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Analog Devices Inc. ADT75ARM-REEL7
- Part No.:
- ADT75ARM-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADT75ARM-REEL7.pdf
- Description:
- 12-BIT DIGITAL TEMP. SENSOR
- Quantity:
- Payment:
- Shipping:
Inventory:3,280
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Product details
Overview
ADT75ARM-REEL7 from Analog Devices is a ±1°C accurate, 12-bit digital temperature sensor in an 8-pin MSOP package, delivering 0.0625°C resolution and SMBus/I²C-compatible interface for embedded thermal monitoring. It operates from −55°C to +125°C at 3 V to 5.5 V supply, features programmable overtemperature alert (OS/ALERT), and supports one-shot mode for ultra-low-power wake-up sensing in battery-powered systems.
For engineers reviewing the ADT75ARM-REEL7 datasheet, ADT75ARM-REEL7 pinout, ADT75ARM-REEL7 application, or ADT75ARM-REEL7 equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in thermal protection and computer monitoring, and two confirmed alternative parts with documented functional differences and selection guidance.
Technical Context
The ADT75ARM-REEL7 integrates a bandgap temperature sensor with a first-order Σ-Δ modulator ADC, achieving 12-bit output with sign bit and fixed 0.0625°C LSB scaling. Its internal oscillator initiates automatic conversions every 100 ms, with each conversion completing in 60 ms and analog circuitry powering down between cycles.
It implements SMBus/I²C protocol compliance with glitch rejection (50 ns), open-drain SDA/SCL/OS pins requiring external pull-ups, and addressable configuration via A0–A2 pins supporting up to eight devices on one bus. The OS/ALERT pin operates in comparator or interrupt mode with user-defined hysteresis and fault queue (1–6 faults) to suppress noise-induced false triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy (B Grade) | ±1.0°C from 0°C to +70°C - guaranteed error bound for commercial ambient monitoring applications. |
| Temperature Range | −55°C to +125°C - supports industrial and automotive under-hood environments without external calibration. |
| Resolution | 0.0625°C (12-bit twos-complement) - enables precise thermal trend detection and fine-grained setpoint control. |
| Supply Voltage | 3.0 V to 5.5 V - interoperable with both 3.3 V and 5 V logic domains without level-shifting. |
| Shutdown Current | 3 μA typical at 3.3 V - reduces system standby power in portable or energy-harvested nodes. |
| Conversion Time | 60 ms - defines minimum latency for responsive thermal event detection and closed-loop response. |
| I²C Address Pins | A0, A1, A2 - enable hardware-selectable addresses (0x48–0x4F) for multi-sensor bus topology without software arbitration. |
Pinout & Package
ADT75ARM-REEL7 is housed in an 8-pin MSOP (RM-8) package, measuring 3.0 mm × 3.0 mm × 1.0 mm, with exposed pad for thermal dissipation and Pb-free RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SDA | SMBus/I²C Serial Data I/O | Open-drain bidirectional data line; requires external pull-up; supports standard/fast-mode I²C timing. |
| 2: SCL | SMBus/I²C Serial Clock Input | Open-drain clock input; synchronized with SDA; filtered for 50 ns noise immunity. |
| 3: OS/ALERT | Over-/Undertemperature Indicator Output | Open-drain active-low alert; configurable as comparator or interrupt; polarity and fault queue programmable. |
| 4: GND | Analog and Digital Ground | Single ground reference for sensor, ADC, and digital interface; must be low-impedance PCB connection. |
| 5: A2 | I²C Bus Address Bit 2 | Logic input (GND/VDD) setting MSB of 3-bit slave address; enables up to eight ADT75ARM-REEL7 on one bus. |
| 6: A1 | I²C Bus Address Bit 1 | Logic input setting middle bit of slave address; used with A0/A2 to configure unique device address. |
| 7: A0 | I²C Bus Address Bit 0 | Logic input setting LSB of slave address; determines final I²C address (e.g., 0x48–0x4F). |
| 8: VDD | Positive Supply Voltage | 3.0–5.5 V input; requires local 0.1 μF ceramic decoupling capacitor placed near pin for stable ADC operation. |
Key Features
| Feature | Design Value |
