AD7225KN Equivalent & Substitute Parts

Part Overview

The AD7225KN is an 8-bit digital-to-analog converter (DAC) with 4 independent channels, designed for data acquisition applications requiring parallel interface operation with external voltage references. The device features buffered voltage output and R-2R architecture, operating across extended temperature ranges from -40°C to 85°C in a 24-DIP package.

The AD7225KN is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system continuity, ensure design flexibility, and support long-term production requirements where original inventory becomes unavailable.

Substiute Parts

AD7225KN

Analog Devices Inc.In Stock: 2146AD7225KN Datasheet

Current PartRFQ

AD7225KNZ

Analog Devices Inc.In Stock: 1030AD7225KNZ Datasheet

DirectRFQ

MAX505BENG+

Analog Devices Inc./Maxim IntegratedIn Stock: 3307MAX505BENG+ Datasheet

SimilarRFQ

MX7225KN+

Analog Devices Inc./Maxim IntegratedIn Stock: 1155MX7225KN+ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AD7225KN are classified based on electrical and mechanical compatibility within the following criteria:

Direct Substitutes maintain identical electrical specifications across all critical parameters: 8-bit resolution, 4 DAC channels, parallel data interface, external reference configuration, R-2R architecture, buffered voltage output, and 24-DIP through-hole packaging. Voltage supply requirements and settling time characteristics must align with the original design specifications.

Similar Substitutes share the same resolution, channel count, interface type, and package form factor but may differ in voltage supply requirements, settling time performance, or operating temperature range. These parts require design verification to confirm compatibility with existing power supply and thermal constraints.

The following parameters determine substitution eligibility:

• Resolution: 8 bits
• Channel Count: 4 independent DAC channels
• Output Configuration: Voltage - Buffered
• Interface: Parallel
• Reference: External
• Package: 24-DIP (0.300", 7.62mm)
• Mounting: Through Hole

Parameter Comparison

Engineering Selection Recommendations

AD7225KNZ is the primary direct substitute for AD7225KN. Both parts are manufactured by Analog Devices Inc. and share identical electrical specifications, including settling time, voltage supply requirements, and temperature range. AD7225KNZ maintains active product status, ensuring continued availability and supply chain reliability. The only difference is packaging format (tube versus bulk), which does not affect electrical performance or functional compatibility.

MX7225KN+ is a direct electrical equivalent with identical settling time and voltage supply specifications. However, the operating temperature range is restricted to 0°C ~ 70°C compared to the original -40°C ~ 85°C specification. This part is suitable only for applications where the narrower temperature range is acceptable. MX7225KN+ maintains active product status.

MAX505BENG+ is a similar substitute sharing the same 8-bit, 4-channel DAC architecture and 24-DIP package. However, it operates on different voltage supplies (±5V analog and 5V digital versus 11.4V ~ 16.5V, -5V for the original) and exhibits longer settling time (6µs typical versus 4µs). This part requires design modification to accommodate different power supply requirements and is classified as obsolete.

For new designs and long-term production, AD7225KNZ is the recommended selection due to active product status and complete electrical equivalence.

Frequently Asked Questions (FAQ)

Q: Can AD7225KNZ be used as a direct replacement for AD7225KN?

A: Yes. AD7225KNZ is electrically and functionally identical to AD7225KN. Both parts feature 8-bit resolution, 4 DAC channels, 4µs settling time, identical voltage supply ranges (11.4V ~ 16.5V, -5V analog; 14.25V ~ 15.75V digital), and -40°C ~ 85°C operating temperature. The only difference is packaging format (tube). No circuit modifications are required.

Q: Is MX7225KN+ compatible with designs requiring -40°C operation?

A: No. MX7225KN+ operates from 0°C ~ 70°C, which does not cover the full -40°C ~ 85°C range of the original AD7225KN. This part is suitable only for applications with operating temperature limits of 0°C to 70°C.

Q: What are the key differences between AD7225KN and MAX505BENG+?

A: MAX505BENG+ differs in three critical areas: (1) voltage supply requirements (±5V analog and 5V digital versus 11.4V ~ 16.5V, -5V), (2) settling time (6µs typical versus 4µs), and (3) product status (obsolete). Circuit redesign is required to accommodate different power supply architecture. This part is not recommended for new applications.

Q: Are all substitute parts available in 24-DIP through-hole packaging?

A: Yes. All substitute parts listed (AD7225KNZ, MX7225KN+, MAX505BENG+) are available in 24-DIP (0.300", 7.62mm) through-hole packaging, maintaining mechanical compatibility with existing PCB designs.

Q: What is the difference between AD7225KN and AD7225KNZ packaging?

A: AD7225KN is supplied in bulk packaging, while AD7225KNZ is supplied in tube packaging. Both parts are electrically identical. Tube packaging provides improved component protection during handling and storage but may have different minimum order quantities depending on supplier requirements.