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Analog Devices Inc. ADM1034ARQ-REEL7
- Part No.:
- ADM1034ARQ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Thermal Management
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADM1034ARQ-REEL7.pdf
- Description:
- THERMAL MONITOR AND FAN SPEED (R
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
ADM1034ARQ-REEL7 from Analog Devices is a dual-channel thermal monitor and fan speed (RPM) controller IC with ±1°C local/remote temperature accuracy, SMBus 2.0/1.1/1.0 compliance, and integrated look-up table-based fan control for two cooling fans. It supports remote diode sensing (up to 1 kΩ series resistance cancellation), THERM I/O for PROCHOT timing/assertion, and operates from 3 V to 5.5 V. Used in desktop/notebook PC thermal management subsystems.
For engineers reviewing the ADM1034ARQ-REEL7 datasheet, ADM1034ARQ-REEL7 pinout, ADM1034ARQ-REEL7 application, or ADM1034ARQ-REEL7 equivalent, key selection criteria include dual remote diode support, ±1°C measurement accuracy across −40°C to +100°C, programmable fault queue, SMBus address configuration via LOCATION input, and discrete/linear fan-speed-to-temperature profile modes.
Technical Context
The ADM1034ARQ-REEL7 integrates a 10-bit ADC with dedicated analog front-end for local ambient and two remote thermal diodes, supporting automatic remote channel calibration and series resistance cancellation up to 1 kΩ. Its internal registers include configurable conversion rate (up to 64 Hz), offset compensation (±15.875°C), and THERM % limit/timer for PROCHOT assertion duration monitoring.
It implements dual open-drain fan drive outputs (DRIVE1/DRIVE2) with FAN_FAULT output assertion on stall detection, plus SMBusALERT and THERM pins operating in bidirectional mode-outputting overtemperature interrupts or accepting CPU PROCHOT signals with reference input (REF) on Pin 8. The 8-level LOCATION input determines SMBus version (ARP-capable or fixed-and-discoverable), address (0x50–0x53), and UDID LLL bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Accuracy | ±1°C (local & remote, 20°C–60°C); enables precise thermal throttling without software compensation |
| Remote Diode Support | 2 channels (D1+/D1−, D2+/D2−); monitors CPU/GPU die temps using 2N3904/6 or integrated diodes |
| Fan Control Modes | Linear ramp or discrete-step look-up table; allows quiet operation at low load and aggressive cooling under thermal stress |
| SMBus Interface | 2.0/1.1/1.0 compliant with ARP-capable and fixed-address modes; supports dynamic addressing and unique device identification |
| Supply Range | 3.0 V to 5.5 V; compatible with both 3.3 V standby and 5 V main rails in PC power architectures |
| Conversion Rate | Up to 64 measurements/sec; balances responsiveness and power consumption in real-time thermal feedback loops |
| THERM I/O Function | Bidirectional: asserts overtemperature or measures PROCHOT pulse width; critical for Intel platform thermal coordination |
Pinout & Package
ADM1034ARQ-REEL7 is housed in a 16-lead QSOP package (5.3 mm × 10.2 mm, 1.0 mm height), optimized for compact motherboard placement near CPU VRMs and fan headers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DRIVE1) | Fan 1 drive output | Open-drain output driving Fan 1 PWM or DC voltage; requires external pull-up to VCC |
| 2 (TACH1) | Fan 1 speed sense input | Accepts 2-pulse-per-revolution tach signal; enables ±4% RPM measurement accuracy |
| 3 (DRIVE2) | Fan 2 drive output | Independent open-drain output for second cooling fan; supports staggered fan profiles |
| 4 (TACH2) | Fan 2 speed sense input | Isolated tach input for secondary fan; allows independent stall detection and speed regulation |
| 7 (THERM) | PROCHOT I/O terminal | Configurable as overtemperature interrupt output or CPU PROCHOT input with timer-based assertion duration tracking |
| 8 (FAN_FAULT/REF) | Dual-function terminal | Asserts low on fan stall (FAN_FAULT); provides analog reference for THERM input when used as PROCHOT receiver |
| 9–12 (D1−, D1+, D2−, D2+) | Remote diode interfaces | Differential pairs for two independent thermal diodes; supports series resistance cancellation up to 1 kΩ |
