MAX538ACPA Equivalent & Substitute Parts

Part Overview

The MAX538ACPA is a 12-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring voltage output conversion. This component features an 8-DIP through-hole package and operates with 5V analog and digital supply voltages. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Resolution	12 Bits
Number of D/A Converters	1
Output Type	Voltage - Buffered
Settling Time	25µs (Typ)
Data Interface	SPI
Reference Type	External
Voltage - Supply, Analog	5V
Voltage - Supply, Digital	5V
INL/DNL	±0.5 LSB (Max) / ±1 LSB (Max)
Architecture	R-2R
Operating Temperature Range	0°C ~ 70°C
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Differential Output	No

Substitute Part Grouping Explanation

Substitute parts for the MAX538ACPA are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

Resolution: 12 bits
Output Type: Voltage - Buffered
Data Interface: SPI
Supply Voltages: 5V analog and digital
Package: 8-DIP through-hole
Settling Time: 25µs (Typ)
Architecture: R-2R
INL/DNL specifications: ±0.5 LSB (Max) / ±1 LSB (Max)

The MAX538ACPA+ and MAX539ACPA+ meet all electrical and mechanical requirements for direct substitution. Both parts maintain identical functional specifications, package configuration, and performance characteristics. The primary distinction lies in packaging format (tube) and RoHS compliance status.

Parameter Comparison

Parameter	MAX538ACPA	MAX538ACPA+	MAX539ACPA+
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Resolution (Bits)	12	12	12
Number of D/A Converters	1	1	1
Output Type	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered
Settling Time	25µs (Typ)	25µs (Typ)	25µs (Typ)
Data Interface	SPI	SPI	SPI
Reference Type	External	External	External
Voltage - Supply, Analog	5V	5V	5V
Voltage - Supply, Digital	5V	5V	5V
INL/DNL (LSB)	±0.5 (Max), ±1 (Max)	±0.5 (Max), ±1 (Max)	±0.5 (Max), ±1 (Max)
Architecture	R-2R	R-2R	R-2R
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Obsolete	Obsolete
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both MAX538ACPA+ and MAX539ACPA+ are electrically and mechanically equivalent to the MAX538ACPA. Selection between these alternatives should be based on the following factors:

Compliance Requirements: The MAX538ACPA+ and MAX539ACPA+ are ROHS3 compliant, whereas the original MAX538ACPA is RoHS non-compliant. Systems requiring RoHS compliance must use either substitute part.

Product Status: All three parts share obsolete status, indicating limited future availability. Procurement planning should account for this constraint.

Packaging Format: The MAX538ACPA is supplied in standard packaging, while MAX538ACPA+ and MAX539ACPA+ are supplied in tube packaging. Verify compatibility with assembly and handling equipment.

Base Product Designation: MAX538ACPA+ maintains the MAX538 base product number, while MAX539ACPA+ uses the MAX539 base product number. Both are functionally identical for this application.

Frequently Asked Questions (FAQ)

Q: Can MAX538ACPA+ be used as a direct replacement for MAX538ACPA? A: Yes. The MAX538ACPA+ is electrically and mechanically equivalent, with identical 12-bit resolution, 5V supply requirements, SPI interface, and 8-DIP through-hole package. The primary difference is ROHS3 compliance.

Q: What is the difference between MAX538ACPA+ and MAX539ACPA+? A: Both parts are parametrically equivalent with identical electrical specifications and performance characteristics. The distinction is the base product number (MAX538 versus MAX539). Both are suitable substitutes for the original MAX538ACPA.

Q: Are there any compatibility concerns with the 8-DIP package? A: No. All three parts use the same 8-DIP (0.300", 7.62mm) through-hole package. PCB layouts and socket configurations are directly compatible.

Q: Does the tube packaging of MAX538ACPA+ and MAX539ACPA+ affect functionality? A: No. Packaging format does not affect electrical performance or functionality. Tube packaging is a distribution format and does not impact component operation or compatibility.

Q: Why is RoHS compliance important for this substitution? A: RoHS compliance is a regulatory requirement in many markets. The MAX538ACPA+ and MAX539ACPA+ are ROHS3 compliant, making them suitable for applications requiring regulatory adherence. The original MAX538ACPA is non-compliant and may not meet current procurement standards.

Q: Can these parts be used interchangeably in existing designs? A: Yes. All three parts maintain identical electrical specifications, pin configurations, and performance parameters. No design modifications are required for substitution.

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