|---|---|
| 12-bit temperature-to-digital conversion | Delivers 0.0625°C resolution across full −55°C to +125°C range, enabling high-fidelity thermal profiling without external signal conditioning. |
| Programmable OS/ALERT output | Configurable as comparator or interrupt with user-defined TOS/THYST thresholds and 1–6 fault queue depth to prevent spurious alerts in noisy environments. |
| One-shot measurement mode | Reduces average current to 3 μA by powering up only for a single 60 ms conversion, ideal for intermittent thermal sampling in IoT edge sensors. |
| Pin/register compatibility with LM75 and AD7416 | Enables drop-in replacement in legacy designs using same I²C address map, register layout, and command set-no firmware or layout changes required. |
| Self-contained temperature sensing | On-chip bandgap sensor eliminates need for external thermistors or RTDs, reducing BOM count and calibration overhead in compact PCB layouts. |
Applications
| Computer Thermal Monitoring | Industrial Process Control |
|---|---|
|
Use Scenario: Real-time CPU/GPU die temperature tracking in desktop and server motherboards to trigger dynamic frequency scaling or fan speed control. IC Role / Device Role / Timing Role: Primary ambient temperature sensor interfacing directly to baseboard management controller (BMC) via I²C at 100 ms update rate. Use Value: ±1°C accuracy ensures reliable thermal throttling decisions within safe operating margins, preventing premature performance degradation or thermal shutdown. |
Use Scenario: Monitoring cabinet temperature in PLC enclosures exposed to variable ambient conditions in factory automation lines. IC Role / Device Role / Timing Role: Standalone thermal watchdog feeding alarm signals to safety-rated logic controllers via OS/ALERT pin in comparator mode. Use Value: Programmable hysteresis and fault queue eliminate nuisance trips caused by transient heat spikes, improving system uptime and maintenance predictability. |
| Power-System Monitors | Hand-Held Applications |
|
Use Scenario: Temperature supervision of DC-DC converter MOSFETs and inductors in telecom rectifier modules to prevent thermal runaway. IC Role / Device Role / Timing Role: Local sensor mounted adjacent to power stage, reporting via I²C to system microcontroller for adaptive derating algorithms. Use Value: 3.0–5.5 V supply range matches common power rail voltages; 79 μW typical power enables continuous monitoring without impacting efficiency metrics. |
Use Scenario: Battery pack temperature sensing in medical handheld diagnostics devices requiring long shelf life and low self-heating error. IC Role / Device Role / Timing Role: Low-power thermal monitor activated on-demand via one-shot mode during periodic health checks. Use Value: 3 μA shutdown current extends battery life; small MSOP footprint fits tight space constraints while maintaining ±1°C accuracy at body-temperature range. |
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-5/NOPB | 8-bit resolution (1°C step), ±2°C accuracy over 0°C–70°C, no one-shot mode, identical 8-pin MSOP footprint and I²C address mapping. | Lacks sub-degree resolution and programmable alert hysteresis; suitable only where coarse thermal thresholds suffice. | Select LM75BIMM-5/NOPB when cost sensitivity outweighs resolution needs and existing firmware already supports LM75 register set. |
| MAX31820MUA+ | 1-Wire interface (single-pin bus), ±0.5°C accuracy, parasitic power capable, 6-pin µMAX package - no I²C compatibility or OS/ALERT pin. | Requires different MCU peripheral (1-Wire master), no hardware alert output; better for ultra-low-pin-count or distributed sensor networks. | Choose MAX31820MUA+ only if board-level wiring constraints mandate 1-Wire topology and firmware can accommodate its protocol stack and timing. |
Compared with LM75BIMM-5/NOPB and MAX31820MUA+, the ADT75ARM-REEL7 uniquely combines I²C compatibility, 0.0625°C resolution, programmable OS/ALERT behavior, and true drop-in replacement capability with legacy LM75 designs-making it optimal for upgrading thermal accuracy without redesigning firmware or PCB layout.
