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Analog Devices Inc. ADM1023ARQ-REEL
- Part No.:
- ADM1023ARQ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Thermal Management
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADM1023ARQ-REEL.pdf
- Description:
- ACPI-COMPLIANT, HIGH ACCURACY MI
- Quantity:
- Payment:
- Shipping:
Inventory:114,350
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Product details
Overview
ADM1023ARQ-REEL from Analog Devices is a dual-channel, SMBus-compatible microprocessor system temperature monitor IC with on-chip and remote diode sensing. It delivers ±1°C local channel accuracy and 0.125°C remote resolution, operates from 3 V to 5.5 V, draws ≤200 μA at 0.25 conversions/sec, and is housed in a 16-lead QSOP package. It is used for thermal management in Pentium III–based desktops and notebooks.
For engineers reviewing the ADM1023ARQ-REEL datasheet, ADM1023ARQ-REEL pinout, ADM1023ARQ-REEL application, or ADM1023ARQ-REEL equivalent, key selection criteria include remote sensor ideality factor compensation (n = 1.008), open-circuit fault detection on D+/D−, programmable conversion rate (0.0625–4 Hz), ALERT interrupt behavior, and SMBus timing compliance up to 400 kHz.
Technical Context
The ADM1023ARQ-REEL implements a two-current ΔVBE measurement technique to cancel absolute base-emitter voltage variation, enabling calibration-free remote diode sensing. Its ADC digitizes both on-chip sensor output and external PNP/NPN transistor voltage with 8-bit local (1°C LSB) and 11-bit remote (0.125°C LSB) data formats.
It features dedicated offset registers (0x11/0x12) for PCB track resistance and noise-induced error correction, status register bit-level fault reporting (open-circuit, limit violations), and SMBus-compliant ALERT output usable as either interrupt or bus alert signal - all configurable via serial interface without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Local Temp Accuracy | ±0.5°C (60°C–100°C); enables tighter thermal guard bands in CPU thermal throttling. |
| Remote Temp Resolution | 0.125°C (11-bit); supports fine-grained fan speed control and early overtemp warning. |
| Supply Range | 3.0 V to 5.5 V; compatible with legacy 3.3 V and modern 5 V system rails. |
| Standby Current | 1 μA (VDD = 3.3 V); allows continuous monitoring during low-power system suspend states. |
| SMBus Clock Max | 400 kHz; meets full-speed SMBus 2.0 timing requirements for host controller interoperability. |
| Conversion Rate | Programmable 0.0625–4 Hz; balances measurement latency vs. power consumption per thermal design. |
| Package | 16-lead QSOP (5.3 mm × 10.2 mm); surface-mount compatible with standard reflow profiles including Pb-free (260°C peak). |
Pinout & Package
ADM1023ARQ-REEL is packaged in a 16-lead QSOP (Quad Small Outline Package) with 0.65 mm lead pitch and exposed pad not connected internally. Pin 1 is marked by a dot or beveled corner; pins 1, 5, 9, 13, and 16 are no-connect (NC) and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2 (VDD) | Positive supply input | Accepts 3.0–5.5 V; internal UVLO triggers at 2.7 V (±0.15 V) to halt ADC operation. |
| 3 (D+), 4 (D−) | Remote diode sensor interface | D− is internally biased above GND to reject ground noise; supports discrete 2N3904/2N3906 or on-die PNP. |
| 7, 8 (GND) | Ground reference | Dual GND pins reduce ground impedance; must be tied to common system ground plane. |
| 10 (ADD0), 6 (ADD1) | I²C/SMBus address select | Three-state inputs set device address bits A1/A0; default 0x4C when both pulled low. |
| 11 (ALERT) | Open-drain interrupt output | Asserts low on any limit violation or open-circuit fault; requires external pull-up to VDD or SMBus line. |
| 12 (SDATA), 14 (SCLK) | SMBus bidirectional data/clock | Compliant with SMBus 2.0 electrical specs; SDATA is open-drain, SCLK is CMOS input. |
| 15 (STBY) | Standby mode control | Pull low to enter 1 μA standby; pull high for normal conversion (default at power-up). |
Key Features
| Feature | Design Value |
|---|---|
| ΔVBE remote sensing | Eliminates need for factory calibration by measuring voltage difference at two collector currents. |
| Remote sensor open-circuit detection | Hardware-level fault flag (Status Bit 2) prevents false thermal shutdown due to broken diode traces. |
| Programmable conversion rate | Eight selectable rates (0.0625–4 Hz) via Configuration Register (0x04), enabling dynamic power/performance trade-offs. |
| Offset correction registers | 11-bit two's complement offset (0x11/0x12) compensates for PCB trace resistance and noise-induced errors. |
| Pentium III–optimized ideality factor | Hard-coded n = 1.008 in measurement algorithm; limits remote temp error to ±2.5°C across Intel CPU process variation. |
Applications
| Desktop Computers | Notebook Computers |
|---|---|
Use Scenario: Real-time CPU die temperature monitoring alongside VRM thermal feedback. IC Role / Device Role / Timing Role: Remote channel reads Pentium III on-die PNP diode; local channel monitors chipset ambient. Use Value: Enables dynamic frequency scaling and fan PWM control with ±1°C confidence, reducing thermal throttling latency. |
Use Scenario: Compact thermal supervision of CPU, GPU, and battery pack in space-constrained chassis. IC Role / Device Role / Timing Role: Dual-channel measurement replaces discrete thermistors; SMBus integration simplifies host polling. Use Value: 0.125°C remote resolution supports predictive thermal margining before critical junction limits are breached. |
| Smart Batteries | Industrial Controllers |
Use Scenario: Cell pack temperature tracking during fast-charge cycles with simultaneous voltage/current monitoring. IC Role / Device Role / Timing Role: Local sensor monitors BMS IC temperature; remote channel interfaces to NTC or diode on battery module. Use Value: Standby current of 1 μA extends battery shelf life; ALERT output triggers charge termination on overtemp. |
Use Scenario: Fan-cooled PLC backplane with multiple heat-generating modules requiring independent thermal thresholds. IC Role / Device Role / Timing Role: Configured as multi-drop SMBus node; ALERT lines wired to FPGA interrupt inputs. Use Value: Programmable high/low limits per channel allow differentiated trip points for processor vs. I/O section protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM1021ARQ-REEL | Remote resolution limited to 1°C; no ideality factor compensation; lower accuracy (±2°C remote). | Lacks Pentium III optimization; suitable only for non-CPU diode sensing or legacy systems. | Choose only if cost sensitivity outweighs resolution/accuracy needs and remote sensor is discrete (not on-die). |
| LM94022QDCNT | Single-channel analog output (0.5 V/°C); no SMBus interface; no remote diode support. | Requires external ADC and microcontroller polling; no ALERT interrupt or fault detection. | Select when system lacks SMBus infrastructure and only local ambient monitoring is required. |
Compared with ADM1023ARQ-REEL, ADM1021ARQ-REEL offers lower integration and reduced thermal fidelity, while LM94022QDCNT shifts complexity to the host MCU and eliminates digital fault signaling - making ADM1023ARQ-REEL the sole choice for SMBus-based, dual-channel, diode-sensed CPU thermal management.
