AD390SD Equivalent & Substitute Parts

Part Overview

The AD390SD is a 12-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc., designed for data acquisition applications requiring four independent voltage output channels. The device features buffered voltage outputs, parallel data interface, and support for both external and internal reference configurations. The AD390SD is classified as obsolete, making identification of functionally equivalent substitute parts essential for system redesign, legacy system maintenance, and component procurement planning.

Substiute Parts

AD390SD

Analog Devices Inc.In Stock: 1158AD390SD Datasheet

Current PartRFQ

AD390TD

Analog Devices Inc.In Stock: 1311AD390TD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AD390SD are identified based on strict equivalence across the following critical parameters:

• Resolution: 12-bit digital-to-analog conversion
• Channel Count: 4 independent D/A converters
• Output Configuration: Voltage output with buffering
• Data Interface: Parallel input
• Reference Support: External and internal reference capability
• Analog Supply Voltage: ±14.6V ~ 16.5V range
• Settling Time: 8µs maximum
• Accuracy: INL/DNL specifications of ±0.25 and ±0.5 LSB
• Package: 28-CDIP through-hole form factor
• Temperature Range: -55°C ~ 125°C operation

The AD390TD qualifies as a direct substitute based on identical electrical specifications, performance characteristics, and physical packaging. Both devices share the same base product number (AD390) and are manufactured by Analog Devices Inc.

Parameter Comparison

Engineering Selection Recommendations

The AD390TD serves as a direct functional equivalent to the AD390SD for applications requiring 12-bit, 4-channel digital-to-analog conversion with buffered voltage outputs. Both devices are classified as obsolete products, indicating that neither is in active production. Selection between these parts should be based on current inventory availability and compliance certifications.

The AD390TD carries RoHS3 compliance and REACH unaffected status, providing regulatory advantages for new designs or systems subject to environmental compliance requirements. The AD390SD does not specify these certifications in the provided data.

For through-hole PCB assembly applications, both devices utilize identical 28-CDIP packaging with 0.600-inch body width, ensuring mechanical and electrical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the AD390TD replace the AD390SD in existing designs?

A: Yes. The AD390TD is electrically and mechanically equivalent to the AD390SD across all specified parameters, including resolution, channel count, settling time, output type, reference configuration, supply voltage, accuracy specifications, operating temperature range, and package form factor.

Q: Are there differences in product status between these parts?

A: Both the AD390SD and AD390TD are classified as obsolete. Neither device is in active production. Component selection should prioritize current inventory availability from authorized distributors.

Q: What is the significance of the RoHS3 and REACH certifications on the AD390TD?

A: RoHS3 compliance indicates the AD390TD meets Restriction of Hazardous Substances Directive requirements for lead-free and restricted substance content. REACH unaffected status indicates the device is not subject to REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulatory requirements. These certifications are relevant for applications in regulated markets or systems with environmental compliance mandates.

Q: Are the 28-CDIP packages identical between both parts?

A: Yes. Both devices use 28-CDIP (0.600", 15.24mm) through-hole packages. PCB footprints, pin assignments, and mounting procedures are identical, requiring no design modifications for substitution.

Q: What parameters determine substitutability for 12-bit DAC applications?

A: Substitutability is determined by matching resolution (12-bit), channel count (4 converters), output configuration (buffered voltage), data interface (parallel), reference support (external/internal), analog supply voltage range (±14.6V ~ 16.5V), settling time (8µs), accuracy (±0.25/±0.5 LSB), operating temperature (-55°C ~ 125°C), and package type (28-CDIP through-hole).