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Analog Devices Inc. ADM1030ARQ-REEL7
- Part No.:
- ADM1030ARQ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Thermal Management
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADM1030ARQ-REEL7.pdf
- Description:
- TEMP MONITOR AND FAN CONTROL
- Quantity:
- Payment:
- Shipping:
Inventory:32,618
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Product details
Overview
ADM1030ARQ-REEL7 from Analog Devices is a dual-channel SMBus-compatible temperature monitor and PWM fan controller IC for thermal management in computing systems. It integrates local (±1°C accuracy, 0.25°C resolution) and remote diode-based temperature sensing (±1°C, 0.125°C resolution), programmable PWM output (33–100% duty cycle), tach/AIN input for 2-wire or 3-wire fan speed measurement, and fail-safe THERM output for CPU throttling - deployed in notebook PCs and network servers.
For engineers reviewing the ADM1030ARQ-REEL7 datasheet, ADM1030ARQ-REEL7 pinout, ADM1030ARQ-REEL7 application, or ADM1030ARQ-REEL7 equivalent, key selection considerations include its ACPI-compliant automatic fan control loop, SMBus Alert Response Address (ARA) support, 3 V to 5.5 V supply range, 16-pin QSOP package, and dedicated open-drain outputs (THERM, INT, FAN_FAULT, PWM_OUT) requiring external pull-ups.
Technical Context
The ADM1030ARQ-REEL7 implements a chopper-stabilized ΔVBE measurement architecture for remote diode sensing, with internal 180 µA/11 µA current sources and 65 kHz low-pass filtering. Its ADC performs 16-cycle averaging per remote reading (nominal 9.6 ms), delivering 11-bit two's complement temperature data.
It operates as an SMBus slave with hardwired 7-bit address (01011xx, set by ADD pin), supports Read Byte protocol and ARA, and features independent configuration registers for fan speed control (PWM frequency/duty cycle), TMIN/TRANGE limits, offset calibration (±15°C), and interrupt masking - all accessible via serial bus without CPU intervention during automatic mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0 V to 5.5 V - enables direct interface with 3.3 V standby rails and 5 V main supplies in ACPI-compliant systems. |
| Local Temp Accuracy | ±1°C - ensures reliable ambient monitoring for system-level thermal guardbanding reduction. |
| Remote Temp Accuracy | ±1°C (60°C–100°C) - validated for Pentium III substrate transistors and discrete 2N3904 diodes. |
| PWM Duty Cycle Range | 33%–100% - provides smooth, low-acoustic-noise fan speed control without abrupt transitions. |
| Fan Speed Resolution | 8-bit - supports precise RPM feedback for closed-loop thermal regulation (e.g., 4400 RPM nominal at N=1). |
| SMBus Clock Frequency | 10–100 kHz - compatible with standard system management bus timing and glitch immunity (50 ns). |
| Operating Temperature | 0°C to +100°C - qualified for industrial-grade deployment in servers and notebooks. |
| Package | 16-lead QSOP (RQ-16) - surface-mount footprint with θJA = 105°C/W for thermal-aware PCB layout. |
Pinout & Package
ADM1030ARQ-REEL7 is housed in a 16-lead QSOP (RQ-16) package, 3.9 mm × 4.9 mm body size, 1.0 mm max height, 0.635 mm pitch. Pin 1 marked with dot; pins 3, 4, 11, 12 are no-connect (NC). All open-drain outputs require external pull-up resistors (10 kΩ typical for PWM_OUT/THERM/FAN_FAULT/INT; 2.2 kΩ for SDA/SCL).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM_OUT (Pin 1) | Open-drain digital output | Drives fan PWM input; requires pull-up; duty cycle programmable from 33% to 100% for acoustic/noise-sensitive cooling. |
| TACH/AIN (Pin 2) | Reconfigurable analog/digital input | Accepts tach pulses from 3-wire fans or measures voltage across sense resistor for 2-wire fan RPM determination. |
| GND (Pin 5) | System ground reference | Return path for analog and digital circuits; must be low-impedance to minimize noise coupling into D+/D– inputs. |
| VCC (Pin 6) | Power supply input | Accepts 3.0–5.5 V; supports operation from 3.3 V standby rail for thermal monitoring during low-power states. |
| THERM (Pin 7) | Fail-safe open-drain I/O | Asserts low on overtemperature; also accepts external low signal to force full-speed fan - used for hardware-level CPU throttling. |
| FAN_FAULT (Pin 8) | Open-drain fault indicator | Signals stalled or disconnected fan; active-low output requiring pull-up; latched until cleared via SMBus. |
| D– / D+ (Pins 9/10) | Remote diode sensor inputs | Differential pair for ΔVBE measurement; D– biased above GND to reject ground noise; supports up to 1000 pF interconnect capacitance. |
| ADD (Pin 13) | Three-state SMBus address select | Sets LSBs of 7-bit address (01011xx); sampled only at power-up; enables coexistence of multiple ADM1030s on same SMBus. |
