DAC7800KUG4 Equivalent & Substitute Parts

Part Overview

The DAC7800KUG4 is a 12-bit digital-to-analog converter manufactured by Texas Instruments, featuring dual D/A converters in a 16-SOIC surface mount package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The part operates with 5V analog and digital supply voltages, supports SPI data interface, and utilizes external voltage references with multiplying DAC architecture.

Substiute Parts

DAC7800KUG4

Texas InstrumentsIn Stock: 1433DAC7800KUG4 Datasheet

Current PartRFQ

AD5555CRUZ

Analog Devices Inc.In Stock: 1471AD5555CRUZ Datasheet

MFR RecommendedRFQ

DAC7800KU

Texas InstrumentsIn Stock: 3085DAC7800KU Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DAC7800KUG4 are classified into two categories based on substitution criteria:

Parametric Equivalent (Direct Replacement): The DAC7800KU maintains identical electrical specifications and package format as the DAC7800KUG4. This part shares the same 12-bit resolution, dual converter configuration, 800ns settling time, SPI interface, 5V supply requirements, and 16-SOIC package. The primary distinction is product status (active versus obsolete) and packaging format (tube versus unspecified). This classification permits direct substitution without circuit modification.

Functional Substitute (Design Consideration Required): The AD5555CRUZ from Analog Devices Inc. provides functional substitution with key parameter differences. While maintaining dual D/A converter configuration, SPI interface, 5V supply voltages, external reference type, and identical operating temperature range, the AD5555CRUZ increases resolution to 14 bits and reduces settling time to 500ns (typical). The package format changes from 16-SOIC to 16-TSSOP (0.173", 4.40mm width), requiring PCB layout modification. The AD5555CRUZ is active product status with superior moisture sensitivity rating (MSL 1 versus MSL 3).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification): The DAC7800KU is the appropriate selection when maintaining existing PCB layouts and design specifications. Both parts are ROHS3 compliant and REACH unaffected. The DAC7800KU offers active product status, ensuring long-term availability and supply chain stability compared to the obsolete DAC7800KUG4.

For New Designs or PCB Redesign Scenarios: The AD5555CRUZ provides enhanced performance characteristics with active product status and superior moisture sensitivity rating (MSL 1). The 14-bit resolution and 500ns settling time represent performance improvements over the 12-bit, 800ns specification of the DAC7800KUG4. Implementation requires PCB layout modification due to package format change from 16-SOIC to 16-TSSOP. Both parts maintain identical supply voltage requirements, SPI interface compatibility, and operating temperature range, supporting functional equivalence at the system level.

Frequently Asked Questions (FAQ)

Q: Can the DAC7800KU be used as a direct replacement for the DAC7800KUG4? A: Yes. The DAC7800KU is a parametric equivalent with identical electrical specifications, resolution, settling time, and 16-SOIC package format. No circuit modifications are required.

Q: What are the key differences between the DAC7800KUG4 and AD5555CRUZ? A: The AD5555CRUZ increases resolution from 12 bits to 14 bits and reduces settling time from 800ns to 500ns (typical). The package changes from 16-SOIC to 16-TSSOP, requiring PCB layout modification. Both maintain SPI interface, 5V supply requirements, and external reference type.

Q: Does the AD5555CRUZ require circuit design changes? A: The AD5555CRUZ requires PCB layout modification due to package format change (16-SOIC to 16-TSSOP). The electrical interface remains compatible with SPI protocol, 5V supplies, and external reference configuration. Pin-to-pin compatibility must be verified against specific board layout constraints.

Q: Are all substitute parts ROHS3 compliant? A: Yes. The DAC7800KU and AD5555CRUZ are both ROHS3 compliant and REACH unaffected, matching the compliance status of the DAC7800KUG4.

Q: What is the moisture sensitivity difference between these parts? A: The DAC7800KUG4 and DAC7800KU have MSL 3 rating (168 hours). The AD5555CRUZ has MSL 1 rating (unlimited), indicating superior moisture resistance and reduced handling constraints during storage and assembly.

Q: Which substitute should be selected for production continuity? A: The DAC7800KU is recommended for immediate production continuity, as it provides direct replacement capability without design modification. The AD5555CRUZ is suitable for new production runs where PCB redesign is feasible, offering enhanced performance and improved moisture sensitivity characteristics.