ADM1032ARMZ-002 Equivalent & Substitute Parts

Part Overview

The ADM1032ARMZ-002 is a digital temperature sensor manufactured by onsemi, designed for local and remote temperature monitoring across 0°C to 100°C (local) and 0°C to 120°C (remote) operating ranges. This component features SMBus output, 7-bit resolution, and programmable limit functionality in an 8-MSOP surface mount package. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	ADM1032ARMZ-002
Manufacturer	onsemi
Sensor Type	Digital, Local/Remote
Sensing Temperature - Local	0°C ~ 100°C
Sensing Temperature - Remote	0°C ~ 120°C
Output Type	SMBus
Voltage - Supply	3V ~ 5.5V
Resolution	7 b
Accuracy	±3°C (0°C ~ 100°C)
Features	Output Switch, Programmable Limit, Standby Mode
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the ADM1032ARMZ-002 is determined by the following critical parameters:

Primary Compatibility Criteria:

Digital, Local/Remote sensor type with SMBus interface
8-pin surface mount package (8-MSOP or 8-VSSOP)
Supply voltage range overlap (minimum 3V support required)
Temperature sensing range that encompasses or exceeds the original 0°C ~ 100°C local range
Resolution of 7 bits or higher
Presence of output switch and programmable limit features

Substitution Logic: Parts are grouped into two categories based on operating temperature coverage:

Standard Temperature Range Substitutes (0°C ~ 85°C local): LM86CIMM/NOPB, LM86CIMMX/NOPB, LM90CIMM/NOPB, LM90CIMMX/NOPB. These maintain the core feature set and package compatibility but operate within a narrower local temperature range than the original part.
Extended Temperature Range Substitutes (-40°C ~ 90°C local): LM95235CIMMX/NOPB, LM95235DIMMX/NOPB, LM95235EIMM/NOPB, LM95235QEIMM/NOPB. These provide broader operating temperature coverage and higher resolution (10-12 bits) while maintaining SMBus compatibility and package form factor.
Wide Temperature Range Substitute (-40°C ~ 125°C local): EMC1422-2-ACZL-TR. This Microchip part offers the widest operating range with 11-bit resolution and enhanced accuracy (±1°C).

Parameter Comparison

Part Number	Manufacturer	Local Temp Range	Remote Temp Range	Supply Voltage	Resolution	Accuracy	Package	Product Status
ADM1032ARMZ-002	onsemi	0°C ~ 100°C	0°C ~ 120°C	3V ~ 5.5V	7 b	±3°C	8-MSOP	Obsolete
EMC1422-2-ACZL-TR	Microchip Technology	-40°C ~ 125°C	-64°C ~ 191°C	3V ~ 3.6V	11 b	±1°C (±2°C)	8-MSOP	Active
LM86CIMM/NOPB	Texas Instruments	0°C ~ 85°C	0°C ~ 85°C	3V ~ 3.6V	7 b (Local), 10 b (Remote)	±3°C	8-VSSOP	Obsolete
LM86CIMMX/NOPB	Texas Instruments	0°C ~ 85°C	0°C ~ 85°C	3V ~ 3.6V	7 b (Local), 10 b (Remote)	±3°C	8-VSSOP	Active
LM90CIMM/NOPB	National Semiconductor	0°C ~ 85°C	0°C ~ 85°C	3V ~ 3.6V	7 b (Local), 10 b (Remote)	±4°C	8-VSSOP	Active
LM90CIMMX/NOPB	National Semiconductor	0°C ~ 85°C	0°C ~ 85°C	3V ~ 3.6V	7 b (Local), 10 b (Remote)	±4°C	8-VSSOP	Active
LM95235CIMMX/NOPB	Texas Instruments	0°C ~ 90°C	0°C ~ 90°C	3V ~ 3.6V	10 b (Local), 12 b (Remote)	±2°C	8-VSSOP	Active
LM95235DIMMX/NOPB	Texas Instruments	-40°C ~ 90°C	-40°C ~ 90°C	3V ~ 3.6V	10 b	±2°C (±6°C)	8-VSSOP	Active
LM95235EIMM/NOPB	National Semiconductor	-40°C ~ 90°C	-40°C ~ 90°C	3V ~ 3.6V	10 b (Local), 12 b (Remote)	±2°C (±6°C)	8-VSSOP	Active
LM95235QEIMM/NOPB	Texas Instruments	-40°C ~ 85°C	-40°C ~ 85°C	3V ~ 3.6V	10 b (Local), 12 b (Remote)	±2°C (±6°C)	8-VSSOP	Active

Engineering Selection Recommendations

For Direct Replacement (Active Product Status Priority):

LM86CIMMX/NOPB and LM90CIMMX/NOPB are the most direct substitutes, maintaining identical local temperature range (0°C ~ 85°C), matching accuracy (±3°C for LM86, ±4°C for LM90), and active product status. Both are RoHS3 compliant and available in high inventory quantities. The LM86CIMMX/NOPB is preferred due to matching ±3°C accuracy specification.

