ADM1032ARMZ-2 Equivalent & Substitute Parts

Part Overview

The ADM1032ARMZ-2 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 operates on 3V to 5.5V supply voltage. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	ADM1032ARMZ-2
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
Operating Temperature	0°C ~ 120°C
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ADM1032ARMZ-2 are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Sensor Type: Digital, Local/Remote configuration
Output Type: SMBus interface
Package / Case: 8-TSSOP or 8-MSOP form factor (0.118", 3.00mm Width)
Mounting Type: Surface Mount
Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Considerations:

Supply Voltage Range: Must overlap with or encompass 3V ~ 5.5V
Temperature Sensing Range: Must cover or exceed the application's required range
Resolution: 7-bit or higher acceptable
Accuracy: ±3°C or better preferred
Features: Output Switch and Programmable Limit required; Standby/Shutdown Mode acceptable

Substitute parts are grouped into two categories: direct functional equivalents with identical or superior specifications, and compatible alternatives with extended temperature ranges or improved accuracy suitable for broader application requirements.

Parameter Comparison

Part Number	Manufacturer	Sensor Type	Local Temp Range	Remote Temp Range	Supply Voltage	Resolution	Accuracy	Package	Product Status
ADM1032ARMZ-2	onsemi	Digital, Local/Remote	0°C ~ 100°C	0°C ~ 120°C	3V ~ 5.5V	7 b	±3°C	8-MSOP	Obsolete
EMC1422-2-ACZL-TR	Microchip Technology	Digital, Local/Remote	-40°C ~ 125°C	-64°C ~ 191°C	3V ~ 3.6V	11 b	±1°C (±2°C)	8-MSOP	Active
LM86CIMM/NOPB	Texas Instruments	Digital, Local/Remote	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	Digital, Local/Remote	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	Digital, Local/Remote	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	Digital, Local/Remote	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	Digital, Local/Remote	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	Digital, Local/Remote	-40°C ~ 90°C	-40°C ~ 90°C	3V ~ 3.6V	10 b	±2°C (±6°C)	8-VSSOP	Active
LM95235EIMM/NOPB	National Semiconductor	Digital, Local/Remote	-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	Digital, Local/Remote	-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 (Identical Specifications): LM86CIMMX/NOPB and LM90CIMMX/NOPB provide the closest functional match with 7-bit local resolution, ±3°C to ±4°C accuracy, and SMBus output. Both are active products with current availability. Note that supply voltage is limited to 3V ~ 3.6V, requiring verification against the original 3V ~ 5.5V specification if 5V operation is required.

For Extended Temperature Range Applications: EMC1422-2-ACZL-TR offers the widest operating range (-40°C ~ 125°C) with superior 11-bit resolution and ±1°C accuracy. This part is actively manufactured and ROHS3 compliant, making it suitable for applications requiring extended temperature monitoring beyond the original ADM1032ARMZ-2 specification.

For Improved Accuracy and Resolution: LM95235 series parts (CIMMX, DIMMX, EIMM, QEIMM variants) provide 10-bit to 12-bit resolution with ±2°C accuracy. The LM95235QEIMM/NOPB includes AEC-Q100 automotive qualification for applications requiring automotive-grade reliability. All LM95235 variants are actively produced and ROHS3 compliant.

Supply Voltage Consideration: The original ADM1032ARMZ-2 operates at 3V ~ 5.5V. All listed substitutes operate at 3V ~ 3.6V. Applications requiring 5V operation must implement appropriate voltage regulation or select alternative parts supporting higher supply voltages.

Frequently Asked Questions (FAQ)

Q: Can LM86CIMMX/NOPB directly replace ADM1032ARMZ-2 in existing designs? A: LM86CIMMX/NOPB is functionally compatible with identical SMBus output, 7-bit local resolution, and ±3°C accuracy. However, the supply voltage range is 3V ~ 3.6V versus the original 3V ~ 5.5V. Verify that your application operates within the 3V ~ 3.6V window before substitution.

Q: What is the key difference between LM90 and LM95235 series? A: LM90 series provides 7-bit local and 10-bit remote resolution with ±3°C to ±4°C accuracy. LM95235 series offers higher resolution (10-bit local, 12-bit remote) with improved ±2°C accuracy and extended temperature ranges. LM95235 is the preferred choice for applications requiring higher measurement precision.

Q: Is EMC1422-2-ACZL-TR suitable for applications below 0°C? A: Yes. EMC1422-2-ACZL-TR operates from -40°C ~ 125°C, extending the lower temperature limit from the original 0°C specification. This part is suitable for applications requiring sub-zero temperature monitoring.

Q: Are all substitute parts ROHS3 compliant? A: LM86CIMMX/NOPB, LM95235 series (CIMMX, DIMMX, EIMM, QEIMM), and EMC1422-2-ACZL-TR are ROHS3 compliant. LM90CIMM/NOPB and LM90CIMMX/NOPB do not list ROHS status in provided specifications.

Q: What is the package compatibility between ADM1032ARMZ-2 and substitutes? A: ADM1032ARMZ-2 uses 8-MSOP packaging. Most substitutes use 8-VSSOP packaging. Both are 8-pin surface mount packages with 0.118" (3.00mm) width, but pin configurations and footprints may differ. Verify PCB layout compatibility before implementation.

Q: Which substitute offers the best accuracy? A: EMC1422-2-ACZL-TR provides ±1°C accuracy (±2°C at extended range), and LM95235 series offers ±2°C accuracy. Both exceed the original ADM1032ARMZ-2 ±3°C specification.

Q: Can I use LM95235QEIMM/NOPB in automotive applications? A: Yes. LM95235QEIMM/NOPB is qualified to AEC-Q100 automotive standards and is actively produced by Texas Instruments, making it suitable for automotive temperature monitoring applications.

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