DAC7800LP Equivalent & Substitute Parts

Part Overview

The DAC7800LP is a 12-bit digital-to-analog converter manufactured by Texas Instruments, designed for data acquisition applications requiring dual D/A conversion channels. This component features current output with external reference capability and operates across industrial temperature ranges. The part is actively produced and maintains full RoHS3 compliance. Substitute parts are identified when equivalent electrical specifications and functional performance can be maintained while accommodating different packaging or mounting requirements.

Substiute Parts

DAC7800LP

Texas InstrumentsIn Stock: 1060DAC7800LP Datasheet

Current PartRFQ

DAC7800KU

Texas InstrumentsIn Stock: 3085DAC7800KU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The DAC7800KU qualifies as a direct substitute for the DAC7800LP based on the following critical parameters:

• Resolution and Channel Count: Both parts provide 12-bit resolution with dual D/A converters
• Electrical Performance: Identical settling time (800ns), output type (current - unbuffered), data interface (SPI), and supply voltages (5V analog and digital)
• Operating Range: Both support -40°C to 85°C temperature operation
• Compliance: Both maintain ROHS3 compliance and REACH unaffected status
• Base Product: Both derive from the DAC7800 base product family

The primary difference is packaging: DAC7800LP uses 16-DIP through-hole mounting, while DAC7800KU uses 16-SOIC surface-mount packaging. This distinction allows selection based on PCB assembly requirements and board layout constraints.

Parameter Comparison

Engineering Selection Recommendations

Both DAC7800LP and DAC7800KU are active products with full regulatory compliance. Selection between these parts depends on assembly methodology and board design:

DAC7800LP (16-DIP Through Hole): Select for applications using through-hole assembly, prototype boards, or designs requiring manual component placement and rework accessibility.

DAC7800KU (16-SOIC Surface Mount): Select for high-density PCB layouts, automated surface-mount assembly processes, or applications where board space optimization is required.

Both parts maintain identical electrical specifications and functional performance within the specified operating parameters. Compliance certifications (ROHS3, REACH unaffected, EAR99 ECCN classification) are equivalent across both variants.

Frequently Asked Questions (FAQ)

Q: Can DAC7800KU replace DAC7800LP in existing designs?

A: Electrical and functional compatibility is complete. Physical replacement requires PCB redesign to accommodate 16-SOIC surface-mount footprint instead of 16-DIP through-hole. Schematic connections remain identical.

Q: Are the INL/DNL specifications identical between these parts?

A: INL/DNL specifications differ slightly. DAC7800LP specifies ±0.5 LSB (INL) and ±1 LSB (DNL) maximum. DAC7800KU specifies ±1 LSB for both parameters. Both meet the same functional linearity requirements for 12-bit conversion applications.

Q: What is the difference in architecture between these parts?

A: DAC7800LP uses R-2R architecture, while DAC7800KU uses Multiplying DAC architecture. Both deliver identical settling time (800ns) and output characteristics for the specified operating conditions.

Q: Are moisture sensitivity levels a concern for substitution?

A: DAC7800LP lists MSL as Not Applicable. DAC7800KU specifies MSL 3 (168 Hours), indicating standard surface-mount handling requirements. This affects storage and assembly procedures but does not impact electrical performance or long-term reliability in deployed applications.

Q: Can these parts be used interchangeably in production?

A: Interchangeability requires matching PCB assembly capabilities. Through-hole and surface-mount processes are distinct manufacturing flows. Design and assembly process must align with the selected package type.