AD7840KP Equivalent & Substitute Parts

Part Overview

The AD7840KP is a 14-bit Digital to Analog Converter (DAC) manufactured by Analog Devices Inc., designed for data acquisition applications requiring voltage output conversion. This component features a single DAC channel with R-2R architecture, supporting both parallel and serial data interfaces with external or internal reference options. The AD7840KP is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, legacy design maintenance, and component procurement planning.

Substiute Parts

AD7840KP

Analog Devices Inc.In Stock: 2096AD7840KP Datasheet

Current PartRFQ

AD7840KPZ

Analog Devices Inc.In Stock: 2114AD7840KPZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD7840KP is determined by strict equivalence across the following critical parameters:

• Resolution: 14-bit conversion capability
• DAC Channels: Single converter configuration
• Output Architecture: Voltage-buffered output with R-2R topology
• Settling Time: 4µs maximum
• Data Interface: Support for both parallel and serial protocols
• Reference Configuration: Dual reference capability (external and internal)
• Supply Voltage: ±5V analog supply requirement
• Accuracy Specifications: INL/DNL within ±1 LSB and ±0.9 LSB respectively
• Package Compatibility: 28-PLCC surface mount form factor
• Temperature Range: 0°C to 70°C operational window

The AD7840KPZ qualifies as a direct substitute based on complete parameter alignment across all electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The AD7840KPZ is the direct equivalent substitute for the AD7840KP. Both components share identical electrical specifications and mechanical packaging, ensuring pin-for-pin compatibility and functional interchangeability in existing circuit designs.

The primary distinction between these parts is product lifecycle status: the AD7840KP is obsolete, while the AD7840KPZ maintains active production status. The AD7840KPZ additionally carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for new designs and manufacturing operations.

For applications requiring the AD7840KP, the AD7840KPZ provides continued component availability with equivalent performance characteristics and enhanced regulatory compliance. No circuit modifications or design changes are required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the AD7840KPZ directly replace the AD7840KP without circuit modifications?

A: Yes. The AD7840KPZ is a direct pin-for-pin and functionally equivalent substitute. All electrical parameters, timing specifications, and package dimensions are identical. No circuit redesign is necessary.

Q: What is the primary reason to substitute the AD7840KP with the AD7840KPZ?

A: The AD7840KP is classified as obsolete, limiting long-term component availability. The AD7840KPZ maintains active production status, ensuring reliable procurement for current and future manufacturing requirements.

Q: Are there any compliance differences between these parts?

A: The AD7840KPZ carries ROHS3 compliance certification, meeting current environmental regulations. The AD7840KP compliance status is not specified. For applications subject to RoHS requirements, the AD7840KPZ is the appropriate selection.

Q: Do both parts use the same 28-PLCC package?

A: Yes. Both the AD7840KP and AD7840KPZ utilize the identical 28-PLCC (11.51x11.51) surface mount package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What are the critical electrical parameters that define substitution eligibility?

A: Substitution is based on matching 14-bit resolution, single DAC channel configuration, 4µs settling time, ±5V supply voltage, ±1 LSB INL and ±0.9 LSB DNL accuracy, R-2R architecture, and support for both parallel and serial data interfaces with external and internal reference options.