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Analog Devices Inc. AD7414ARM-1REEL
- Part No.:
- AD7414ARM-1REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7414ARM-1REEL.pdf
- Description:
- IC SENSOR TEMP 10BIT DGTL 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
AD7414ARM-1REEL from Analog Devices is a ±0.5°C accurate, 10-bit digital temperature sensor in a 6-lead SOT-23 package, featuring SMBus/I²C-compatible serial interface, overtemperature alert (ALERT) output, and programmable high/low temperature thresholds. It operates from −40°C to +125°C with 0.25°C resolution and 25 µs typical conversion time, used for thermal monitoring in PC motherboards and hard disk drives.
For engineers reviewing the AD7414ARM-1REEL datasheet, AD7414ARM-1REEL pinout, AD7414ARM-1REEL application, or AD7414ARM-1REEL equivalent, key selection criteria include its ±0.5°C accuracy at +40°C, open-drain ALERT functionality, AS-pin-selectable I²C address (1001 000–1001 110), 3 µA shutdown current, and compatibility with SMBus alert protocol in embedded thermal management systems.
Technical Context
The AD7414ARM-1REEL integrates a bandgap temperature sensor and successive-approximation ADC to deliver 10-bit temperature data in two's complement format. Its internal oscillator triggers automatic conversions every 800 ms, while the one-shot mode enables on-demand measurement via configuration register write.
It implements full SMBus/I²C slave functionality with address pointer register, read/write registers (THIGH/TLOW/CONFIG), and ALERT output tied to THIGH threshold comparison. The ALERT pin supports active-high/active-low polarity selection and SMBus alert response, with flag bits (ALERT_Flag, THIGH_Flag, TLOW_Flag) accessible in the second temperature read byte.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±0.5°C typ at +40°C - enables precise thermal throttling without calibration in PC and storage applications. |
| Resolution | 0.25°C (10-bit) - provides fine-grained temperature feedback for fan speed control and safety margining. |
| Supply Range | 2.7 V to 5.5 V - supports direct integration into 3.3 V and 5 V system rails without level-shifting. |
| Conversion Time | 25 µs typ - allows rapid thermal response for real-time monitoring in dynamic workloads. |
| Shutdown Current | 3 µA max - minimizes quiescent power in battery-backed or always-on thermal watchdog circuits. |
| I²C Address Options | Three addresses per version (float/GND/VDD on AS pin) - enables up to eight AD7414 devices on one bus without address conflict. |
| Alert Function | Open-drain ALERT with software-configurable polarity and reset - serves as hardware interrupt for MCU-based thermal shutdown logic. |
Pinout & Package
AD7414ARM-1REEL is housed in a 6-lead SOT-23 (RJ-6) package with 1.9 mm × 2.8 mm footprint and 0.95 mm height, optimized for space-constrained PCB layouts in consumer and computing modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AS | Address Select Input | Configures I²C slave address (1001 000/001/010) via float/GND/VDD - enables multi-sensor bus sharing without external address jumpers. |
| GND | Analog & Digital Ground | Single ground reference for sensor and digital interface - requires low-impedance connection to minimize noise coupling into bandgap circuitry. |
| VDD | Positive Supply | 2.7 V–5.5 V power input - powers internal bandgap, ADC, and I²C interface; decoupling capacitor recommended per datasheet. |
| SDA | Serial Data I/O | Open-drain bidirectional I²C data line - requires external pull-up resistor; compatible with 100 kHz/400 kHz standard/fast-mode buses. |
| ALERT | Overtemperature Indicator | Open-drain output asserted when temperature exceeds THIGH - directly interfaces with MCU interrupt pins or SMBus alert handler. |
| SCL | Serial Clock Input | Input-only I²C clock line - synchronizes all register reads/writes; timing meets fast-mode I²C spec (t1 ≥ 2.5 µs). |
Key Features
| Feature | Design Value |
|---|---|
