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Analog Devices Inc. ADM1032AR-1REEL7
- Part No.:
- ADM1032AR-1REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM1032AR-1REEL7.pdf
- Description:
- SYSTEM TEMPERATURE MONITOR
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
ADM1032AR-1REEL7 from Analog Devices is a dual-channel SMBus-compatible digital temperature monitor IC with ±1°C remote and ±3°C local accuracy, 0.125°C remote resolution, 170 μA operating current, and open-drain ALERT/THERM outputs - used for CPU thermal throttling and fan control in desktop PCs and embedded systems.
For engineers reviewing the ADM1032AR-1REEL7 datasheet, ADM1032AR-1REEL7 pinout, ADM1032AR-1REEL7 application, or ADM1032AR-1REEL7 equivalent, key selection criteria include remote diode sensing capability, programmable THERM hysteresis, SMBus address (0x4C), 8-lead SOIC package, and fail-safe overtemperature response without external calibration.
Technical Context
The ADM1032AR-1REEL7 integrates on-chip and remote (external diode) temperature sensing using a ΔVBE measurement technique with 1.008 ideality factor trimming, eliminating need for VBE calibration. It performs alternating conversions between local and remote channels at up to 64 Hz.
Its SMBus interface supports alert signaling, programmable fault queue depth (1–4), and configurable conversion rate (0.0625–64 Hz). The THERM output asserts low when either local or remote channel exceeds its dedicated THERM limit register value, independent of ALERT masking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Remote Accuracy | ±1°C (60–100°C), ±3°C (0–120°C): enables reliable processor die monitoring without per-unit calibration. |
| Local Accuracy | ±1°C (0–100°C): sufficient for ambient board-level thermal management decisions. |
| Remote Resolution | 0.125°C: supports fine-grained thermal margining and dynamic fan speed control. |
| Supply Voltage | 3.0–5.5 V: compatible with standard 3.3 V and 5 V system rails without level-shifting. |
| Operating Current | 170 μA typical at 3.3 V: minimizes power impact in always-on thermal monitoring applications. |
| SMBus Address | 0x4C (7-bit): fixed address for predictable system integration; ADM1032-2 variant uses 0x4D. |
| Conversion Rate | 0.0625–64 conversions/sec: adjustable trade-off between update latency and power consumption. |
| THERM Output | Open-drain, fail-safe: directly drives CPU throttle input or fan enable line without external logic. |
Pinout & Package
ADM1032AR-1REEL7 is housed in an 8-lead SOIC package (SOIC_N), with exposed pad not present. Pin functions are validated per Analog Devices Rev. E datasheet Figure 3 and Table 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts 3.0–5.5 V; powers internal ADC, SMBus interface, and comparators. |
| D+ (Pin 2) | Remote sensor positive terminal | Connects to collector/base of 2N3904/06 or processor diode anode; biased by internal current source. |
| D− (Pin 3) | Remote sensor negative terminal | Biased ~0.6 V above GND via internal diode; rejects ground noise in noisy environments. |
| THERM (Pin 4) | Fail-safe overtemperature comparator output | Open-drain output asserting low when local or remote temp exceeds THERM limit; requires pull-up to VDD. |
| GND (Pin 5) | Supply ground reference | Common return for analog and digital circuitry; must be low-impedance for accurate remote sensing. |
| ALERT (Pin 6) | Configurable interrupt/alert output | Open-drain SMBus alert or general-purpose interrupt; masked via Configuration Register Bit 7. |
| SDATA (Pin 7) | SMBus bidirectional data line | Open-drain I/O; requires external pull-up; supports read/write of all registers including limits and offsets. |
| SCLK (Pin 8) | SMBus clock input | Asynchronous clock input up to 400 kHz; timing compliant with SMBus v1.1 specifications. |
Key Features
| Feature | Design Value |
|---|---|
| ΔVBE remote sensing | Eliminates need for VBE calibration across diodes or process variations; supports discrete 2N3904/06 or integrated processor diodes. |
| Programmable THERM hysteresis | Adjustable from default 10°C to any value via Register 0x21; prevents chatter during thermal transients near trip point. |
| Remote offset correction | 11-bit two's complement offset register (0x11/0x12) compensates for PCB trace resistance and noise-induced errors. |
| Consecutive fault detection | Configurable fault queue (1–4 measurements) filters spurious alerts in electrically noisy environments. |
| Low-power standby mode | 5.5 μA typical standby current; ADC halted but SMBus remains active for configuration reads/writes. |
| Open-circuit remote sensor detection | Status Register Bit 2 flags D+/D− open condition; prevents false thermal shutdown due to broken sensor connection. |
Applications
| Desktop PC Thermal Management | Notebook CPU Throttling |
|---|---|
|
Use Scenario: Real-time monitoring of CPU die temperature and motherboard ambient temperature in x86-based desktop systems. IC Role / Device Role / Timing Role: Dual-channel temperature sensor providing local (ambient) and remote (processor diode) readings over SMBus to system controller. Use Value: Enables dynamic fan speed control and CPU clock throttling via THERM output, meeting ACPI thermal policy requirements without host software polling. |
Use Scenario: Compact thermal protection for space-constrained notebook platforms with integrated graphics and high-power CPUs. IC Role / Device Role / Timing Role: Fail-safe overtemperature detector triggering immediate CPU frequency reduction or shutdown when remote sensor exceeds programmed THERM limit. Use Value: 170 μA operating current and 5.5 μA standby current minimize battery drain during idle states while maintaining thermal vigilance. |
| Industrial Controller Cabinet Monitoring | Telecom Line Card Temperature Regulation |
|
