DS1722U/T&R Equivalent & Substitute Parts

Part Overview

The DS1722U/T&R 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. The device operates on supply voltages between 1.8V and 5.5V, offering programmable resolution and shutdown mode capabilities in an 8-TSSOP/8-MSOP surface mount package.

This part is currently listed as obsolete. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring digital temperature sensing with these specific electrical and mechanical characteristics.

Key Parameters

Parameter	Value
Sensor Type	Digital, Local
Sensing Temperature Range	-55°C ~ 120°C
Resolution	11 bits
Output Type	SPI
Supply Voltage	1.8V ~ 5.5V, 2.65V ~ 5.5V
Accuracy	±2°C (-40°C ~ 85°C), ±3°C (-55°C ~ 120°C)
Operating Temperature	-55°C ~ 125°C
Package Type	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
Features	One-Shot, Programmable Resolution, Shutdown Mode

Substitute Part Grouping Explanation

Substitution of the DS1722U/T&R is determined by strict equivalence across the following critical parameters:

Sensor Type & Temperature Range: Digital local temperature sensing with identical -55°C to 120°C measurement capability
Resolution & Output Protocol: 11-bit resolution with SPI interface for direct functional compatibility
Supply Voltage Compatibility: Matching voltage operating ranges (1.8V ~ 5.5V and 2.65V ~ 5.5V)
Accuracy Specifications: Identical accuracy ratings across specified test conditions
Package & Mounting: 8-TSSOP/8-MSOP surface mount package with matching physical dimensions
Electrical Features: Presence of one-shot mode, programmable resolution, and shutdown mode functionality

The substitute part DS1722U+T&R maintains complete electrical and mechanical equivalence to the main part number, with the primary distinction being packaging format (Cut Tape & Digi-Reel® versus Tape & Reel).

Parameter Comparison

Parameter	DS1722U/T&R (Main)	DS1722U+T&R (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Sensor Type	Digital, Local	Digital, Local
Sensing Temperature Range	-55°C ~ 120°C	-55°C ~ 120°C
Resolution	11 bits	11 bits
Output Type	SPI	SPI
Supply Voltage	1.8V ~ 5.5V, 2.65V ~ 5.5V	1.8V ~ 5.5V, 2.65V ~ 5.5V
Accuracy	±2°C (±3°C)	±2°C (±3°C)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Package Type	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP
Mounting Type	Surface Mount	Surface Mount
Features	One-Shot, Programmable Resolution, Shutdown Mode	One-Shot, Programmable Resolution, Shutdown Mode
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

The DS1722U+T&R serves as the direct functional equivalent to the obsolete DS1722U/T&R. Selection of the substitute part is justified on the following grounds:

Product Status: The DS1722U+T&R maintains active product status, ensuring ongoing manufacturer support, availability, and supply chain continuity compared to the obsolete main part number.

Regulatory Compliance: The substitute part achieves ROHS3 compliance, whereas the main part is RoHS non-compliant. This distinction is significant for applications subject to RoHS directives and environmental regulations.

Electrical & Mechanical Equivalence: All critical parameters—sensor type, temperature range, resolution, output protocol, supply voltage, accuracy, operating temperature, package type, and functional features—are identical between the two parts.

Packaging Consideration: The packaging format differs (Cut Tape & Digi-Reel® versus Tape & Reel), which may affect procurement quantities and handling procedures but does not impact electrical or mechanical compatibility.

For new designs or component replacement requiring digital temperature sensing with the specified electrical characteristics, the DS1722U+T&R is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Are DS1722U/T&R and DS1722U+T&R electrically identical?

A: Yes. Both parts share identical sensor type, temperature range (-55°C to 120°C), 11-bit resolution, SPI output, supply voltage ranges, accuracy specifications, operating temperature, and functional features (one-shot mode, programmable resolution, shutdown mode).

Q: What is the difference between these two part numbers?

A: The primary differences are product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), and packaging format (Tape & Reel versus Cut Tape & Digi-Reel®). Electrical and mechanical specifications are equivalent.

Q: Can DS1722U+T&R be used as a direct replacement in existing designs?

A: Yes, provided the design accommodates the packaging format difference. The Cut Tape & Digi-Reel® packaging may require different handling and procurement procedures compared to standard Tape & Reel, but the component itself is functionally and mechanically compatible.

Q: Does the RoHS3 compliance of DS1722U+T&R affect compatibility?

A: No. ROHS3 compliance is a regulatory advantage and does not impact electrical or mechanical compatibility. The substitute part meets or exceeds the environmental standards of the original part.

Q: What package types are supported?

A: Both parts use 8-TSSOP and 8-MSOP surface mount packages with 0.118" width and 3.00mm dimensions. Package compatibility is maintained between the two part numbers.

Q: Are there any supply voltage differences?

A: No. Both parts operate across identical supply voltage ranges: 1.8V ~ 5.5V and 2.65V ~ 5.5V.

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