AD7948BN Equivalent & Substitute Parts

Part Overview

The AD7948BN is a 12-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc., designed for data acquisition applications requiring parallel interface control with external voltage reference. The device features current output (unbuffered) and operates across industrial temperature ranges (-40°C to 85°C). The AD7948BN is classified as obsolete, making identification of functionally equivalent active alternatives essential for new designs and production continuity.

Substiute Parts

AD7948BN

Analog Devices Inc.In Stock: 1300AD7948BN Datasheet

Current PartRFQ

AD7948BNZ

Analog Devices Inc.In Stock: 1183AD7948BNZ Datasheet

DirectRFQ

AD7945BNZ

Analog Devices Inc.In Stock: 1336AD7945BNZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AD7948BN are identified based on strict electrical and mechanical parameter matching within the data acquisition converter category. The substitution criteria are:

Primary Matching Parameters:

• Resolution: 12 bits
• Number of D/A Converters: 1
• Output Type: Current - Unbuffered
• Data Interface: Parallel
• Reference Type: External
• Settling Time: 600µs (Typical)
• Supply Voltages: 5V (Analog and Digital)
• INL/DNL: ±0.5 LSB (Maximum)
• Architecture: R-2R
• Operating Temperature: -40°C to 85°C
• Package: 20-DIP (0.300", 7.62mm)
• Mounting: Through Hole

Substitute Classification:

Direct Manufacturer Substitute: AD7948BNZ — Identical electrical specifications and package configuration. Differs only in packaging format (Tube vs. standard) and product status (Active vs. Obsolete). Maintains full pin and functional compatibility.

Parametric Equivalent: AD7945BNZ — Meets all electrical and mechanical parameters identically to the main part. Shares the same 12-bit resolution, current output architecture, parallel interface, and 20-DIP package. Classified as parametric equivalent due to different base product number while maintaining complete functional interchangeability.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Production: Select either AD7948BNZ or AD7945BNZ. Both parts are classified as Active products, ensuring long-term availability and supply chain stability. Both comply with ROHS3 and REACH regulations, meeting current environmental and regulatory requirements.

For Legacy System Maintenance: The AD7948BN (Obsolete) can be directly replaced with AD7948BNZ without design modification. The direct manufacturer substitute maintains identical electrical performance and pinout configuration.

For Design Flexibility: AD7945BNZ provides parametric equivalence with identical functional specifications. Selection between AD7948BNZ and AD7945BNZ depends on supply availability and procurement requirements, as both deliver equivalent performance in the application circuit.

Compliance Considerations: Both active substitutes (AD7948BNZ and AD7945BNZ) carry ROHS3 Compliant and REACH Unaffected certifications. The original AD7948BN does not specify these compliance statuses. For applications requiring documented environmental compliance, the active substitutes are preferred.

Frequently Asked Questions (FAQ)

Q: Can AD7948BNZ directly replace AD7948BN without circuit modification? A: Yes. AD7948BNZ is the direct manufacturer substitute with identical electrical specifications, pinout, and package configuration. No circuit changes are required.

Q: What is the difference between AD7948BNZ and AD7945BNZ? A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The difference is the base product number (AD7948 vs. AD7945). Both are Active products suitable for new designs.

Q: Why is the AD7948BN classified as Obsolete? A: The AD7948BN has reached end-of-life status. Active alternatives (AD7948BNZ and AD7945BNZ) are available with identical performance specifications.

Q: Are the substitute parts compatible with the same PCB layout? A: Yes. Both AD7948BNZ and AD7945BNZ use the identical 20-DIP (0.300", 7.62mm) package with Through Hole mounting. PCB layouts designed for AD7948BN require no modification.

Q: Do the substitute parts meet current environmental regulations? A: Yes. Both AD7948BNZ and AD7945BNZ are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards.

Q: What is the settling time specification for all three parts? A: All three parts (AD7948BN, AD7948BNZ, and AD7945BNZ) specify 600µs typical settling time, ensuring identical transient response characteristics.

Q: Can I use either substitute interchangeably in my application? A: Yes. Both AD7948BNZ and AD7945BNZ meet all electrical and mechanical parameters identically. Selection can be based on availability and procurement preference.