Use Scenario: Ambient and heatsink temperature supervision in PLC backplanes and motor drive enclosures operating from −40°C to +85°C. IC Role / Device Role / Timing Role: Local sensor measures enclosure air temperature; remote sensor monitors power MOSFET heatsink via discrete diode. Use Value: ±1°C local accuracy and programmable remote offset compensate for thermal gradients and trace resistance, ensuring reliable trip-point consistency. |
Use Scenario: Per-line-card thermal monitoring in carrier-grade telecom switches where hot-swap and redundancy require autonomous fault response. IC Role / Device Role / Timing Role: SMBus-connected sensor feeding temperature data to shelf manager; THERM output directly disables faulty card power stage. Use Value: Open-drain THERM and ALERT outputs interface directly with existing 3.3 V logic; SMBus address 0x4C avoids conflict with other system sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel temperature monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM94022QDCNTQ1 | ±0.7°C remote accuracy, 0.0625°C resolution, automotive AEC-Q100 Grade 1, 6-pin WSON package. | Targeted for automotive under-hood use; lacks THERM output and SMBus alert functionality. | Select when higher remote accuracy and automotive qualification are required; redesign needed for THERM-driven throttling. |
| MAX6642AESA+ | ±2°C remote accuracy, 0.125°C resolution, 12-bit SMBus interface, 8-pin SOIC, no local sensor. | Remote-only sensing; requires separate ambient sensor; different register map and SMBus command set. | Choose when only remote diode monitoring is needed and local sensing is handled elsewhere; verify register compatibility before firmware reuse. |
Compared with LM94022QDCNTQ1 and MAX6642AESA+, the ADM1032AR-1REEL7 uniquely combines local + remote sensing, fail-safe THERM output, and SMBus alert in a single 8-pin SOIC - enabling compact, self-contained thermal management without supplemental logic or sensors.
Availability
ADM1032AR-1REEL7 is available at Aetrix Electronics and suitable for desktop computers, industrial controllers, and telecommunications equipment requiring stable component supply and long-term thermal monitoring reliability.
Supply support for ADM1032AR-1REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM1032 product line delivers dual-channel thermal monitoring ICs designed specifically for PC platform management, smart battery systems, and embedded thermal safety - emphasizing SMBus interoperability, low power, and calibration-free remote diode sensing.
FAQ
What is the SMBus address of the ADM1032AR-1REEL7?
The ADM1032AR-1REEL7 uses a fixed 7-bit SMBus address of 0x4C (1001100b). This differs from the ADM1032-2 variant, which uses 0x4D. The address is hardwired and not user-configurable; no address pins or EEPROM are present on the ADM1032AR-1REEL7 device.
Does the ADM1032AR-1REEL7 require external calibration for remote temperature sensing?
No, the ADM1032AR-1REEL7 does not require external calibration for remote sensing. It employs a ΔVBE measurement technique with factory-trimmed ideality factor (1.008) that cancels absolute VBE variation. Offset registers (0x11/0x12) allow fine-tuning for PCB-level errors, but initial accuracy is achieved without calibration.
What is the function of the THERM output on the ADM1032AR-1REEL7?
The THERM output on the ADM1032AR-1REEL7 is an open-drain comparator output that asserts low when either the local or remote temperature exceeds its respective THERM limit register value. It is fail-safe, requires no software servicing, and directly interfaces with CPU throttle inputs or fan enable lines without additional logic.
Can the ADM1032AR-1REEL7 operate from a 3.3 V supply?
Yes, the ADM1032AR-1REEL7 operates from 3.0 V to 5.5 V, making it fully compatible with 3.3 V systems. At 3.3 V, typical operating current is 170 μA, and all specifications-including remote accuracy (±1°C at 60–100°C) and SMBus timing-are guaranteed per the Rev. E datasheet.
How does the ADM1032AR-1REEL7 detect an open remote sensor?
The ADM1032AR-1REEL7 detects an open remote sensor by monitoring D+ and D− terminals. When an open circuit is detected, Status Register Bit 2 (OPEN1) is set high. This flag persists until the sensor connection is restored and the status register is read, ensuring robust fault reporting in systems with removable or fragile thermal diodes.
ADM1032AR-1REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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
- Features:
- Output Switch, Programmable Limit, Standby Mode
- Accuracy - Highest (Lowest):
- ±3°C
- Test Condition:
- 0°C ~ 100°C
- Operating Temperature:
- 0°C ~ 120°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
ADM1032AR-1REEL7 FAQ
1.How can I place an order for ADM1032AR-1REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1032AR-1REEL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADM1032AR-1REEL7 reliable?
The price and inventory of ADM1032AR-1REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1032AR-1REEL7 is usually 5 days.
3.What payment methods are accepted for ADM1032AR-1REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1032AR-1REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1032AR-1REEL7?
ADM1032AR-1REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1032AR-1REEL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADM1032AR-1REEL7?
For technical support, including ADM1032AR-1REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1032AR-1REEL7 requirements.
6.How does Aetrix verify that ADM1032AR-1REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM1032AR-1REEL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADM1032AR-1REEL7 meets industry standards.
7.What is the process for return or replacement of ADM1032AR-1REEL7?
All ADM1032AR-1REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1032AR-1REEL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADM1032AR-1REEL7 part is unused and in its original packaging.
Return procedure for ADM1032AR-1REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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