DS1722U Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The DS1722U is a digital temperature sensor manufactured by Analog Devices Inc./Maxim Integrated, designed for local temperature measurement across a range of -55°C to 120°C. This component features 11-bit resolution output via SPI interface and operates on supply voltages between 1.8V and 5.5V. The DS1722U is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

DS1722U

Analog Devices Inc./Maxim IntegratedIn Stock: 1299DS1722U Datasheet

Current PartRFQ

DS1722U+

Analog Devices Inc./Maxim IntegratedIn Stock: 2322DS1722U+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1722U is determined by strict equivalence across the following critical parameters:

• Sensor Type: Digital, Local temperature measurement only
• Temperature Range: -55°C ~ 120°C local sensing capability
• Resolution: 11-bit output precision
• Interface: SPI communication protocol
• Supply Voltage: Compatibility with 1.8V ~ 5.5V and 2.65V ~ 5.5V ranges
• Package: 8-TSSOP/8-MSOP surface mount configuration
• Functional Features: One-Shot mode, Programmable Resolution, Shutdown Mode

Parts meeting all these criteria are classified as direct substitutes. Deviations in any parameter disqualify a component from this category.

Parameter Comparison

Engineering Selection Recommendations

The DS1722U+ serves as the direct functional equivalent to the DS1722U. Both components share identical electrical specifications, temperature sensing capabilities, resolution, interface protocol, and package configuration. The primary distinction lies in product lifecycle status and regulatory compliance.

The DS1722U is classified as obsolete, indicating discontinued manufacturing and limited availability. The DS1722U+ maintains active production status with 2,300 units currently in stock, compared to 1,201 units of the obsolete variant. Additionally, the DS1722U+ achieves ROHS3 compliance, whereas the original DS1722U does not meet RoHS requirements. For applications subject to environmental regulations or requiring long-term component availability, the DS1722U+ is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can DS1722U+ replace DS1722U in existing designs?

A: Yes. The DS1722U+ is electrically and mechanically identical to the DS1722U. Pin configuration, package dimensions, electrical characteristics, and functional features are equivalent. Direct substitution is possible without circuit modification.

Q: What is the difference between DS1722U and DS1722U+?

A: The components are functionally identical. The primary differences are product status (DS1722U is obsolete; DS1722U+ is active production), RoHS compliance (DS1722U+ is ROHS3 compliant), and packaging format (DS1722U+ is supplied in tube packaging). Electrical performance and specifications are unchanged.

Q: Does the package change affect PCB layout?

A: No. Both variants use the same 8-TSSOP/8-MSOP package with 0.118" width and 3.00mm dimensions. PCB footprints, land patterns, and assembly processes remain identical.

Q: Is the DS1722U+ suitable for new product designs?

A: Yes. The DS1722U+ is the recommended choice for new designs. Active production status ensures long-term availability, and ROHS3 compliance satisfies current environmental standards.

Q: What supply voltage range does the substitute support?

A: The DS1722U+ operates on 1.8V ~ 5.5V and 2.65V ~ 5.5V supply ranges, identical to the original DS1722U. Verify your application's specific voltage requirements against these ranges.

Q: Are there any firmware or software changes required when switching to DS1722U+?

A: No. The SPI interface, command set, resolution, and all functional features are identical. Existing firmware and software implementations require no modification.