| INT (Pin 14) | Programmable open-drain interrupt | Indicates configurable temp/fan faults; supports SMBus Alert Response Address (ARA) for multi-device interrupt arbitration. |
| SDA (Pin 15) | SMBus bidirectional data line | Open-drain I/O; requires 2.2 kΩ pull-up; supports read/write transactions and ARA response. |
| SCL (Pin 16) | SMBus clock input | Asynchronous master-driven clock; requires 2.2 kΩ pull-up; defines timing window for data setup/hold (250 ns/300 ns). |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Fan Speed Control Loop | Self-contained thermal regulation that maintains fan speed based on temperature thresholds without CPU software involvement - critical for lockup resilience. |
| ΔVBE Remote Sensing Architecture | Eliminates device-to-device VBE variation by measuring voltage difference at two current levels - enables accurate, uncalibrated remote diode use in mass production. |
| Programmable Temperature Offsets | 5-bit two's complement offset registers allow ±15°C correction per channel - compensates for PCB thermal gradients or sensor placement errors. |
| SMBus Alert Response Address (ARA) | Enables multi-device interrupt prioritization: when INT asserts, host reads device address from ARA (0001100b), resolving conflicts without polling. |
| Fail-Safe THERM Output | Dedicated hardware-level overtemperature signal that cannot be masked - directly interfaces with CPU THERM# input for immediate clock throttling or shutdown. |
| Shutdown Mode | Reduces supply current to 32–50 mA standby (vs. 1.4–3 mA active) - extends battery life in portable systems during idle periods. |
Applications
| Notebook PC Thermal Management | Network Server Fan Control |
|---|---|
Use Scenario: Real-time monitoring of CPU die temperature (via Pentium III substrate transistor) and motherboard ambient temperature during variable workload conditions. IC Role / Device Role / Timing Role: Dual-channel temperature sensor and autonomous PWM fan controller - replaces discrete analog comparators and microcontroller-based fan logic. Use Value: Enables 1°C guardband reduction per Intel Pentium III specification, increasing sustained CPU performance while maintaining safe junction temperatures. | Use Scenario: Coordinated cooling of dual Xeon processors and high-density memory modules in 1U rack-mounted servers with strict acoustic limits. IC Role / Device Role / Timing Role: SMBus-connected thermal manager providing tach feedback, stall detection, and programmable PWM drive - integrated into platform management controller (PMC) firmware. Use Value: Delivers silent operation via smooth 33–100% PWM control and eliminates fan failure-induced thermal runaway using FAN_FAULT and THERM outputs. |
| Telecom Equipment Thermal Monitoring | Industrial Embedded Controller Cooling |
Use Scenario: Monitoring heat-generating DSPs and power amplifiers in base station radios operating across –20°C to +70°C ambient ranges. IC Role / Device Role / Timing Role: Local + remote temperature monitor with extended range support (–127°C to +127.75°C) and robust noise rejection on D+/D– lines. Use Value: Maintains ±1°C accuracy despite high EMI environments using differential sensing, 65 kHz filtering, and guarded PCB routing - validated per TPC 2–3. | Use Scenario: Fan speed regulation in fan-cooled programmable logic controllers (PLCs) deployed in factory automation cabinets with limited airflow. IC Role / Device Role / Timing Role: Standalone thermal supervisor interfacing with 2-wire fans via sense-resistor AIN mode and reporting RPM via SMBus to host MCU. Use Value: Supports legacy 2-wire fan infrastructure without tach output - converts analog voltage drop across 2 Ω sense resistor into 8-bit digital RPM value. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature monitor and PWM fan controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM1032ARQZ-REEL7 | Enhanced remote accuracy (±0.75°C), added SMBus timeout reset, identical pinout and register map. | Supports tighter thermal margins in next-gen Pentium 4 platforms; backward-compatible firmware upgrade path. | Select when higher remote sensing precision and bus fault recovery are required; drop-in replacement with no layout change. |
| LM96000CIMTX/NOPB | Single-supply 3.3 V operation only; no THERM fail-safe output; uses I²C (not SMBus ARA); different register addressing. | Limited to simpler embedded systems without ACPI compliance or hardware-level CPU throttling needs. | Choose for cost-sensitive designs where SMBus ARA, THERM hardware override, and 3–5.5 V flexibility are not required. |
Compared with ADM1030ARQ-REEL7, ADM1032ARQZ-REEL7 offers improved remote accuracy and bus robustness while maintaining full pin and firmware compatibility, whereas LM96000CIMTX/NOPB sacrifices fail-safe thermal signaling and multi-voltage support for lower BOM cost in non-ACPI applications.