Availability
ADM1023ARQ-REEL is available at Aetrix Electronics and suitable for desktop computers, notebook computers, and industrial controllers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADM1023ARQ-REEL 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 ADM1023ARQ-REEL belongs to Analog Devices' thermal monitoring product line, engineered specifically for ACPI-compliant microprocessor thermal management in x86 platforms with emphasis on accuracy, SMBus interoperability, and system-level fault resilience.
FAQ
What is the remote temperature sensor compatibility of the ADM1023ARQ-REEL?
The ADM1023ARQ-REEL supports both on-die PNP transistors (e.g., Pentium III) and discrete bipolar junction transistors such as 2N3904/2N3906 wired as diodes. It uses a ΔVBE measurement method that cancels absolute VBE variation, eliminating the need for per-sensor calibration. The ADM1023ARQ-REEL's internal ideality factor compensation (n = 1.008) is optimized for submicron CMOS substrate PNP diodes.
How does the ADM1023ARQ-REEL handle open-circuit conditions on the remote sensor?
The ADM1023ARQ-REEL detects open-circuit faults on the D+/D− inputs and sets Status Register Bit 2. This flag contributes to the NOR'd ALERT assertion, ensuring immediate host notification. The fault condition persists until the sensor connection is restored and the status register is read - preventing spurious recovery in noisy environments. No external circuitry is required for this detection.
Can the ADM1023ARQ-REEL operate from a 5 V supply?
Yes, the ADM1023ARQ-REEL supports 3.0 V to 5.5 V supply operation. While the datasheet specifies guaranteed performance over 3.0–3.6 V, operation at 5 V is confirmed by design and widely deployed in industrial and telecom equipment. Standby current remains ≤5 μA and SMBus timing remains compliant at 5 V, though average operating current increases to ~370 μA at 2 conversions/sec.
What is the function of the STBY pin on the ADM1023ARQ-REEL?
The STBY pin on the ADM1023ARQ-REEL controls entry into ultra-low-power standby mode. When pulled low, the device draws ≤5 μA and halts all conversions; when high (or floating, due to internal pull-up), it performs continuous measurements at the programmed rate. Power-up defaults to active mode unless STBY is externally held low during reset - a behavior used to force initial ALERT assertion for system validation.
Does the ADM1023ARQ-REEL support SMBus Alert Response Address (ARA)?
No, the ADM1023ARQ-REEL does not implement SMBus Alert Response Address (ARA) protocol. Its ALERT output is a standard open-drain interrupt signal that must be polled by the host controller via the status register. The device responds only to its fixed 7-bit SMBus address (default 0x4C) and does not participate in ARA arbitration or dynamic address assignment.
ADM1023ARQ-REEL 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:
- Temp Monitoring System (Sensor)
- Sensor Type:
- Internal and External
- Sensing Temperature:
- 0°C ~ 120°C, External Sensor
- Accuracy:
- ±1°C Local, ±3°C Remote
- Topology:
- ADC, Comparator, Multiplexer, Register Bank
- Output Type:
- SMBus
- Output Alarm:
- Yes
- Output Fan:
- No
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- 0°C ~ 120°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
ADM1023ARQ-REEL FAQ
1.How can I place an order for ADM1023ARQ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1023ARQ-REEL 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 ADM1023ARQ-REEL reliable?
The price and inventory of ADM1023ARQ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1023ARQ-REEL is usually 5 days.
3.What payment methods are accepted for ADM1023ARQ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1023ARQ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1023ARQ-REEL?
ADM1023ARQ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1023ARQ-REEL 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 ADM1023ARQ-REEL?
For technical support, including ADM1023ARQ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1023ARQ-REEL requirements.
6.How does Aetrix verify that ADM1023ARQ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM1023ARQ-REEL 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 ADM1023ARQ-REEL meets industry standards.
7.What is the process for return or replacement of ADM1023ARQ-REEL?
All ADM1023ARQ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1023ARQ-REEL, 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 ADM1023ARQ-REEL part is unused and in its original packaging.
Return procedure for ADM1023ARQ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM1023ARQ-REEL Tags
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