AD7840ARS Equivalent & Substitute Parts

Part Overview

The AD7840ARS is a 14-bit Digital to Analog Converter (DAC) manufactured by Analog Devices Inc., housed in a 24-SSOP surface mount package. This component features voltage-buffered output with parallel and serial data interfaces, supporting both external and internal reference configurations. The AD7840ARS is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

AD7840ARS

Analog Devices Inc.In Stock: 697AD7840ARS Datasheet

Current PartRFQ

AD7840ARSZ

Analog Devices Inc.In Stock: 3469AD7840ARSZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD7840ARS is determined by strict equivalence across the following critical parameters:

• Resolution: 14-bit conversion capability
• Output Configuration: Voltage-buffered output topology
• Data Interface: Support for both parallel and serial communication protocols
• Reference Configuration: Capability for external and internal reference operation
• Electrical Performance: Settling time of 4µs, INL/DNL specifications of ±2 LSB and ±0.9 LSB maximum
• Architecture: R-2R resistor ladder network
• Supply Voltage: ±5V analog supply requirement
• Operating Temperature: -25°C to 85°C range
• Package: 24-SSOP surface mount form factor with 5.30mm width
• Moisture Sensitivity: MSL 1 rating

The AD7840ARSZ qualifies as a direct substitute based on identical electrical specifications, package configuration, and functional characteristics across all parameters listed above.

Parameter Comparison

Engineering Selection Recommendations

The AD7840ARSZ is the direct equivalent substitute for the AD7840ARS. Both components share identical electrical and mechanical specifications across all functional parameters. The primary distinction is product lifecycle status: the AD7840ARS is obsolete, while the AD7840ARSZ maintains active production status.

Selection of the AD7840ARSZ provides the following advantages:

• Continued component availability through active manufacturing
• ROHS3 compliance certification
• REACH regulatory compliance confirmation
• Tube packaging format for standard component handling
• Identical pinout, electrical performance, and package footprint for direct board-level substitution

No functional or performance degradation occurs when replacing AD7840ARS with AD7840ARSZ in existing designs.

Frequently Asked Questions (FAQ)

Q: Can AD7840ARSZ be used as a direct replacement for AD7840ARS?

A: Yes. The AD7840ARSZ is electrically and mechanically identical to the AD7840ARS. All electrical specifications, pin configurations, and package dimensions are equivalent. Direct substitution is possible without design modification.

Q: What is the primary reason to substitute the AD7840ARS?

A: The AD7840ARS is classified as obsolete. The AD7840ARSZ is the active production equivalent, ensuring long-term component availability and supply chain continuity.

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

A: The AD7840ARSZ carries ROHS3 compliance and REACH regulatory confirmation. These certifications apply to the active production variant. Both components share identical electrical performance and package specifications.

Q: Will the AD7840ARSZ fit the same PCB footprint as the AD7840ARS?

A: Yes. Both components use the 24-SSOP package with identical 5.30mm width and pin configuration. No PCB layout modifications are required.

Q: What is the difference between the packaging formats?

A: The AD7840ARS packaging format is not specified in available documentation. The AD7840ARSZ is supplied in Tube packaging, which is standard for component distribution and handling.

Q: Are the electrical specifications identical between both parts?

A: Yes. Resolution (14-bit), settling time (4µs), INL/DNL specifications (±2 LSB / ±0.9 LSB), supply voltage (±5V), operating temperature range (-25°C to 85°C), and all functional parameters are identical.