AD7534BQ Equivalent & Substitute Parts

Part Overview

The AD7534BQ is a 14-bit Digital to Analog Converter (DAC) manufactured by Analog Devices Inc., designed for data acquisition applications requiring parallel interface operation with external voltage reference. The device features current output (unbuffered) and R-2R architecture with 1.5µs settling time. The AD7534BQ is classified as obsolete, making identification of compatible substitute parts essential for system redesign, legacy system maintenance, and production continuity. Substitute parts must maintain functional equivalence across critical electrical parameters while accommodating packaging and temperature range differences.

Substiute Parts

AD7534BQ

Analog Devices Inc.In Stock: 2193AD7534BQ Datasheet

Current PartRFQ

AD7534JNZ

Analog Devices Inc.In Stock: 1562AD7534JNZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD7534BQ is based on maintaining functional equivalence across the following critical parameters:

• Resolution: 14-bit conversion capability
• Converter Count: Single D/A converter per package
• Settling Time: 1.5µs maximum
• Output Configuration: Current output, unbuffered topology
• Interface: Parallel data input
• Reference Architecture: External voltage reference requirement
• Converter Architecture: R-2R resistor network
• Supply Voltage Ranges: Analog and digital supply compatibility (11.4V ~ 15.75V)
• Mounting Technology: Through-hole package format
• Base Product Family: AD7534 series

The AD7534JNZ qualifies as a direct substitute based on identical performance across all critical electrical parameters. Differences in operating temperature range, INL specification, and package form factor (20-DIP vs. 20-CDIP) are accommodated within standard engineering practice for legacy component replacement.

Parameter Comparison

Engineering Selection Recommendations

The AD7534JNZ is a qualified substitute for the AD7534BQ based on the following engineering criteria:

Electrical Compatibility: Both devices maintain identical settling time (1.5µs), output type (current, unbuffered), data interface (parallel), reference type (external), and supply voltage ranges (11.4V ~ 15.75V). The 14-bit resolution and R-2R architecture are preserved across both parts.

Product Status Advantage: The AD7534JNZ carries active product status from Analog Devices Inc., ensuring continued availability and manufacturing support, whereas the AD7534BQ is classified as obsolete. This transition is necessary for long-term supply chain reliability.

Compliance and Certifications: The AD7534JNZ includes RoHS3 compliance and REACH unaffected status, providing regulatory alignment for modern manufacturing environments. Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Operating Temperature Consideration: The AD7534BQ operates across -25°C ~ 85°C, while the AD7534JNZ operates across 0°C ~ 70°C. System designs operating below 0°C or above 70°C require thermal analysis to confirm AD7534JNZ suitability.

Linearity Specification: The AD7534BQ specifies ±1 LSB INL maximum, while the AD7534JNZ specifies ±2 LSB INL maximum. Applications requiring ±1 LSB INL performance must evaluate whether the relaxed specification impacts system accuracy.

Package Form Factor: Both devices use 20-pin through-hole packages with identical 0.300" (7.62mm) pitch. The AD7534BQ uses CDIP (ceramic) packaging, while the AD7534JNZ uses PDIP (plastic) packaging. PCB footprints are compatible; thermal and reliability characteristics may differ based on application environment.

Frequently Asked Questions (FAQ)

Q: Can the AD7534JNZ directly replace the AD7534BQ without PCB modifications?

A: Yes, both devices use 20-pin through-hole packages with identical 0.300" (7.62mm) pitch and pin configuration. No PCB layout changes are required. However, verify that your application's operating temperature range falls within 0°C ~ 70°C and that ±2 LSB INL specification meets system accuracy requirements.

Q: What is the difference between CDIP and PDIP packaging?

A: CDIP (ceramic DIP) uses ceramic substrate material, while PDIP (plastic DIP) uses plastic substrate material. Both provide equivalent electrical performance and through-hole mounting compatibility. CDIP typically offers superior thermal performance and reliability in extreme environments; PDIP is standard for commercial and industrial applications.

Q: Why does the AD7534JNZ have a wider INL specification (±2 LSB vs. ±1 LSB)?

A: The relaxed INL specification reflects manufacturing process variations between the obsolete AD7534BQ and the active AD7534JNZ. Both specifications remain within acceptable linearity for 14-bit DAC applications. Evaluate your system's accuracy requirements against the ±2 LSB specification before substitution.

Q: Is the AD7534JNZ suitable for applications requiring -25°C operation?

A: No. The AD7534JNZ operates from 0°C ~ 70°C. Applications requiring operation below 0°C must either retain the AD7534BQ (if available) or identify alternative 14-bit DAC solutions with extended temperature ranges.

Q: Are there any compliance differences between the two parts?

A: The AD7534JNZ includes RoHS3 compliance and REACH unaffected status. The AD7534BQ, being obsolete, may not carry current compliance certifications. Both parts share identical ECCN and HTSUS classifications. Verify compliance requirements with your procurement and regulatory teams.

Q: What is the settling time specification, and is it identical between both parts?

A: Settling time is 1.5µs for both the AD7534BQ and AD7534JNZ. This parameter defines the time required for the output to settle within ±0.5 LSB following a digital input change. Identical settling time ensures equivalent dynamic performance in data acquisition applications.

Q: Can I use the AD7534JNZ in high-temperature applications above 70°C?

A: No. The AD7534JNZ maximum operating temperature is 70°C. Applications requiring operation above 70°C require alternative component selection or thermal management strategies to maintain device temperature within specification.