AD640BPZ Equivalent & Substitute Parts

Part Overview

The AD640BPZ is a logarithmic amplifier integrated circuit manufactured by Analog Devices Inc., designed for precision logarithmic signal processing applications. This device is classified as obsolete, indicating it is no longer in active production. The AD640BPZ operates across a -40°C to 85°C temperature range and is housed in a 20-PLCC (9x9) surface mount package. Due to its obsolete status, identification of functionally equivalent substitute components is necessary for ongoing system support, design updates, and procurement continuity.

Substiute Parts

AD640BPZ

Analog Devices Inc.In Stock: 1475AD640BPZ Datasheet

Current PartRFQ

AD640BE

Analog Devices Inc.In Stock: 842AD640BE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD640BPZ is determined by electrical and mechanical parameter equivalence within the logarithmic amplifier category. The critical parameters governing substitution are:

Electrical Parameters:

• Amplifier Type: Logarithmic (single circuit configuration)
• -3dB Bandwidth: 350 MHz
• Current - Input Bias: 7 µA
• Voltage - Input Offset: 50 µV
• Current - Supply: 35 mA
• Current - Output / Channel: 2.3 mA
• Voltage - Supply Span: 9 V to 15 V
• Operating Temperature Range: -40°C to 85°C

Mechanical Parameters:

• Mounting Type: Surface Mount
• Base Product Number: AD640 (same device family)

Compliance Parameters:

• RoHS3 Compliance
• Moisture Sensitivity Level 1

The AD640BE qualifies as a direct substitute based on identical electrical specifications and compliance certifications. The primary distinction is the package configuration: the AD640BPZ uses a 20-PLCC (9x9) package, while the AD640BE uses a 20-CLCC (8.89x8.89) package. Both packages are surface mount configurations with compatible pinout and footprint geometries suitable for direct replacement in PCB designs.

Parameter Comparison

Engineering Selection Recommendations

The AD640BE is the manufacturer-recommended substitute for the AD640BPZ. Selection of the AD640BE is supported by the following engineering criteria:

Electrical Equivalence: All electrical parameters are identical between the two devices, including bandwidth, bias current, input offset voltage, supply current, output current, and supply voltage range. The operating temperature range is identical at -40°C to 85°C.

Compliance and Certification: Both devices maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), ensuring compatibility with current manufacturing and environmental standards.

Product Status: The AD640BE holds Active product status, ensuring ongoing availability, technical support, and supply chain continuity. The AD640BPZ is classified as Obsolete, making the AD640BE the appropriate long-term solution for new designs and system updates.

Package Compatibility: While the AD640BPZ uses a 20-PLCC (9x9) package and the AD640BE uses a 20-CLCC (8.89x8.89) package, both are surface mount configurations within the same device family (AD640 base product number). PCB layout modifications may be required to accommodate the package geometry difference.

Frequently Asked Questions (FAQ)

Q: Can the AD640BE directly replace the AD640BPZ without circuit modifications?

A: The AD640BE provides electrical equivalence to the AD640BPZ across all specified parameters. However, the package geometry differs (20-PLCC versus 20-CLCC). PCB footprint and layout adjustments are necessary to accommodate the different package dimensions. Once the footprint is updated, the devices are electrically interchangeable.

Q: What is the primary reason for substituting the AD640BPZ?

A: The AD640BPZ is classified as Obsolete, indicating discontinued production. The AD640BE is the manufacturer-recommended active substitute, providing identical electrical performance with assured long-term availability.

Q: Are there any electrical performance differences between the AD640BPZ and AD640BE?

A: No. Both devices share identical specifications for bandwidth (350 MHz), input bias current (7 µA), input offset voltage (50 µV), supply current (35 mA), output current (2.3 mA), and supply voltage range (9 V to 15 V). Operating temperature range is also identical at -40°C to 85°C.

Q: What are the package differences between these two parts?

A: The AD640BPZ is packaged in a 20-PLCC (9x9) configuration, while the AD640BE uses a 20-CLCC (8.89x8.89) package. Both are surface mount packages with compatible pinout. The CLCC package is slightly smaller in overall dimensions.

Q: Are both devices RoHS compliant?

A: Yes. Both the AD640BPZ and AD640BE are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), meeting current environmental and manufacturing standards.

Q: What inventory status should be considered when selecting between these parts?

A: The AD640BPZ has 1433 pieces in stock but is Obsolete. The AD640BE has 808 pieces in stock and is Active. For new designs and long-term system support, the AD640BE is the appropriate selection due to its Active status and assured future availability.