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Analog Devices Inc. AD7414ARM-1REEL7
- Part No.:
- AD7414ARM-1REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7414ARM-1REEL7.pdf
- Description:
- IC SENSOR TEMP 10BIT DGTL 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,924
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Product details
Overview
AD7414ARM-1REEL7 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 hard disk drives and embedded computing systems.
For engineers reviewing the AD7414ARM-1REEL7 datasheet, AD7414ARM-1REEL7 pinout, AD7414ARM-1REEL7 application, or AD7414ARM-1REEL7 equivalent, key selection criteria include its ±0.5°C accuracy at +40°C, open-drain ALERT functionality, AS-pin-selectable I²C address (1001 100), 3 µA shutdown current, and compatibility with SMBus alert protocol in space-constrained thermal management designs.
Technical Context
The AD7414ARM-1REEL7 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 an SMBus/I²C slave interface with 7-bit address (1001 100 for -1 version), AS pin-based address selection, and configurable ALERT polarity and reset behavior. The ALERT output is open-drain, supports SMBus alert response, and activates when temperature exceeds THIGH register value - a feature exclusive to AD7414 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±0.5°C typical at +40°C; ±2.0°C max across −40°C to +125°C - ensures reliable thermal trip point setting without system-level calibration. |
| Resolution | 10-bit (0.25°C per LSB) - enables fine-grained temperature monitoring for fan control and throttling algorithms. |
| Supply Range | 2.7 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level-shifting. |
| Conversion Time | 25 µs typical - allows rapid thermal response in real-time protection circuits. |
| Shutdown Current | 3 µA max - extends battery life in portable devices during idle periods. |
| I²C Address | 1001 100 (AD7414-1 variant) - enables up to 8 unique addresses on shared bus with other AD7414s. |
| Alert Output | Open-drain ALERT with software-configurable polarity - directly interfaces with microcontroller interrupt pins or SMBus host alert lines. |
Pinout & Package
AD7414ARM-1REEL7 is housed in a 6-lead SOT-23 (RJ-6) package with 190.4°C/W junction-to-ambient thermal resistance, optimized for surface-mount reflow assembly and compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AS | Address Select Input | Configures I²C address to 1001 100 (GND-connected); enables multi-sensor bus addressing without external EEPROM. |
| GND | Analog/Digital Ground | Single ground reference for sensor and digital interface; requires low-impedance connection to minimize noise coupling. |
| VDD | Positive Supply | Accepts 2.7–5.5 V; powers internal bandgap sensor, ADC, and SMBus interface - decoupling capacitor required per datasheet. |
| SDA | Serial Data I/O | Open-drain bidirectional I²C/SMBus data line; requires external pull-up resistor (typically 4.7 kΩ). |
| ALERT | Overtemperature Indicator | Open-drain output asserting when temperature > THIGH; supports interrupt-driven firmware and SMBus alert response. |
| SCL | Serial Clock Input | Input-only I²C/SMBus clock line; synchronizes all read/write operations - no internal pull-up required. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip bandgap temperature sensor | Delivers ±0.5°C accuracy at +40°C without external calibration components or compensation circuitry. |
| Programmable THIGH/TLOW registers | Enables hardware-triggered thermal alerts with user-defined trip points - eliminates polling overhead in embedded firmware. |
| SMBus alert compatibility | Allows direct integration into SMBus host systems where ALERT acts as standardized alert signal without custom driver logic. |
| One-shot conversion mode | Permits on-demand temperature reads via single-bit write to configuration register - ideal for low-duty-cycle monitoring. |
| 3 µA shutdown current | Reduces quiescent power to <15 µW at 5 V - critical for always-on thermal sensors in battery-powered IoT nodes. |
Applications
| Hard Disk Drive Thermal Protection | Embedded PC Fan Control |
|---|---|
|
Use Scenario: Monitors spindle motor and controller IC temperature in 2.5″ HDDs to prevent thermal shutdown during sustained writes. IC Role / Device Role / Timing Role: Standalone temperature sensor providing real-time ambient die temperature to host controller via I²C. Use Value: Enables dynamic fan speed adjustment using AD7414ARM-1REEL7's 0.25°C resolution and 25 µs conversion - reduces acoustic noise while maintaining safe operating margins. |
Use Scenario: Tracks CPU voltage regulator and chipset temperature in industrial PCs to trigger thermal throttling before performance degradation. IC Role / Device Role / Timing Role: System-level thermal monitor interfacing with BIOS/firmware through SMBus; ALERT pin connected to PCH interrupt line. Use Value: Leverages AD7414ARM-1REEL7's ±0.5°C accuracy and programmable THIGH register to set precise throttle thresholds - avoids premature throttling seen with lower-accuracy sensors. |
| Network Switch ASIC Monitoring | Industrial PLC Module Sensing |
|
Use Scenario: Measures heat buildup on high-density Ethernet switch ASICs operating in unventilated enclosures. IC Role / Device Role / Timing Role: Local temperature node on ASIC power plane; ALERT output wired to FPGA GPIO for immediate fault reporting. Use Value: Uses AD7414ARM-1REEL7's 3 µA shutdown mode between 800 ms auto-conversions - minimizes thermal contribution to measured zone while maintaining responsiveness. |
Use Scenario: Detects overheating in DIN-rail mounted PLC I/O modules exposed to ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: Ambient temperature sensor placed near relay drivers; communicates via isolated I²C to main controller. Use Value: Relies on AD7414ARM-1REEL7's −40°C to +125°C operating range and 190.4°C/W θJA to remain functional under convection-limited conditions - no heatsink required. |
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 output, fixed I²C address (1001100), −55°C to +125°C range. | Lacks overtemperature interrupt capability and programmable thresholds - requires host polling and software trip logic. | Choose when cost sensitivity outweighs need for hardware alerting and higher resolution. |
| MAX31820MUA+ | 12-bit resolution (0.0625°C), 1-Wire interface, ±0.5°C accuracy, −55°C to +125°C, no ALERT pin. | Uses 1-Wire instead of I²C/SMBus - incompatible with existing 2-wire bus infrastructure without bridge IC. | Prefer only if 1-Wire ecosystem is already deployed and sub-0.25°C resolution is mandatory. |
Compared with LM75BIMM/NOPB and MAX31820MUA+, AD7414ARM-1REEL7 uniquely combines I²C-address flexibility, hardware ALERT assertion, and 0.25°C resolution in a 6-lead SOT-23 - making it optimal for space-constrained, interrupt-driven thermal protection where bus compatibility and precision are jointly critical.
