MAX1240BESA Equivalent & Substitute Parts

Part Overview

The MAX1240BESA 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 component features a Successive Approximation Register (SAR) architecture with SPI digital interface and operates across a 2.7V to 3.6V supply voltage range. The MAX1240BESA is classified as obsolete product status, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Key Parameters

Parameter	Specification
Resolution	12 Bits
Sampling Rate	73 kSPS
Number of Inputs	1
Input Type	Single Ended
Data Interface	SPI
Architecture	SAR
Reference Type	External, Internal
Analog Supply Voltage	2.7V ~ 3.6V
Digital Supply Voltage	2.7V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MAX1240BESA are classified based on strict electrical and mechanical parameter equivalence. All substitute candidates maintain identical specifications across the following critical parameters: 12-bit resolution, 73 kSPS sampling rate, single-ended single input configuration, SPI interface, SAR architecture, external and internal reference capability, 2.7V to 3.6V dual supply voltage range, -40°C to 85°C operating temperature, and 8-SOIC surface mount package.

Substitution grouping is determined by two factors: (1) Direct manufacturer equivalents with identical part number suffixes, and (2) Parametric equivalents with alternative temperature grade or packaging designations. The primary distinction between the main part and substitutes is product status: MAX1240BESA carries obsolete status, while all substitute parts maintain active product status. Additionally, substitute parts comply with ROHS3 standards, whereas the original MAX1240BESA is RoHS non-compliant.

Parameter Comparison

Parameter	MAX1240BESA	MAX1240BESA+	MAX1240AESA+	MAX1240AESA/V+	MAX1240BESA/V+
Resolution (Bits)	12	12	12	12	12
Sampling Rate (kSPS)	73	73	73	73	73
Number of Inputs	1	1	1	1	1
Input Type	Single Ended	Single Ended	Single Ended	Single Ended	Single Ended
Data Interface	SPI	SPI	SPI	SPI	SPI
Architecture	SAR	SAR	SAR	SAR	SAR
Reference Type	External, Internal	External, Internal	External, Internal	External, Internal	External, Internal
Analog Supply (V)	2.7 ~ 3.6	2.7 ~ 3.6	2.7 ~ 3.6	2.7 ~ 3.6	2.7 ~ 3.6
Digital Supply (V)	2.7 ~ 3.6	2.7 ~ 3.6	2.7 ~ 3.6	2.7 ~ 3.6	2.7 ~ 3.6
Operating Temperature (°C)	-40 ~ 85	-40 ~ 85	-40 ~ 85	-40 ~ 85	-40 ~ 85
Package Type	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active
RoHS Compliance	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory (Pcs)	1003	1067	1244	1005	2200

Engineering Selection Recommendations

Direct Substitution Priority: MAX1240BESA+ is the primary direct substitute, offering identical electrical and mechanical specifications with active product status and ROHS3 compliance. This part number maintains the same temperature grade and packaging designation as the original MAX1240BESA while eliminating obsolescence risk.

Parametric Equivalents: MAX1240AESA+ and MAX1240AESA/V+ represent parametric equivalents with alternative temperature grade designations. These parts maintain full electrical compatibility and identical performance characteristics. MAX1240BESA/V+ provides an alternative packaging variant while preserving the original temperature grade.

Compliance Consideration: All substitute parts achieve ROHS3 compliance, addressing regulatory requirements for new production and long-term supply chain sustainability. The original MAX1240BESA, classified as RoHS non-compliant, presents compliance constraints for applications subject to environmental regulations.

Inventory Availability: MAX1240BESA/V+ demonstrates highest inventory availability at 2200 pieces, followed by MAX1240AESA+ at 1244 pieces. These inventory levels support production continuity and reduce lead time risk for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can MAX1240AESA+ directly replace MAX1240BESA in existing designs?

A: Yes. MAX1240AESA+ maintains identical electrical specifications, performance characteristics, and 8-SOIC package configuration. The part number suffix change reflects alternative temperature grade designation but does not affect functional compatibility or pin configuration.

Q: What is the difference between MAX1240BESA+ and MAX1240BESA/V+?

A: Both parts share identical electrical specifications and temperature range (-40°C to 85°C). The "/V+" suffix indicates alternative packaging or tape-and-reel configuration. Electrical performance and pinout remain unchanged.

Q: Why is RoHS3 compliance important for substitute selection?

A: ROHS3 compliance ensures compatibility with environmental regulations and supply chain requirements for applications in regulated markets. The original MAX1240BESA's non-compliant status may restrict use in new designs or applications subject to environmental directives.

Q: Are all substitute parts pin-compatible with MAX1240BESA?

A: Yes. All substitute parts utilize the 8-SOIC package with identical pinout and electrical interface specifications. No PCB layout modifications are required for substitution.

Q: Which substitute part offers the best inventory availability?

A: MAX1240BESA/V+ provides the highest inventory level at 2200 pieces, supporting immediate availability for production requirements.

Q: Can I use MAX1240AESA/V+ in applications requiring the original MAX1240BESA?

A: Yes. MAX1240AESA/V+ maintains full parametric equivalence with identical resolution, sampling rate, supply voltage range, operating temperature, and interface specifications. The alternative temperature grade designation does not affect functional compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message