Overview
The ADM1032ARMZ-2R, produced by onsemi, is a dual-channel digital thermometer designed for remote and local system temperature monitoring. It is particularly suited for use in PCs and thermal management systems. This device can measure the temperature of a remote thermal diode, such as those found on processor dies or discrete devices, with an accuracy of 1°C. Additionally, it measures its ambient temperature. The ADM1032 communicates via a 2-wire serial interface compatible with System Management Bus (SMBus) standards, allowing for the programming of under/overtemperature limits and the generation of alerts when these limits are exceeded.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage, VDD | 3.0 | 3.30 | 5.5 | V | |
| Average Operating Supply Current, ICC | 0.0625 Conversions/Sec Rate | 170 | 215 | μA | |
| Standby Mode | 5.5 | 10 | μA | ||
| Undervoltage Lockout Threshold VDD Input | Rising Edge | 2.35 | 2.55 | 2.8 | V |
| Power-On Reset Threshold | 1.0 | 2.4 | V | ||
| Local Sensor Accuracy | 0 ≤ TA ≤ 100°C, VCC = 3 V to 3.6 V | ±1 | ±3 | °C | |
| Remote Diode Sensor Accuracy | 60°C ≤ TD ≤ 100°C, VCC = 3 V to 3.6 V | ±1 | ±3 | °C | |
| Remote Sensor Source Current High Level | 230 | μA | |||
| Conversion Time | One-shot mode with averaging on | 35.7 | ms | ||
| Open-Drain Digital Outputs (THERM, ALERT) | Output Low Voltage, VOL IOUT = −6.0 mA | 0.4 | V |
Key Features
- On-chip and Remote Temperature Sensing
- Offset Registers for System Calibration
- 0.125°C Resolution/1°C Accuracy on Remote Channel
- 1°C Resolution/3°C Accuracy on Local Channel
- Fast (Up to 64 Measurements Per Second)
- 2-wire SMBus Serial Interface
- Supports SMBus Alert
- Programmable Under/Overtemperature Limits
- Programmable Fault Queue
- Overtemperature Fail-safe THERM Output
- Programmable THERM Limits and Hysteresis
- Low Operating Current (170 μA) and Standby Current (5.5 μA)
- Supply Voltage Range: 3.0 V to 5.5 V
- Small 8-lead SOIC and MSOP Packages
- Pb-Free Devices
Applications
- Desktop and Notebook Computers
- Thermal Management Systems
- PCs and Server Systems
Q & A
- What is the primary function of the ADM1032ARMZ-2R?
The primary function of the ADM1032ARMZ-2R is to monitor both local and remote temperatures in systems, particularly in PCs and thermal management systems.
- What is the accuracy of the remote temperature measurement?
The remote temperature measurement has an accuracy of ±1°C.
- What communication interface does the ADM1032ARMZ-2R use?
The device communicates via a 2-wire serial interface compatible with System Management Bus (SMBus) standards.
- Can the under/overtemperature limits be programmed?
Yes, the under/overtemperature limits can be programmed into the device over the SMBus.
- What is the purpose of the ALERT output?
The ALERT output signals when the on-chip or remote temperature measurement is out of range and can be used as an interrupt or as a SMBus alert.
- What is the resolution of the local temperature sensor?
The local temperature sensor has a resolution of 1°C.
- What is the operating supply current of the device?
The average operating supply current is 170 μA.
- What is the standby current of the device?
The standby current is 5.5 μA.
- What are the available package types for the ADM1032ARMZ-2R?
The device is available in small 8-lead SOIC and MSOP packages.
- Is the ADM1032ARMZ-2R Pb-Free?
Yes, the device is Pb-Free.
