MAX502BENG Equivalent & Substitute Parts

Part Overview

The MAX502BENG 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 device features a single DAC channel with external reference capability and R-2R architecture, operating across a wide temperature range of -40°C to 85°C. The MAX502BENG is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

MAX502BENG

Analog Devices Inc./Maxim IntegratedIn Stock: 1121MAX502BENG Datasheet

Current PartRFQ

AD7845AQ

Analog Devices Inc.In Stock: 3669AD7845AQ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX502BENG is determined by strict equivalence across the following critical parameters:

• Resolution & Channel Count: 12-bit resolution with single DAC channel
• Settling Time: 5µs maximum
• Output Configuration: Voltage output with buffering
• Interface Type: Parallel data interface
• Reference Architecture: External reference requirement
• Analog Supply Range: Compatibility within ±11.4V ~ 15.75V envelope
• Linearity Specifications: INL/DNL ±1 LSB maximum
• Temperature Range: -40°C ~ 85°C operation
• Package Compatibility: 24-pin DIP form factor with 0.300" (7.62mm) pitch

The AD7845AQ meets all electrical and functional requirements for direct substitution, with the primary distinction being package variant (24-CDIP versus 24-PDIP) and product status transition from obsolete to active.

Parameter Comparison

Engineering Selection Recommendations

The AD7845AQ is the manufacturer-recommended substitute for the MAX502BENG. Selection of this alternative is justified on the following basis:

Functional Equivalence: All critical electrical parameters—resolution, settling time, output type, data interface, reference architecture, linearity specifications, and operating temperature range—are identical between the two devices.

Supply Voltage Consideration: The AD7845AQ analog supply range (±14.25V ~ 15.75V) is a subset of the MAX502BENG range (±11.4V ~ 15.75V). Systems operating the MAX502BENG at supply voltages below ±14.25V require verification of circuit compatibility before substitution.

Package Compatibility: Both devices utilize 24-pin through-hole DIP packages with identical 0.300" (7.62mm) pitch, enabling direct socket replacement without PCB modification.

Regulatory & Compliance Status: The AD7845AQ carries ROHS3 compliance and active product status, providing long-term availability and regulatory alignment compared to the obsolete MAX502BENG.

Frequently Asked Questions (FAQ)

Q: Can the AD7845AQ directly replace the MAX502BENG in existing designs?

A: Yes, for systems operating within the overlapping analog supply range (±14.25V ~ 15.75V). The identical pin configuration, electrical specifications, and package dimensions enable direct substitution. Designs utilizing supply voltages below ±14.25V require circuit verification.

Q: What is the primary difference between the MAX502BENG and AD7845AQ?

A: The devices are electrically equivalent. The AD7845AQ differs in package variant (24-CDIP versus 24-PDIP), product status (active versus obsolete), and regulatory compliance (ROHS3 compliant versus non-compliant). Both packages are mechanically compatible.

Q: Are there any pinout differences between these devices?

A: No. Both the MAX502BENG and AD7845AQ utilize identical 24-pin DIP pinouts with 0.300" (7.62mm) pitch, permitting direct socket replacement.

Q: What supply voltage range should be used when substituting with the AD7845AQ?

A: The AD7845AQ operates within ±14.25V ~ 15.75V for analog supply. If the original design operates at supply voltages between ±11.4V and ±14.25V, circuit-level verification is required to confirm AD7845AQ functionality at those lower voltages.

Q: Is the AD7845AQ available in the same packaging as the MAX502BENG?

A: Both devices are available in 24-pin through-hole DIP packages with identical pitch. The AD7845AQ is supplied in 24-CDIP packaging, which is mechanically and electrically compatible with the 24-PDIP variant of the MAX502BENG.

Q: What is the inventory status of these parts?

A: The MAX502BENG is obsolete with 1081 units in stock. The AD7845AQ is an active product with 3564 units in stock, providing superior long-term availability.