parts are functionally interchangeable.

All substitute parts carry REACH Unaffected status and EAR99 export classification, consistent with the original MAX1241CESA specifications.

Frequently Asked Questions (FAQ)

Q: Can MAX1241CESA+ be used as a direct replacement for MAX1241CESA?

A: Yes. MAX1241CESA+ is electrically and mechanically identical to MAX1241CESA. Both devices feature 12-bit resolution, 73 kSPS sampling rate, single-ended input, SPI interface, and 8-SOIC packaging. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. Non-compliant).

Q: What is the difference between MAX1241CESA+, MAX1241AESA+, and MAX1241BESA+?

A: All three parts are parametric equivalents with identical electrical specifications and package dimensions. The letter designation (A, B, C) represents different product variants within the MAX1241 family. Selection is based on availability and supply chain considerations rather than functional differences.

Q: Are these parts pin-for-pin compatible?

A: Yes. All substitute parts use the 8-SOIC package with identical pinout and mechanical dimensions (0.154" width, 3.90mm). No PCB layout modifications are required for substitution.

Q: Does the packaging format (Tube vs. other formats) affect compatibility?

A: No. Packaging format affects handling and storage procedures but does not impact electrical performance or physical compatibility. All substitute parts in tubed packaging are functionally equivalent to the original MAX1241CESA.

Q: What is the significance of RoHS3 compliance on the substitute parts?

A: RoHS3 compliance indicates adherence to current environmental and hazardous substance restrictions. The substitute parts (MAX1241CESA+, MAX1241AESA+, MAX1241BESA+) meet ROHS3 standards, while the original MAX1241CESA is non-compliant. For new production and regulated applications, RoHS3-compliant variants are required.

Q: Can I mix different variants (A, B, C) in the same production batch?

A: Yes. Since all variants maintain identical electrical and mechanical specifications, they are functionally interchangeable. However, design documentation should specify the approved part numbers for traceability and supply chain management.

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