Availability
AD7414ARM-1REEL7 is available at Aetrix Electronics and suitable for hard disk drive thermal protection, embedded PC fan control, and industrial PLC module sensing requiring stable component supply and long-term lifecycle support.
Supply support for AD7414ARM-1REEL7 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.
AD7414ARM-1REEL7 belongs to Analog Devices' precision temperature sensor product line, designed specifically for embedded thermal monitoring where accuracy, small size, and SMBus compatibility are essential in computing, storage, and industrial equipment.
FAQ
What is the I²C address of AD7414ARM-1REEL7 and how is it selected?
The AD7414ARM-1REEL7 uses the AD7414-1 variant with a fixed I²C address of 1001 100 (0x4C). This address is selected by connecting the AS pin to GND, as specified in Table 4 of the datasheet. Unlike floating or VDD-tied configurations, the GND connection ensures deterministic addressing in multi-sensor systems - critical for reliable communication in AD7414ARM-1REEL7 deployments on shared buses.
Does AD7414ARM-1REEL7 support SMBus alert response, and how is it enabled?
Yes, AD7414ARM-1REEL7 supports SMBus alert response via its open-drain ALERT pin. To enable it, the ALERT Enable bit (D5) in the configuration register must be cleared (0), and the ALERT polarity bit (D4) configured for active-low or active-high operation. When temperature exceeds THIGH, the ALERT pin asserts and remains active until reset by writing to the ALERT Reset bit (D3) or when temperature falls below TLOW - a core function of AD7414ARM-1REEL7 not present in AD7415 variants.
What is the maximum operating temperature range for AD7414ARM-1REEL7, and is it rated for automotive use?
AD7414ARM-1REEL7 is rated for −40°C to +125°C operation (A grade), matching the full industrial temperature range. While it meets this thermal specification, it is not AEC-Q200 qualified or marketed for automotive applications; Analog Devices positions it for industrial, computing, and storage systems. For automotive deployment, users must validate reliability under vehicle-specific stress profiles - AD7414ARM-1REEL7 itself carries no automotive qualification.
How does the power-down mode affect temperature measurement capability in AD7414ARM-1REEL7?
In power-down mode (PD bit = 1 in configuration register), AD7414ARM-1REEL7 draws ≤3 µA but retains full functionality: a one-shot conversion can still be triggered by setting the ONE SHOT bit (D2), causing automatic wake-up, measurement, and return to shutdown. This enables ultra-low-power periodic sampling - e.g., once per second - without sacrificing responsiveness, a key advantage of AD7414ARM-1REEL7 in battery-operated thermal monitors.
Can AD7414ARM-1REEL7 measure temperature below −40°C, and what limits its lower bound?
No, AD7414ARM-1REEL7 is not specified or guaranteed for operation below −40°C. Its absolute minimum rating is −40°C (per Absolute Maximum Ratings table), and accuracy specifications (e.g., ±0.5°C) apply only within −40°C to +125°C. Attempting measurement below −40°C may yield invalid data or damage the device due to silicon limitations - the lower bound is defined by process design and qualification, not extrapolation of the ADC transfer function.
AD7414ARM-1REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Cut Tape (CT)
- 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-1REEL7 FAQ
1.How can I place an order for AD7414ARM-1REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7414ARM-1REEL7 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-1REEL7 reliable?
The price and inventory of AD7414ARM-1REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7414ARM-1REEL7 is usually 5 days.
3.What payment methods are accepted for AD7414ARM-1REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7414ARM-1REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7414ARM-1REEL7?
AD7414ARM-1REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7414ARM-1REEL7 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-1REEL7?
For technical support, including AD7414ARM-1REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7414ARM-1REEL7 requirements.
6.How does Aetrix verify that AD7414ARM-1REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7414ARM-1REEL7 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-1REEL7 meets industry standards.
7.What is the process for return or replacement of AD7414ARM-1REEL7?
All AD7414ARM-1REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7414ARM-1REEL7, 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-1REEL7 part is unused and in its original packaging.
Return procedure for AD7414ARM-1REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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