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Analog Devices Inc. ADT7408CCPZ-REEL
- Part No.:
- ADT7408CCPZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADT7408CCPZ-REEL.pdf
- Description:
- SENSOR DIGITAL -20C-125C 8LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,548
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Product details
Overview
ADT7408CCPZ-REEL from Analog Devices is a ±2°C accurate, 12-bit digital temperature sensor with SMBus/I²C interface, 0.0625°C resolution, −20°C to +125°C operating range, and open-drain EVENT# output for thermal alarm signaling - used in memory module thermal monitoring and industrial process control.
For engineers reviewing the ADT7408CCPZ-REEL datasheet, ADT7408CCPZ-REEL pinout, ADT7408CCPZ-REEL application, or ADT7408CCPZ-REEL equivalent, key selection factors include JEDEC JC-42.4 compliance, programmable hysteresis (1.5°C/3°C/6°C), shutdown current of 3 µA, 8-lead LFCSP package, and dual-mode event pin (comparator/interrupt) functionality.
Technical Context
The ADT7408CCPZ-REEL integrates a band gap temperature sensor and first-order Σ-Δ ADC delivering 12-bit output in twos complement format with 0.0625°C LSB. Its internal oscillator initiates automatic conversions every 100 ms, with typical conversion time of 60 ms and analog circuitry powering down between cycles.
It supports up to eight devices on one bus via three address pins (A0–A2), implements programmable alarm/critical trip thresholds with hysteresis, and features an open-drain EVENT# pin configurable as comparator or interrupt with polarity and lock control - all compliant with JEDEC JC-42.4 for memory module thermal sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±2°C over +75°C to +95°C; ±3°C over +40°C to +125°C - ensures reliable thermal threshold enforcement in memory and power systems. |
| Resolution | 0.0625°C (12-bit output) - enables fine-grained temperature trending and precise trip point setting. |
| Supply Range | 3.0 V to 3.6 V - compatible with standard 3.3 V system rails without level shifting. |
| Average Current | 240 µA at 3.3 V - supports low-power thermal monitoring in always-on subsystems. |
| Shutdown Current | 3 µA typical - reduces quiescent load during idle periods without losing register state. |
| Conversion Time | 60 ms typical - defines minimum interval between valid temperature reads in polling mode. |
| Hysteresis Options | Selectable 1.5°C, 3°C, or 6°C - prevents chatter in alarm outputs near trip thresholds. |
Pinout & Package
ADT7408CCPZ-REEL is housed in an 8-lead LFCSP package (3 mm × 3 mm, JEDEC MO-229 WEED-4), lead-free and RoHS-compliant, optimized for space-constrained PCB layouts and thermal performance on memory modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | SMBus/I²C address select inputs | Set slave address bits to enable up to eight ADT7408CCPZ-REEL devices on one bus - essential for multi-module thermal mapping. |
| VSS | Negative supply / ground reference | Return path for analog and digital circuits; must be low-impedance to minimize self-heating error. |
| SDA | Open-drain serial data I/O | Bi-directional SMBus/I²C data line requiring external pull-up; supports standard and fast-mode timing. |
| SCL | Open-drain serial clock input | Master-generated clock for synchronous communication; 10–100 kHz compliant per SMBus spec. |
| EVENT# | Open-drain event output | Active-low signal asserting on alarm window breach or critical trip - configurable as comparator or interrupt with polarity control. |
| VDD | Positive supply input | 3.0–3.6 V analog/digital rail; requires local 0.1 µF decoupling capacitor per datasheet layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC JC-42.4 Compliance | Fully meets memory module thermal sensor specification - guarantees interoperability with DDR3/DDR4 DIMM controllers and SPD interfaces. |
| Programmable Trip Registers | Independent upper/lower alarm and critical trip thresholds stored in nonvolatile-equivalent registers - enables adaptive thermal protection without firmware recompile. |
| Dual-Mode EVENT# Pin | Configurable as comparator (latched) or interrupt (edge-triggered) with polarity and lock control - simplifies host MCU interrupt handling or direct hardware shutdown logic. |
| Auto Conversion Timing | 100 ms internal timer initiates 60 ms conversions automatically - eliminates need for external timing control while maintaining predictable update rate. |
| Low-Power Shutdown | 3 µA shutdown current with retained register contents - allows rapid wake-and-read operation without full reinitialization. |
Applications
| Memory Module Thermal Monitoring | Industrial Process Control |
|---|---|
|
Use Scenario: Real-time temperature tracking of DDR4 RDIMMs and LRDIMMs in servers and storage arrays. IC Role / Device Role / Timing Role: JEDEC-compliant thermal sensor providing SMBus-accessible temperature data and hardware alarm signaling to memory controller or BMC. Use Value: Enables dynamic throttling and predictive failure alerts within JEDEC-defined latency and accuracy bounds - critical for memory reliability certification. |
Use Scenario: Ambient and component-level temperature supervision in PLC cabinets and motor drive enclosures. IC Role / Device Role / Timing Role: Local temperature digitizer interfacing directly to microcontroller I²C port, triggering relay cutoff or fan speed modulation. Use Value: Delivers ±2°C accuracy across −20°C to +125°C without calibration - reduces field service costs and improves thermal safety margin. |
| Computer Thermal Monitoring | Power System Monitors |
|
Use Scenario: CPU/GPU VRM and chipset thermal sensing in high-performance workstations and edge AI servers. IC Role / Device Role / Timing Role: Secondary thermal node feeding into system management controller for localized hot-spot detection beyond integrated die sensors. Use Value: 0.0625°C resolution and 60 ms conversion support fine-grained thermal profiling - enabling precise fan curve tuning and transient response. |
Use Scenario: Temperature feedback for DC-DC converter thermal derating and battery pack thermal management in telecom rectifiers. IC Role / Device Role / Timing Role: High-accuracy analog front-end for thermal loop closure, interfaced via I²C to power management IC or FPGA. Use Value: ±2°C accuracy at 85°C and 3 µA shutdown current extend operational lifetime and reduce standby losses in 24/7 infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMM/NOPB | 11-bit resolution, ±2°C accuracy only at 25°C; no hysteresis programming; 0.5°C resolution default. | Lacks JEDEC JC-42.4 compliance and programmable trip registers - unsuitable for memory module use. | Lower-cost option where coarse thermal indication suffices and SMBus timing margins are relaxed. |
| MAX31826ATM+ | 12-bit resolution, ±0.5°C accuracy, parasitic power mode, 1-Wire interface - no I²C/SMBus support. | Requires 1-Wire host stack; incompatible with existing I²C-based thermal firmware and memory controller interfaces. | Preferred when wiring simplicity and single-wire topology outweigh protocol compatibility requirements. |
Compared with LM75BIMM/NOPB and MAX31826ATM+, the ADT7408CCPZ-REEL uniquely combines JEDEC JC-42.4 compliance, programmable hysteresis, and dual-mode EVENT# output - making it the only drop-in solution for DDR memory thermal monitoring and SMBus-centric industrial designs requiring guaranteed accuracy across extended temperature ranges.
