MAX5442ACUB 16-Bit Digital to Analog Converter Equivalent & Substitute Parts

Part Overview

The MAX5442ACUB is a 16-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 a single DAC channel with R-2R architecture, SPI data interface, and external reference capability. The MAX5442ACUB is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support, design updates, and procurement continuity. Active alternatives with identical electrical and mechanical specifications are available to ensure uninterrupted supply chain access.

Key Parameters

Parameter	Specification
Number of Bits	16
Number of D/A Converters	1
Settling Time	1µs (Typ)
Output Type	Voltage - Unbuffered
Data Interface	SPI
Reference Type	External
Voltage - Supply, Analog	5V
Voltage - Supply, Digital	5V
INL/DNL	±0.5, ±0.5 LSB
Architecture	R-2R
Operating Temperature	0°C ~ 70°C
Package / Case	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the MAX5442ACUB are identified based on strict electrical and mechanical parameter equivalence. The substitution logic is based on the following critical parameters that must remain identical:

16-bit resolution with single DAC channel
1µs typical settling time
Unbuffered voltage output configuration
SPI serial data interface
External reference input requirement
5V analog and digital supply voltages
±0.5 LSB INL/DNL specifications
R-2R resistor ladder architecture
0°C to 70°C operating temperature range
10-TFSOP/10-MSOP surface mount package with 3.00mm width

Substitute parts must maintain identical electrical performance characteristics and physical package dimensions to ensure direct replacement capability without circuit redesign or PCB layout modification.

Parameter Comparison

Parameter	MAX5442ACUB	MAX5442ACUB+	MAX5442BCUB+
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Number of Bits	16	16	16
Number of D/A Converters	1	1	1
Settling Time	1µs (Typ)	1µs (Typ)	1µs (Typ)
Output Type	Voltage - Unbuffered	Voltage - Unbuffered	Voltage - Unbuffered
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, ±0.5	±0.5, ±0.5	±0.5, ±0.5
Architecture	R-2R	R-2R	R-2R
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Not specified	Tube	Tube

Engineering Selection Recommendations

The MAX5442ACUB is obsolete and no longer in active production. Direct substitutes MAX5442ACUB+ and MAX5442BCUB+ are both active products with identical electrical and mechanical specifications, ensuring seamless replacement without circuit modification.

MAX5442ACUB+ is the direct form-fit-function replacement, maintaining the same part number suffix structure as the original component. This variant is ROHS3 compliant and available in tube packaging.

MAX5442BCUB+ is a parametric equivalent offering identical electrical performance and package specifications. This variant is also ROHS3 compliant and available in tube packaging. The "B" grade designation indicates equivalent performance within the same operating temperature range and electrical specifications.

Both substitute parts satisfy modern regulatory compliance requirements (ROHS3) while the original MAX5442ACUB does not. For new designs or system updates, either MAX5442ACUB+ or MAX5442BCUB+ is suitable for direct replacement. Selection between the two substitutes may be determined by availability, lead time, or specific procurement requirements, as both maintain identical functional and physical characteristics.

Frequently Asked Questions (FAQ)

Q: Can MAX5442ACUB+ and MAX5442BCUB+ be used interchangeably with MAX5442ACUB?

A: Yes. Both substitute parts maintain identical electrical specifications (16-bit resolution, 1µs settling time, ±0.5 LSB INL/DNL), identical supply voltages (5V analog and digital), identical SPI interface, and identical package dimensions (10-TFSOP/10-MSOP, 3.00mm width). Direct substitution is possible without circuit redesign or PCB layout modification.

Q: What is the difference between MAX5442ACUB+ and MAX5442BCUB+?

A: Both parts are electrically and mechanically identical. The primary difference is the grade designation: "A" and "B" grades both operate across the 0°C to 70°C temperature range with identical performance specifications. Selection between them is based on availability and procurement preference, as functional performance is equivalent.

Q: Why is the original MAX5442ACUB obsolete?

A: The MAX5442ACUB has been discontinued by the manufacturer. Active production has transitioned to MAX5442ACUB+ and MAX5442BCUB+, which offer the same functionality with improved regulatory compliance (ROHS3).

Q: Are there any compliance differences between the original and substitute parts?

A: Yes. The original MAX5442ACUB is RoHS non-compliant, while both MAX5442ACUB+ and MAX5442BCUB+ are ROHS3 compliant. For applications requiring RoHS compliance, the substitute parts are required.

Q: What packaging options are available for the substitute parts?

A: Both MAX5442ACUB+ and MAX5442BCUB+ are supplied in tube packaging, suitable for automated assembly processes and component handling.

Q: Is the SPI interface identical across all three part numbers?

A: Yes. All three parts (MAX5442ACUB, MAX5442ACUB+, MAX5442BCUB+) use identical SPI serial data interface with external reference input, ensuring software and firmware compatibility without modification.

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