| 13 (LOCATION) | SMBus configuration input | 8-level analog voltage sets SMBus version, slave address (0x50–0x53), and UDID LLL bits at power-up |
| 14 (ALERT) | System alert output | Open-drain SMBusALERT signaling out-of-limit events (e.g., overtemp, fan stall) to host controller |
| 15 (SDA), 16 (SCL) | SMBus interface | 2-wire serial bus interface compliant with SMBus 2.0 timing; supports packet error checking (PEC) |
Key Features
| Feature | Design Value |
|---|---|
| Dual remote diode sensing | Simultaneous monitoring of CPU and GPU die temperatures using standard 2N3904/6 or integrated diodes |
| Programmable fan response | Look-up table supports 16 discrete speed steps or linear ramping-enables noise-optimized thermal management |
| PROCHOT coordination | THERM pin times assertion duration and compares against user-defined % limit; essential for Intel platform compliance |
| Fault queue with hysteresis | Configurable queue depth and hysteresis prevents chatter during transient thermal events; improves system stability |
| SMBus address flexibility | LOCATION pin enables 8 unique configurations-supports multiple ADM1034ARQ-REEL7 units on same bus without conflict |
| Fail-safe overtemperature comparator | Hardware-level THERM output bypasses SMBus interface; ensures immediate shutdown if firmware fails or bus hangs |
Applications
| Desktop PC Thermal Management | Notebook PC Fan Control |
|---|---|
|
Use Scenario: Real-time CPU/GPU temperature monitoring and dual-fan speed regulation in ATX motherboards. IC Role / Device Role / Timing Role: Primary thermal sensor and fan controller; provides local ambient + two remote diode readings with 75 ms total conversion time. Use Value: Enables silent operation below 60°C and aggressive cooling above 85°C using linear look-up table mode-reducing acoustic noise by up to 12 dBA. |
Use Scenario: Compact thermal management in space-constrained notebook chassis with discrete GPU and CPU dies. IC Role / Device Role / Timing Role: Dual remote diode interface for CPU and GPU; THERM I/O synchronizes with Intel PROCHOT protocol for coordinated throttling. Use Value: Eliminates need for separate PROCHOT timer IC; reduces BOM count by integrating THERM % limit register and assertion timer. |
| Telecom Equipment Cooling | LCD Projector Thermal Protection |
|
Use Scenario: Fan speed regulation in 1U rack-mounted switches/routers with high-power ASICs generating localized hotspots. IC Role / Device Role / Timing Role: Remote diode monitoring of switch fabric and PHY ICs; ALERT output triggers system-level thermal warning via SMBus master. Use Value: ±0.5°C remote accuracy at TA = +40°C ensures early detection of thermal runaway before ASIC junction limits are exceeded. |
Use Scenario: Lamp and power supply thermal supervision in portable LCD projectors with limited airflow and passive heatsinking. IC Role / Device Role / Timing Role: Local ambient sensor + one remote diode channel for lamp driver IC; FAN_FAULT output halts projection on fan stall. Use Value: Fail-safe overtemperature comparator output (THERM) provides hardware-level shutdown independent of firmware-preventing lamp explosion risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thermal monitoring and fan control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM96163CIMTX/NOPB | Single remote channel; no THERM I/O or PROCHOT timing; 12-bit ADC resolution | Lacks dual-diode support and PROCHOT coordination-unsuitable for Intel platforms requiring THERM % limit enforcement | Select only for cost-sensitive single-processor systems where PROCHOT compliance is not required |
| MAX6657MEE+ | Local + 1 remote channel; SMBus 1.1 only; no look-up table fan control-fan speed set via register write only | No linear/discrete fan profile capability; requires host MCU to compute speed vs. temp-increases firmware overhead | Choose when design uses legacy SMBus 1.1 infrastructure and fan control logic resides entirely in host processor |
Compared with LM96163CIMTX/NOPB and MAX6657MEE+, the ADM1034ARQ-REEL7 uniquely delivers dual remote diode sensing, PROCHOT-aware THERM I/O with %-based timing, and hardware-accelerated fan look-up table-reducing host processing load and enabling Intel-compliant thermal management in a single IC.
