DS1722S Equivalent & Substitute Parts

Part Overview

The DS1722S is a digital temperature sensor manufactured by Analog Devices Inc./Maxim Integrated, designed for local temperature measurement across a -55°C to 120°C range with 11-bit resolution and SPI output interface. The device operates on supply voltages between 1.8V and 5.5V, offering programmable resolution, one-shot capability, and shutdown mode functionality in an 8-SOIC surface mount package.

The DS1722S is classified as obsolete, which necessitates identification of equivalent substitute components for new designs and ongoing production requirements. Active alternatives with identical electrical and mechanical specifications are available to ensure design continuity and supply chain reliability.

Substiute Parts

DS1722S

Analog Devices Inc./Maxim IntegratedIn Stock: 1889DS1722S Datasheet

Current PartRFQ

DS1722S+

Analog Devices Inc./Maxim IntegratedIn Stock: 1272DS1722S+ Datasheet

DirectRFQ

DS1722S+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 3222DS1722S+T&R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS1722S are determined by strict equivalence across all critical electrical and mechanical parameters. The substitution criteria are based on the following parameters that must remain identical:

• Sensor type (Digital, Local)
• Sensing temperature range (-55°C ~ 120°C)
• Resolution (11 bits)
• Output interface (SPI)
• Supply voltage range (1.8V ~ 5.5V, 2.65V ~ 5.5V)
• Accuracy specification (±2°C / ±3°C)
• Operating temperature range (-55°C ~ 125°C)
• Package and case specification (8-SOIC, 0.154", 3.90mm Width)
• Mounting type (Surface Mount)
• Functional features (One-Shot, Programmable Resolution, Shutdown Mode)

Substitute parts may differ only in packaging format (tube vs. cut tape) and product status (active vs. obsolete), as these variations do not affect electrical performance or mechanical compatibility in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both DS1722S+ and DS1722S+T&R are direct electrical and mechanical equivalents to the DS1722S. Selection between these substitutes should be based on the following factors:

DS1722S+ (Tube Packaging): Suitable for applications requiring standard tube packaging format. This variant maintains active product status with ROHS3 compliance, providing long-term supply chain availability and regulatory alignment for new designs.

DS1722S+T&R (Cut Tape Packaging): Appropriate for automated assembly processes utilizing cut tape feeding systems. This variant also maintains active product status with ROHS3 compliance and offers the highest current inventory availability.

The transition from the obsolete DS1722S to either active substitute ensures compliance with current RoHS3 regulations while maintaining identical electrical performance and mechanical compatibility. No circuit modifications or design changes are required when substituting these parts.

Frequently Asked Questions (FAQ)

Q: Are DS1722S+, DS1722S+T&R, and DS1722S electrically identical?

A: Yes. All three parts share identical electrical specifications including sensor type, temperature range, resolution, output interface, supply voltage, accuracy, and operating temperature. They are direct functional equivalents.

Q: What is the difference between DS1722S+ and DS1722S+T&R?

A: The primary difference is packaging format. DS1722S+ uses tube packaging, while DS1722S+T&R uses cut tape (CT) packaging. Both are active products with ROHS3 compliance. Selection depends on assembly process requirements.

Q: Can I use DS1722S+ or DS1722S+T&R as a direct replacement for DS1722S in existing designs?

A: Yes. Both substitutes are pin-compatible and electrically equivalent. No PCB modifications, firmware changes, or circuit redesign are necessary. The parts can be used interchangeably in the same application.

Q: Why is the DS1722S classified as obsolete?

A: The DS1722S has been superseded by active variants (DS1722S+ and DS1722S+T&R) that offer improved compliance status and ongoing supply chain support. The substitute parts provide identical functionality with current manufacturing and regulatory compliance.

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

A: Yes. The DS1722S is RoHS non-compliant, while both DS1722S+ and DS1722S+T&R are ROHS3 compliant. For new designs and applications subject to RoHS regulations, the active substitutes are required.

Q: Which substitute should I select for high-volume production?

A: DS1722S+T&R (cut tape format) is recommended for high-volume automated assembly due to its compatibility with tape feeding systems and current inventory availability. DS1722S+ (tube format) is suitable for lower-volume or manual assembly processes.

Q: Are the 8-SOIC packages identical across all three parts?

A: Yes. All three parts use the same 8-SOIC package specification (0.154", 3.90mm Width) with identical pin assignments and mechanical dimensions. PCB footprints and assembly processes remain unchanged.