DAC7621EB/1K Equivalent & Substitute Parts

Part Overview

The DAC7621EB/1K is a 12-bit digital-to-analog converter manufactured by Texas Instruments, housed in a 20-SSOP surface mount package. This device features a single voltage output with internal reference and parallel data interface, designed for applications requiring precision analog signal generation from digital inputs. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system redesign, legacy product updates, or inventory management.

Substiute Parts

DAC7621EB/1K

Texas InstrumentsIn Stock: 860DAC7621EB/1K Datasheet

Current PartRFQ

DAC8562FSZ-REEL

Analog Devices Inc.In Stock: 2352DAC8562FSZ-REEL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DAC7621EB/1K is determined by the following critical parameters:

• Resolution and Converter Count: 12-bit single D/A converter configuration
• Output Characteristics: Voltage output with buffered configuration
• Interface Type: Parallel data interface
• Supply Voltage Compatibility: Dual 5V supply (analog and digital)
• Accuracy Specifications: INL/DNL performance within acceptable tolerance
• Architecture: R-2R ladder network
• Temperature Range: -40°C to 85°C operation
• Package Compatibility: Surface mount configuration with pin-compatible or functionally equivalent packaging

The DAC8562FSZ-REEL from Analog Devices Inc. meets these substitution criteria as an active product with matching electrical specifications and compatible operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The DAC8562FSZ-REEL qualifies as a functional substitute for the DAC7621EB/1K based on matching core electrical specifications: 12-bit resolution, single converter configuration, buffered voltage output, parallel interface, internal reference, and identical supply voltage requirements. Both devices operate across the -40°C to 85°C temperature range and maintain ROHS3 compliance with equivalent moisture sensitivity ratings.

The primary distinction is product status: the DAC7621EB/1K is obsolete while the DAC8562FSZ-REEL is active, ensuring ongoing availability and manufacturing support. The substitute exhibits slightly relaxed accuracy specifications (±0.75 LSB INL/DNL versus ±0.25 LSB) and extended settling time (16µs versus 7µs), which must be evaluated against application requirements. Package geometry differs (20-SOIC versus 20-SSOP), requiring PCB layout modification but maintaining surface mount compatibility.

Frequently Asked Questions (FAQ)

Q: Can the DAC8562FSZ-REEL directly replace the DAC7621EB/1K without circuit modification?

A: Electrical substitution is feasible due to matching supply voltages, interface type, and output configuration. However, package geometry differs (20-SOIC versus 20-SSOP), necessitating PCB footprint redesign. Pin functionality alignment must be verified against device datasheets before implementation.

Q: What are the accuracy trade-offs when substituting to the DAC8562FSZ-REEL?

A: The substitute exhibits INL/DNL of ±0.75 LSB compared to ±0.25 LSB for the original part. This represents a three-fold increase in linearity error. Applications with stringent accuracy requirements must evaluate whether this specification change is acceptable for the intended function.

Q: How does settling time difference impact system performance?

A: The DAC8562FSZ-REEL has a typical settling time of 16µs versus 7µs for the DAC7621EB/1K. This 9µs difference affects the maximum update rate and signal bandwidth. High-speed applications requiring rapid analog output transitions should assess whether the extended settling time meets timing constraints.

Q: Are there compliance and regulatory considerations for substitution?

A: Both devices maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 ECCN classification. Moisture sensitivity levels are equivalent (MSL 3, 168 hours). No regulatory barriers exist for substitution from a compliance perspective.

Q: What is the significance of the DAC8562FSZ-REEL being an active product?

A: Active product status ensures continued manufacturing, availability through authorized distributors, and ongoing technical support from Analog Devices Inc. The obsolete status of the DAC7621EB/1K creates supply constraints and eliminates manufacturer support, making transition to an active equivalent necessary for long-term system sustainability.