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Product Detailed Parameters
- Description：IC SENSOR TEMP DUAL3/5.5V 16QSOP
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR)
- Function：Temp Monitoring System (Sensor)
- Sensor Type：Internal and External
- Sensing Temperature：0°C ~ 100°C, External Sensor
- Accuracy：±3°C Local(Max), ±5°C Remote(Max)
- Topology：ADC, Comparator, Multiplexer, Register Bank
- Output Type：SMBus
- Output Alarm：Yes
- Output Fan：No
- Voltage - Supply：3V ~ 5.5V
- Operating Temperature：0°C ~ 100°C
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：16-SSOP (0.154", 3.90mm Width)
- Supplier Device Package：16-QSOP
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Overview
The ADM1021AARQZ-R7 is a two-channel digital thermometer and undertemperature/overtemperature alarm manufactured by onsemi. It features an on-chip sensor with ±1°C accuracy and a remote sensor channel with ±3°C to ±5°C accuracy. The device operates on a 3 V to 5.5 V supply, drawing 200 μA max in active mode and 1 μA in standby. It utilizes a 2-wire SMBus interface for communication and configuration. The component is housed in a small 16-lead QSOP package.
Feature Summary
- Dual-channel temperature monitoring using on-chip and remote diode-connected sensors
- SMBus serial interface supporting programmable overtemperature and undertemperature limits
- Low power consumption with dedicated standby mode and ALERT output interrupt capability
Applications
- Desktop computers
- Notebook computers
- Smart batteries
- Industrial controllers
- Telecom equipment
Procurement Notes
Verify the specific suffix R7 indicates reel packaging when sourcing. Confirm current availability status as distribution channels may list this part as discontinued or limited stock. Ensure the ordering code matches the exact QSOP-16 package requirement for your PCB layout.
Selection Notes
Select this component for systems requiring thermal management of microprocessors or discrete transistors. It is suitable where SMBus compatibility is required for system monitoring. Consider the 16-lead QSOP footprint during schematic capture. Verify that the operating voltage range aligns with the target system power rails.
Part Context
This part belongs to the ADM1021 family of low-cost microprocessor system temperature monitors. It serves as an alternative to the original ADM1021 with updated specifications. The device integrates analog-to-digital conversion and limit comparison logic into a single integrated circuit designed for board-mount applications.
Replacement Considerations
The ADM1021 is pin-compatible but offers different measurement ranges and default register values. Verify if negative temperature sensing is required before substituting.
