ADM1023: System Temperature Sensor, ACPI-Compliant, High Accuracy
The ADM1023 is a 2-channel digital thermometer and under- and overtemperature alarm for use in personal computers and other systems requiring thermal monitoring and management. Optimized for the Pentium® III, the higher accuracy allows systems designers to safely reduce temperature guard banding and increase system performance. The device can measure the temperature of a microprocessor using a diode-connected PNP transistor, which may be provided on-chip with the Pentium III or similar processors; or it can be a low-cost, discrete NPN/PNP device such as the 2N3904/2N3906. A novel measurement technique cancels out the absolute value of the transistor's base emitter voltage so that no calibration is required. The second measurement channel measures the output of an on-chip temperature sensor to monitor the temperature of the device and its environment.
Features- On-chip and remote temperature sensing
- Offset registers for system calibration
- 1°C accuracy and resolution on local channel
- 0.125°C resolution/1°C accuracy on remote channel
- Programmable over/under temperature limits
- Programmable over/under temperature limits
- 2-wire SMBus serial interface
- 200 µA max operating current (0.25 conversions/second)
- 1 µA standby current
- 3 V to 5.5 V supply
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Applications | End Products- Notebook and Desktop Computers
- Servers
- Game Consoles
- RFID Readers
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Package Drawings (1)
| Document Title | Document ID/Size | Revision |
|---|
| QSOP-16 | 492-01 (58.5kB) | A |
Data Sheets (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| ADM1023ARQZ | Last Shipments | Pb-free
Halide free | QSOP-16 | 492-01 | 1 | Tube | 98 | |
| ADM1023ARQZ-R7 | Last Shipments | Pb-free
Halide free | QSOP-16 | 492-01 | 1 | Tape and Reel | 1000 | |
| ADM1023ARQZ-REEL | Active | Pb-free
Halide free | QSOP-16 | 492-01 | 1 | Tape and Reel | 2500 | $4.3332 |
Specifications
| Product | Sensor Type | Data Transmission Standard | ICC Max (mA) | VCC Min (V) | VCC Max (V) | T Min (°C) | T Max (°C) | Temperature Error (°C) |
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| ADM1023ARQZ-REEL | Local & Remote | SMBus | 0.2 | 3 | 5.5 | 0 | 120 | ±1 |