| On-chip bandgap temperature sensor | Delivers ±0.5°C accuracy at +40°C without external calibration - reduces BOM cost and layout complexity vs. discrete sensor+ADC solutions. |
| Programmable THIGH/TLOW registers | 8-bit writable thresholds enable custom thermal trip points - supports adaptive fan control and system-level thermal policy enforcement. |
| ALERT output with polarity control | Configurable active-high/active-low behavior via CONFIG register D4 - eliminates need for external inverters in legacy interrupt designs. |
| One-shot conversion mode | Initiated by writing D2=1 in CONFIG register - allows precise timing of measurements independent of 800 ms auto-cycle, critical for burst-mode thermal profiling. |
| SMBus alert compatibility | ALERT pin responds to SMBus ALERT protocol - enables seamless integration into platforms using SMBus host controllers for system management. |
Applications
| PC Motherboard Thermal Monitoring | Hard Disk Drive (HDD) Temperature Control |
|---|---|
|
Use Scenario: Real-time CPU die and VRM zone temperature tracking during load transitions. IC Role / Device Role / Timing Role: Primary ambient temperature sensor feeding thermal management firmware; ALERT triggers immediate throttle action upon THIGH breach. Use Value: ±0.5°C accuracy ensures reliable thermal margining within 3°C safety bands, preventing premature throttling or thermal runaway. |
Use Scenario: Continuous spindle motor and controller IC temperature supervision in 2.5-inch HDDs. IC Role / Device Role / Timing Role: Dedicated thermal watchdog interfacing with drive controller's SMBus interface; ALERT asserts on >65°C to initiate spin-down. Use Value: 25 µs conversion time enables sub-millisecond response to rapid motor heating, improving drive longevity and error recovery. |
| Industrial PLC Cabinet Monitoring | Network Switch ASIC Thermal Protection |
|
Use Scenario: Ambient air temperature sensing inside sealed control cabinets housing multiple I/O modules. IC Role / Device Role / Timing Role: Standalone temperature node on shared I²C bus; AS pin configured for unique address to avoid collision with other sensors. Use Value: Three selectable I²C addresses per device allow up to eight AD7414ARM-1REEL units on one bus - simplifies multi-zone cabinet monitoring architecture. |
Use Scenario: Localized hotspot detection near high-power Ethernet PHY or switch fabric ASICs. IC Role / Device Role / Timing Role: Secondary thermal sensor adjacent to ASIC package; ALERT connected to FPGA interrupt pin for dynamic clock gating. Use Value: Open-drain ALERT with 4 mA sink capability drives FPGA inputs directly - eliminates level-shifter and reduces component count in dense switch PCBs. |
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 | 9-bit resolution (0.5°C), no ALERT pin, fixed I²C address (1001100), −55°C to +125°C range | Lacks overtemperature interrupt and programmable thresholds - suitable only for basic logging, not safety-critical shutdown. | Choose LM75BIMM/NOPB only when ALERT functionality is unnecessary and lower resolution suffices for non-critical zones. |
| STTS751DTYQV | 12-bit resolution (0.0625°C), ALERT with hysteresis, 1.7 V–5.5 V supply, −55°C to +125°C, 6-lead SOT-23 | Higher resolution and wider voltage range but lacks AS-pin address selection - limits multi-device bus scalability. | Prefer STTS751DTYQV where precision <0.1°C is required and bus address flexibility is managed externally (e.g., multiplexer). |
Compared with LM75BIMM/NOPB and STTS751DTYQV, AD7414ARM-1REEL uniquely balances ±0.5°C accuracy, programmable ALERT with polarity control, and three AS-selectable I²C addresses - making it optimal for compact, multi-sensor thermal management where deterministic interrupt response and bus resource efficiency are essential.
Availability
AD7414ARM-1REEL is available at Aetrix Electronics and suitable for PC motherboard thermal monitoring, hard disk drive temperature control, and industrial PLC cabinet monitoring requiring stable component supply across long-lifecycle production runs.