Availability
ADM1030ARQ-REEL7 is available at Aetrix Electronics and suitable for notebook PCs, network servers, and telecommunications equipment requiring stable component supply across extended product lifecycles.
Supply support for ADM1030ARQ-REEL7 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADM1030ARQ-REEL7 belongs to Analog Devices' thermal management IC product line, designed specifically for ACPI-compliant, SMBus-based thermal supervision and autonomous fan control in x86 computing platforms.
FAQ
What is the operating temperature range of the ADM1030ARQ-REEL7?
The ADM1030ARQ-REEL7 is specified for operation from 0°C to +100°C ambient temperature. This range aligns with its target applications in notebook PCs and network servers, and is validated across all key parameters including local/remote temperature accuracy, PWM output stability, and SMBus timing compliance.
Does the ADM1030ARQ-REEL7 support both 3-wire and 2-wire fans?
Yes, the ADM1030ARQ-REEL7 supports both fan types: Pin 2 (TACH/AIN) functions as a digital tach input for 3-wire fans, and can be reprogrammed as an analog input to measure voltage across a sense resistor for RPM calculation in 2-wire fans - enabling flexible cooling solutions without additional circuitry.
How does the ADM1030ARQ-REEL7 achieve ±1°C remote temperature accuracy?
The ADM1030ARQ-REEL7 achieves ±1°C remote accuracy using a chopper-stabilized ΔVBE measurement technique that eliminates process-dependent VBE offsets. It switches between two precision current sources (180 µA/11 µA) on the D+/D– inputs, measures the resulting voltage difference, filters it with a 65 kHz low-pass filter, and averages 16 conversions - all confirmed in the datasheet's TPC 4 and specifications table.
Can the ADM1030ARQ-REEL7 operate from a 3.3 V standby supply?
Yes, the ADM1030ARQ-REEL7 supports 3.0 V to 5.5 V supply voltage, and Pin 6 (VCC) may be connected to a 3.3 V standby rail. This allows continuous thermal monitoring and fan control during system suspend states - a requirement for ACPI S3/S4 compliance and verified in the "POWER SUPPLY" section of the datasheet.
What is the function of the THERM pin on the ADM1030ARQ-REEL7?
The THERM pin on the ADM1030ARQ-REEL7 is a dedicated open-drain fail-safe output that asserts low when temperature exceeds a programmable limit. It also accepts external low signals to force full-speed fan operation - providing hardware-level CPU throttling capability independent of software or SMBus communication, as defined in the Functional Block Diagram and Pin Descriptions.
ADM1030ARQ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Fan Control, Temp Monitor
- Sensor Type:
- Internal and External
- Sensing Temperature:
- 0°C ~ 100°C, External Sensor
- Accuracy:
- ±1°C, ±1°C(Max)
- Topology:
- ADC, Comparator, Multiplexer, Register Bank
- Output Type:
- SMBus
- Output Alarm:
- Yes
- Output Fan:
- Yes
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- 0°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
ADM1030ARQ-REEL7 FAQ
1.How can I place an order for ADM1030ARQ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1030ARQ-REEL7 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 ADM1030ARQ-REEL7 reliable?
The price and inventory of ADM1030ARQ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1030ARQ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM1030ARQ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1030ARQ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1030ARQ-REEL7?
ADM1030ARQ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1030ARQ-REEL7 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 ADM1030ARQ-REEL7?
For technical support, including ADM1030ARQ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1030ARQ-REEL7 requirements.
6.How does Aetrix verify that ADM1030ARQ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM1030ARQ-REEL7 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 ADM1030ARQ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM1030ARQ-REEL7?
All ADM1030ARQ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1030ARQ-REEL7, 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 ADM1030ARQ-REEL7 part is unused and in its original packaging.
Return procedure for ADM1030ARQ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM1030ARQ-REEL7 Tags
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EMC2101-ACZL-TR
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MCP9844T-BE/MNY
Microchip Technology
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EMC2101-R-ACZL-TR
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AMC6821SDBQR
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MAX6604AATA+T
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onsemi
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