For Extended Operating Range Applications:

LM95235QEIMM/NOPB provides automotive-grade qualification (AEC-Q100) with -40°C ~ 85°C local range and superior ±2°C accuracy. This part is suitable for applications requiring broader temperature coverage and higher precision. LM95235DIMMX/NOPB and LM95235EIMM/NOPB extend the range to -40°C ~ 90°C with equivalent accuracy specifications.

For Maximum Temperature Coverage:

EMC1422-2-ACZL-TR from Microchip Technology offers the widest operating range (-40°C ~ 125°C local, -64°C ~ 191°C remote) with superior 11-bit resolution and ±1°C accuracy. This part is active and RoHS3 compliant, suitable for applications requiring extreme temperature monitoring capability.

Supply Voltage Consideration:

The original ADM1032ARMZ-002 supports 3V ~ 5.5V. All substitute parts operate within 3V ~ 3.6V range. Verify system supply voltage compatibility before selection. If 5V operation is required, no direct substitute exists within this parts list.

Frequently Asked Questions (FAQ)

Q: Can LM86CIMMX/NOPB directly replace ADM1032ARMZ-002 in existing designs?

A: LM86CIMMX/NOPB is functionally compatible for applications operating within 0°C ~ 85°C local temperature range. Both parts feature SMBus interface, 8-MSOP package, ±3°C accuracy, and identical feature sets (output switch, programmable limit, standby mode). The primary difference is supply voltage range: LM86CIMMX/NOPB operates at 3V ~ 3.6V versus the original 3V ~ 5.5V. Verify your system supply voltage before implementation.

Q: What is the difference between LM86 and LM90 series?

A: Both LM86 and LM90 series maintain identical temperature ranges (0°C ~ 85°C local), package form factor, and SMBus interface. The primary distinction is accuracy specification: LM86 series specifies ±3°C while LM90 series specifies ±4°C. For applications requiring tighter accuracy tolerance, LM86CIMMX/NOPB is the preferred choice.

Q: Why do LM95235 parts have higher resolution than the original ADM1032ARMZ-002?

A: LM95235 series components feature 10-bit local and 12-bit remote resolution compared to the 7-bit resolution of ADM1032ARMZ-002. Higher resolution provides finer temperature measurement granularity. This enhancement is backward compatible with SMBus protocol and does not require design modifications. Applications can utilize the additional resolution or ignore it without functional impact.

Q: Is EMC1422-2-ACZL-TR suitable for all applications requiring ADM1032ARMZ-002?

A: EMC1422-2-ACZL-TR is functionally compatible for SMBus-based temperature monitoring applications. It provides superior specifications: wider operating range (-40°C ~ 125°C local), higher resolution (11 bits), and better accuracy (±1°C). The primary consideration is supply voltage: EMC1422-2-ACZL-TR operates at 3V ~ 3.6V. Verify compatibility with your system power supply before selection.

Q: What packaging differences exist between substitute parts?

A: All substitute parts use 8-pin surface mount packages: either 8-MSOP or 8-VSSOP form factor. Both packages maintain 0.118" (3.00mm) width and are mechanically compatible with standard PCB layouts designed for the original ADM1032ARMZ-002. Pin configuration and SMBus protocol remain consistent across all listed substitutes.

Q: Are all substitute parts RoHS compliant?

A: LM86CIMMX/NOPB, LM95235CIMMX/NOPB, LM95235DIMMX/NOPB, LM95235EIMM/NOPB, LM95235QEIMM/NOPB, and EMC1422-2-ACZL-TR are all RoHS3 compliant. LM90CIMM/NOPB and LM90CIMMX/NOPB do not specify RoHS status in provided documentation. Verify RoHS compliance requirements for your application before final part selection.

Q: Which substitute part offers the best accuracy?

A: EMC1422-2-ACZL-TR provides the highest accuracy specification at ±1°C (±2°C across full range). LM95235 series parts offer ±2°C accuracy (±6°C at temperature extremes). LM86 and LM90 series maintain ±3°C and ±4°C accuracy respectively. Select based on your application's temperature measurement precision requirements.

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