Availability
ADT75ARM-REEL7 is available at Aetrix Electronics and suitable for computer thermal monitoring, industrial process control, and power-system monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADT75ARM-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, headquartered in Norwood, MA, with design centers and manufacturing facilities worldwide.
The ADT75ARM-REEL7 belongs to Analog Devices' precision temperature sensor product line, engineered specifically for embedded systems demanding high accuracy, low power, and seamless integration into I²C-based thermal management architectures.
FAQ
What is the guaranteed accuracy specification for ADT75ARM-REEL7 across its full operating temperature range?
The ADT75ARM-REEL7 is specified as B grade, guaranteeing ±1.0°C accuracy from 0°C to +70°C and ±2.0°C from −25°C to +100°C. At extremes (−55°C to +125°C), accuracy degrades to ±3°C per datasheet Table 2. This grading is tested and binned at wafer level, and the ADT75ARM-REEL7 part number corresponds exclusively to the B-grade variant shipped in MSOP tape-and-reel format.
Does ADT75ARM-REEL7 support both SMBus and I²C protocols, and what are the timing requirements?
Yes, ADT75ARM-REEL7 is fully SMBus 1.1 and I²C-compatible, supporting standard mode (100 kHz) and fast mode (400 kHz). Its SDA/SCL inputs include 50 ns glitch rejection filtering, and timing parameters-including t1 (2.5 μs min clock period for fast mode) and t2 (50 ns setup)-are defined in Table 3 of the datasheet. No external clock is needed; all timing is internally generated.
How does the OS/ALERT pin function in comparator versus interrupt mode on ADT75ARM-REEL7?
In comparator mode, the OS/ALERT pin stays asserted low until temperature falls below the THYST threshold; in interrupt mode, it pulses low once per overtemperature event and must be cleared by reading any register. Both modes are selected via Bit D1 of the configuration register, and polarity (active-high/low) is controlled by Bit D2-giving four distinct alert behaviors for flexible system-level response design in ADT75ARM-REEL7 implementations.
Can ADT75ARM-REEL7 be used as a direct replacement for LM75 in existing designs?
Yes, ADT75ARM-REEL7 is explicitly pin- and register-compatible with the LM75, sharing identical pinout, I²C address scheme (0x48–0x4F), register map, and command structure. Firmware written for LM75 will operate ADT75ARM-REEL7 without modification, while gaining improved accuracy (±1°C vs ±2°C), higher resolution (12-bit vs 9-bit), and added features like one-shot mode and enhanced fault queue.
What is the thermal response time and self-heating effect of ADT75ARM-REEL7 in still air?
Per Figure 10, ADT75ARM-REEL7 in MSOP package exhibits <2-hour recovery to 0.01°C error after thermal shock at 25°C; self-heating is negligible (<0.05°C error at 3.3 V) due to 79 μW typical power dissipation. The datasheet confirms no calibration is required-the on-chip sensor provides absolute accuracy traceable to NIST standards across its rated range.
ADT75ARM-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADT75
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -55°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- I2C/SMBus
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 12 b
- Features:
- One-Shot, Output Switch, Programmable Limit, Shutdown Mode
- Accuracy - Highest (Lowest):
- ±2°C (±3°C)
- Test Condition:
- -25°C ~ 100°C (100°C ~ 125°C)
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MSOP
ADT75ARM-REEL7 FAQ
1.How can I place an order for ADT75ARM-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADT75ARM-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 ADT75ARM-REEL7 reliable?
The price and inventory of ADT75ARM-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADT75ARM-REEL7 is usually 5 days.
3.What payment methods are accepted for ADT75ARM-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADT75ARM-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADT75ARM-REEL7?
ADT75ARM-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADT75ARM-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 ADT75ARM-REEL7?
For technical support, including ADT75ARM-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADT75ARM-REEL7 requirements.
6.How does Aetrix verify that ADT75ARM-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADT75ARM-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 ADT75ARM-REEL7 meets industry standards.
7.What is the process for return or replacement of ADT75ARM-REEL7?
All ADT75ARM-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADT75ARM-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 ADT75ARM-REEL7 part is unused and in its original packaging.
Return procedure for ADT75ARM-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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