AD526AD Equivalent & Substitute Parts

Part Overview

The AD526AD is a Programmable Gain Amplifier integrated circuit manufactured by Analog Devices Inc., housed in a 16-CDIP through-hole package. This linear amplifier device is classified as Active product status and is ROHS3 compliant. The AD526AD provides single-circuit programmable gain amplification with a slew rate of 24V/µs and -3dB bandwidth of 4 MHz, suitable for precision signal conditioning applications requiring variable gain control. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, packaging preferences, or application-specific requirements.

Substiute Parts

AD526AD

Analog Devices Inc.In Stock: 880AD526AD Datasheet

Current PartRFQ

AD521LDZ

Analog Devices Inc.In Stock: 991AD521LDZ Datasheet

DirectRFQ

AD526ADZ

Analog Devices Inc.In Stock: 1316AD526ADZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AD526AD are identified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is organized as follows:

Direct Package and Amplifier Type Match: The AD526ADZ is a direct equivalent substitute, sharing identical amplifier type (Programmable Gain), package configuration (16-CDIP), electrical specifications (24V/µs slew rate, 4 MHz bandwidth, 50 pA input bias current, 250 µV input offset voltage), and supply voltage range (9V to 33V). The only difference is packaging format (Tube versus unspecified in the main part). This part maintains full electrical and thermal compatibility.

Alternative Amplifier Type with Different Package: The AD521LDZ represents a functional alternative with a different amplifier type (Instrumentation Amplifier versus Programmable Gain) and different package configuration (14-CDIP versus 16-CDIP). This substitute is applicable only when the application requirements permit instrumentation amplifier functionality and the 14-pin package is mechanically compatible with the circuit board layout. Key electrical differences include lower slew rate (10V/µs versus 24V/µs), lower bandwidth (2 MHz versus 4 MHz), higher input bias current (40 nA versus 50 pA), and higher input offset voltage (1 mV versus 250 µV).

Substitution Criteria: Substitution eligibility is determined by the following parameters:

• Amplifier type compatibility with application requirements
• Package / Case physical dimensions and pin count
• Slew rate and bandwidth performance requirements
• Input bias current and offset voltage specifications
• Supply voltage range compatibility
• Operating temperature range requirements
• RoHS and compliance status

Parameter Comparison

Engineering Selection Recommendations

AD526ADZ Selection: The AD526ADZ is the primary direct substitute for the AD526AD. Both parts maintain identical electrical specifications, including 24V/µs slew rate, 4 MHz bandwidth, 50 pA input bias current, and 250 µV input offset voltage. Both operate across the 9V to 33V supply range and support the -40°C to 85°C temperature range. Both are ROHS3 compliant with MSL 1 rating. The AD526ADZ is packaged in Tube format, whereas the AD526AD packaging format is unspecified. Selection of AD526ADZ is appropriate for direct replacement in all applications where the AD526AD is currently specified, with no functional or performance degradation.

AD521LDZ Selection: The AD521LDZ is an alternative substitute applicable only when the application requirements permit functional substitution of an Instrumentation Amplifier for a Programmable Gain Amplifier. This part operates at reduced performance levels: 10V/µs slew rate (versus 24V/µs), 2 MHz bandwidth (versus 4 MHz), and higher input offset voltage (1 mV versus 250 µV). The AD521LDZ operates across a 10V to 36V supply range and supports only 0°C to 70°C operating temperature, which is narrower than the AD526AD range. The 14-CDIP package requires circuit board layout verification for mechanical compatibility. The AD521LDZ is ROHS3 compliant with MSL 1 rating. Selection of AD521LDZ is appropriate only when application specifications explicitly permit reduced slew rate, bandwidth, and offset voltage performance, and when the 14-pin package is mechanically compatible.

Compliance and Status: All three parts (AD526AD, AD526ADZ, and AD521LDZ) maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance.

Frequently Asked Questions (FAQ)

Q: Can AD526ADZ be used as a direct replacement for AD526AD? A: Yes. The AD526ADZ is a direct electrical and functional equivalent. Both parts are Programmable Gain Amplifiers with identical slew rate (24V/µs), bandwidth (4 MHz), input bias current (50 pA), input offset voltage (250 µV), supply voltage range (9V to 33V), and operating temperature range (-40°C to 85°C). The 16-CDIP package is identical. The only difference is packaging format (Tube). No circuit modifications are required.

Q: What are the key differences between AD526AD and AD521LDZ? A: The AD521LDZ differs in three primary aspects: (1) Amplifier type is Instrumentation Amplifier rather than Programmable Gain Amplifier, (2) Package is 14-CDIP rather than 16-CDIP, and (3) Electrical performance is reduced with 10V/µs slew rate (versus 24V/µs), 2 MHz bandwidth (versus 4 MHz), 40 nA input bias current (versus 50 pA), and 1 mV input offset voltage (versus 250 µV). Operating temperature range is also narrower (0°C to 70°C versus -40°C to 85°C).

Q: Is the AD521LDZ suitable for all applications using AD526AD? A: No. The AD521LDZ is suitable only for applications where the reduced slew rate, bandwidth, and offset voltage specifications are acceptable, and where Instrumentation Amplifier functionality meets the application requirements. The narrower operating temperature range (-40°C to 85°C versus 0°C to 70°C) must also be verified. Circuit board layout must accommodate the 14-pin package.

Q: Are all substitute parts ROHS3 compliant? A: Yes. The AD526AD, AD526ADZ, and AD521LDZ are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All parts are suitable for applications with RoHS regulatory requirements.

Q: What is the impact of package differences between 16-CDIP and 14-CDIP? A: The 16-CDIP package has 16 pins, while the 14-CDIP package has 14 pins. Both use 0.300" (7.62mm) row spacing. The different pin counts require verification of circuit board layout compatibility. Pin assignments may differ between the two packages, requiring schematic review before substitution.

Q: Can AD526AD be used in applications requiring lower power consumption? A: The AD526AD draws 10 mA supply current. The AD521LDZ draws 5 mA supply current, offering 50% lower power consumption. However, this substitution is valid only if the reduced electrical performance (slew rate, bandwidth, offset voltage) and narrower operating temperature range are acceptable for the application.

Q: What is the supply voltage compatibility between substitute parts? A: The AD526AD and AD526ADZ both operate across 9V to 33V. The AD521LDZ operates across 10V to 36V. For applications using supply voltages below 10V, only AD526AD or AD526ADZ are suitable. For applications using supply voltages above 33V, only AD521LDZ is suitable.