Supply support for AD7414ARM-1REEL 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 healthcare markets since 1965.
The AD7414ARM-1REEL belongs to Analog Devices' precision temperature sensor product line, designed specifically for embedded thermal management in space-constrained, SMBus/I²C-based systems demanding accuracy, low power, and interrupt-driven responsiveness.
FAQ
What is the operating temperature range of the AD7414ARM-1REEL?
The AD7414ARM-1REEL operates across −40°C to +125°C, meeting A-grade specifications. Its ±0.5°C typical accuracy is specified at +40°C, with worst-case accuracy degrading to ±3.0°C across the full range at 5.5 V supply. This range supports deployment in demanding environments such as server chassis interiors and industrial control enclosures where ambient extremes occur.
How does the ALERT output function in the AD7414ARM-1REEL?
The ALERT output in AD7414ARM-1REEL is an open-drain pin that activates when the measured temperature exceeds the value stored in the THIGH register. Its polarity (active-high or active-low) is configurable via bit D4 in the configuration register. ALERT can be disabled entirely by setting D5=1, and it resets either when the temperature falls below TLOW or when the ALERT reset bit (D3) is written - enabling flexible integration into MCU interrupt or SMBus alert handlers.
Can the AD7414ARM-1REEL operate in low-power modes?
Yes, AD7414ARM-1REEL supports two low-power states: normal mode with 169 µA typical supply current (3 V, serial bus inactive) and shutdown mode drawing ≤3 µA. In shutdown, the device retains register contents but halts conversions; a one-shot command (writing D2=1 in CONFIG) wakes it, performs a single conversion, and returns to shutdown - ideal for battery-powered thermal loggers needing infrequent sampling.
What I²C addresses does the AD7414ARM-1REEL support?
The AD7414ARM-1REEL supports three I²C addresses per version (1001 000, 1001 001, 1001 010) selected by the AS pin state (float, GND, or VDD). As an AD7414-0 variant, it delivers eight total address options across four versions - allowing up to eight AD7414ARM-1REEL units on a single I²C bus without address conflict, unlike the AD7415 which supports only six addresses.
Is the AD7414ARM-1REEL pin-compatible with other AD7414 variants?
Yes, AD7414ARM-1REEL shares identical 6-lead SOT-23 (RJ-6) pinout and electrical characteristics with all AD7414 variants (−0, −1, −3), including AS, GND, VDD, SDA, ALERT, and SCL. Differences are limited to factory-programmed I²C address mapping and minor timing tolerances - enabling drop-in replacement across AD7414 versions in existing designs without PCB modification.
AD7414ARM-1REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- I2C/SMBus
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 10 b
- Features:
- One-Shot, Output Switch, Programmable Limit, Shutdown Mode, Sleep Mode
- Accuracy - Highest (Lowest):
- ±1.87°C (±3°C)
- Test Condition:
- 40°C (-40°C ~ 85°C)
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MSOP
AD7414ARM-1REEL FAQ
1.How can I place an order for AD7414ARM-1REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7414ARM-1REEL 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 AD7414ARM-1REEL reliable?
The price and inventory of AD7414ARM-1REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7414ARM-1REEL is usually 5 days.
3.What payment methods are accepted for AD7414ARM-1REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7414ARM-1REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7414ARM-1REEL?
AD7414ARM-1REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7414ARM-1REEL 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 AD7414ARM-1REEL?
For technical support, including AD7414ARM-1REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7414ARM-1REEL requirements.
6.How does Aetrix verify that AD7414ARM-1REEL is sourced from the original manufacturer or authorized distributors?
All AD7414ARM-1REEL 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 AD7414ARM-1REEL meets industry standards.
7.What is the process for return or replacement of AD7414ARM-1REEL?
All AD7414ARM-1REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7414ARM-1REEL, 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 AD7414ARM-1REEL part is unused and in its original packaging.
Return procedure for AD7414ARM-1REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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