Availability
ADT7408CCPZ-REEL is available at Aetrix Electronics and suitable for memory module thermal monitoring, industrial process control, and computer thermal monitoring requiring stable component supply, long-term lifecycle support, and JEDEC-standardized performance.
Supply support for ADT7408CCPZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The ADT7408CCPZ-REEL belongs to Analog Devices' thermal sensor product line, designed specifically for JEDEC-compliant memory module temperature monitoring and high-accuracy embedded thermal management applications.
FAQ
What is the operating temperature range of the ADT7408CCPZ-REEL?
The ADT7408CCPZ-REEL is rated for continuous operation from −20°C to +125°C, with accuracy specifications defined across sub-ranges: ±2°C from +75°C to +95°C, ±3°C from +40°C to +125°C, and ±4°C over the full −20°C to +125°C span. Its absolute maximum ratings extend to −55°C to +150°C for short-term stress conditions.
Does the ADT7408CCPZ-REEL support I²C and SMBus protocols simultaneously?
Yes, the ADT7408CCPZ-REEL implements a fully compatible SMBus/I²C interface with open-drain SDA and SCL pins, supporting standard-mode (100 kHz) timing and SMBus-specific features including timeout and alert response. It responds to 7-bit slave addresses set by A0–A2 pins and handles repeated start conditions per both specifications.
How does the EVENT# pin function in comparator versus interrupt mode on the ADT7408CCPZ-REEL?
In comparator mode (default), EVENT# asserts low when temperature exceeds programmed alarm or critical thresholds and remains latched until cleared by host software or condition reversal. In interrupt mode, it pulses low on threshold crossing and requires explicit clearing via the Configuration Register's Clear Event bit - enabling edge-triggered host response without polling.
What package type and footprint does the ADT7408CCPZ-REEL use?
The ADT7408CCPZ-REEL uses an 8-lead LFCSP package measuring 3 mm × 3 mm (JEDEC MO-229 WEED-4), with exposed paddle for thermal enhancement. It is lead-free and RoHS-compliant, and its pinout matches standard thermal sensor footprints used in DDR memory module designs.
Can the ADT7408CCPZ-REEL operate from a 2.5 V supply?
No - the ADT7408CCPZ-REEL is specified only for 3.0 V to 3.6 V operation. Operation below 3.0 V is outside datasheet limits and may result in undefined behavior, inaccurate conversions, or failure to meet JEDEC JC-42.4 timing and accuracy requirements. Systems using 2.5 V rails require level translation or alternative sensors.
ADT7408CCPZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -20°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- I2C/SMBus
- Voltage - Supply:
- 3V ~ 3.6V
- Resolution:
- 12 b
- Features:
- Output Switch, Programmable Limit, Shutdown Mode
- Accuracy - Highest (Lowest):
- ±2°C (±4°C)
- Test Condition:
- 75°C ~ 95°C (-20°C ~ 125°C)
- Operating Temperature:
- -55°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-LFCSP (3x3)
ADT7408CCPZ-REEL FAQ
1.How can I place an order for ADT7408CCPZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADT7408CCPZ-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 ADT7408CCPZ-REEL reliable?
The price and inventory of ADT7408CCPZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADT7408CCPZ-REEL is usually 5 days.
3.What payment methods are accepted for ADT7408CCPZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADT7408CCPZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADT7408CCPZ-REEL?
ADT7408CCPZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADT7408CCPZ-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 ADT7408CCPZ-REEL?
For technical support, including ADT7408CCPZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADT7408CCPZ-REEL requirements.
6.How does Aetrix verify that ADT7408CCPZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADT7408CCPZ-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 ADT7408CCPZ-REEL meets industry standards.
7.What is the process for return or replacement of ADT7408CCPZ-REEL?
All ADT7408CCPZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADT7408CCPZ-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 ADT7408CCPZ-REEL part is unused and in its original packaging.
Return procedure for ADT7408CCPZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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