Availability
ADM1034ARQ-REEL7 is available at Aetrix Electronics and suitable for desktop PCs, notebook thermal subsystems, and telecom equipment requiring stable component supply with full SMBus 2.0 interoperability and dual-diode precision.
Supply support for ADM1034ARQ-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, serving industrial, automotive, communications, and computing markets since 1965.
The ADM1034ARQ-REEL7 belongs to Analog Devices' thermal management IC product line, designed specifically for intelligent, SMBus-based PC and embedded system cooling with integrated fan control and PROCHOT coordination.
FAQ
What is the maximum series resistance cancellation supported by the ADM1034ARQ-REEL7 for remote diode measurements?
The ADM1034ARQ-REEL7 supports series resistance cancellation up to 1 kΩ on both remote diode channels (D1+/D1− and D2+/D2−). This allows accurate temperature readings despite PCB trace resistance, solder joint variations, or long interconnects between the IC and thermal diodes-critical for maintaining ±1°C accuracy in production systems where layout constraints introduce parasitic resistance.
Does the ADM1034ARQ-REEL7 support Intel PROCHOT protocol, and how is it implemented?
Yes, the ADM1034ARQ-REEL7 supports Intel PROCHOT protocol via its bidirectional THERM pin and REF input on Pin 8. When configured as input, THERM accepts PROCHOT assertions from the CPU; the internal THERM % timer measures assertion duration against a programmable limit. As output, it asserts overtemperature events with hysteresis-enabling full hardware-level coordination with Intel thermal management without host intervention.
How many fan speed profiles can be programmed into the ADM1034ARQ-REEL7 look-up table?
The ADM1034ARQ-REEL7 look-up table supports up to 16 discrete temperature-to-fan-speed entries in discrete mode, or continuous linear interpolation between endpoints in linear mode. Each entry maps a specific temperature threshold to a target fan speed value, allowing designers to define custom acoustic/thermal trade-offs-e.g., silent operation below 65°C and full speed above 85°C-without host MCU involvement.
What SMBus address options are available for the ADM1034ARQ-REEL7, and how are they selected?
The ADM1034ARQ-REEL7 offers four fixed SMBus addresses (0x50–0x53) in fixed-and-discoverable mode, selected by the 8-level analog voltage applied to the LOCATION pin (Pin 13) at power-up. In ARP-capable mode, it supports dynamic address assignment via SMBus Address Resolution Protocol while retaining unique 128-bit UDID-including LOCATION-derived LLL bits-ensuring reliable multi-device enumeration on shared buses.
Can the ADM1034ARQ-REEL7 operate from a 3.3 V supply, and what is its standby current?
Yes, the ADM1034ARQ-REEL7 operates from 3.0 V to 5.5 V, with typical standby current of 900 µA at 3.3 V. This enables integration into 3.3 V standby domains for always-on thermal monitoring-such as S5 sleep state in PCs-while maintaining full functionality including remote diode biasing, SMBus listening, and ALERT generation without waking the host processor.
ADM1034ARQ-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:
- -40°C ~ 125°C, External Sensor
- Accuracy:
- ±1°C
- Topology:
- ADC, Comparator, Multiplexer, Register Bank
- Output Type:
- SMBus
- Output Alarm:
- Yes
- Output Fan:
- Yes
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
ADM1034ARQ-REEL7 FAQ
1.How can I place an order for ADM1034ARQ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1034ARQ-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 ADM1034ARQ-REEL7 reliable?
The price and inventory of ADM1034ARQ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1034ARQ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM1034ARQ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1034ARQ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1034ARQ-REEL7?
ADM1034ARQ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1034ARQ-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 ADM1034ARQ-REEL7?
For technical support, including ADM1034ARQ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1034ARQ-REEL7 requirements.
6.How does Aetrix verify that ADM1034ARQ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM1034ARQ-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 ADM1034ARQ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM1034ARQ-REEL7?
All ADM1034ARQ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1034ARQ-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 ADM1034ARQ-REEL7 part is unused and in its original packaging.
Return procedure for ADM1034ARQ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM1034ARQ-REEL7 Tags
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EMC2101-ACZL-TR
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EMC2101-R-ACZL-TR
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