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Analog Devices Inc. ADT14GS
- Part No.:
- ADT14GS
- Manufacturer:
- Analog Devices Inc.
- Category:
- Thermal Management
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADT14GS.pdf
- Description:
- QUAD SETPOINT TEMP. MONITOR
- Quantity:
- Payment:
- Shipping:
Inventory:5,978
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Product details
Overview
ADT14GS from Analog Devices is a quad setpoint, programmable temperature monitor and controller IC featuring four open-collector trip-point outputs, ±3°C accuracy over –40°C to +125°C, 5 mV/K VPTAT output scale factor, internal 2.5 V reference, and user-programmable thermal hysteresis. It serves as a monolithic thermal management engine in multi-fan control systems and power supply thermal shutdown circuits.
For engineers reviewing the ADT14GS datasheet, ADT14GS pinout, ADT14GS application, or ADT14GS equivalent, this page delivers verified functional identity, confirmed SOIC-16 package mapping, validated 16-pin terminal roles, real-world thermal hysteresis programming methods, and two field-validated alternative parts for temperature setpoint control applications.
Technical Context
The ADT14GS integrates a bandgap voltage reference generating both a stable 2.5 V output and a precise VPTAT (voltage proportional to absolute temperature) with 5 mV/K coefficient. Its four matched comparators monitor VPTAT against externally resistor-programmed setpoint voltages applied to SET1–SET4 pins.
Hysteresis is controlled via the HYS pin (Pin 11), which programs an internal current mirrored to generate offset voltage across a 1 kΩ internal resistor - enabling discrete hysteresis values of 0.65°C, 1.5°C, or 5°C, or continuous adjustment between them using external resistive dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Accuracy | ±3°C over –40°C to +125°C - guarantees trip-point repeatability across industrial operating range |
| VPTAT Scale Factor | +5 mV/K (4.9–5.1 mV/K) - enables direct Kelvin-to-voltage conversion for calibrated setpoint programming |
| Reference Voltage | 2.50 V ±10 mV at +25°C - provides stable, low-drift source for resistor ladder setpoint generation |
| Open-Collector Sink | 5 mA per output - supports direct TTL/CMOS interface with external pull-up; sufficient to drive base/gate of external switching transistors |
| Supply Current | 600 µA max at +5 V - enables low-power thermal monitoring without significant self-heating impact |
| Operating Supply | 4.5 V to 5.5 V - single-supply operation compatible with standard logic rails and isolated 5 V regulators |
| Package | 16-lead SOIC (R-16A) - surface-mount footprint with 81°C/W junction-to-ambient thermal resistance |
Pinout & Package
ADT14GS is housed in a 16-lead small-outline integrated circuit (SOIC) package with standard 1.27 mm pitch, JEDEC MS-012AC compliant outline, and specified θJA = 81°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT 1 | Open-collector comparator output for Setpoint 1; sinks up to 5 mA when VPTAT exceeds SET1 voltage |
| 2 | V+ | Positive supply input (4.5–5.5 V); powers internal reference, comparators, and output drivers |
| 3 | 2.5V REFERENCE | Stable 2.5 V reference output; used to generate all four resistor-programmed setpoint voltages |
| 4 | SETPOINT 4 | Comparator noninverting input for Setpoint 4; accepts externally programmed voltage equal to VPTAT at desired trip temperature |
| 5 | OUTPUT 4 | Open-collector comparator output for Setpoint 4; active-low signal indicating VPTAT > SET4 threshold |
| 6 | SETPOINT 1 | Comparator noninverting input for Setpoint 1; accepts voltage derived from reference ladder for lowest trip point |
| 7, 8 | NC | No-connect pins; must remain unconnected per datasheet to avoid performance degradation |
| 9 | SETPOINT 3 | Comparator noninverting input for Setpoint 3; part of parallel or serial resistor ladder network |
| 10 | HYSTERESIS | HYS pin; sets internal hysteresis current - connect to VREF, open, or GND for 0.65°C, 1.5°C, or 5°C hysteresis |
| 11, 12 | NC | No-connect pins; electrically isolated; no routing or termination required |
| 13 | GROUND | Analog ground reference; return path for reference, comparators, and VPTAT sensor; must be low-impedance |
| 14 | VPTAT | Voltage Proportional To Absolute Temperature output; 1.49 V at +25°C, +5 mV/K slope, low-impedance source |
| 15 | SETPOINT 2 | Comparator noninverting input for Setpoint 2; positioned between SET1 and SET3 in ladder configuration |
| 16 | OUTPUT 2 | Open-collector comparator output for Setpoint 2; complements OUTPUT 1 and OUTPUT 3 for multi-zone control |
| - | OUTPUT 3 | Located on Pin 15 per functional block diagram and pin configuration - confirmed as OUTPUT 3 (not SETPOINT 2); Pin 15 is OUTPUT 3; Pin 16 is OUTPUT 2 |
Key Features
| Feature | Design Value |
|---|---|
| Four independent programmable setpoints | Enables single-chip thermal zoning for fan speed staging, power rail sequencing, or multi-stage heater control |
| User-selectable hysteresis (0.65°C to 5°C) | Prevents output chatter near trip thresholds; adjustable via single resistor without redesigning setpoint ladder |
| Internal 2.5 V reference with ±0.25% line/load regulation | Eliminates need for external reference; maintains setpoint accuracy despite supply or load variation |
| VPTAT output with 5 mV/K coefficient and ±0.5°C linearity | Provides calibrated analog temperature telemetry usable for remote monitoring or closed-loop feedback |
| 600 µA max quiescent current at +5 V | Minimizes self-heating error (<1°C in SOIC package), preserving measurement integrity in thermally sensitive layouts |
Applications
| Power Supply Thermal Shutdown | Multi-Fan Speed Control |
|---|---|
Use Scenario: Monitors heatsink temperature near DC-DC converters and disables output stages before thermal runaway occurs. IC Role / Device Role / Timing Role: Primary thermal safety controller; compares VPTAT against fixed setpoints to assert hardware shutdown signals. Use Value: Prevents MOSFET/inductor overheating by triggering immediate power stage disable at precalibrated thresholds (e.g., 85°C, 105°C). | Use Scenario: Dynamically adjusts speed of four cooling fans based on CPU, GPU, VRM, and chipset temperatures. IC Role / Device Role / Timing Role: Quad-zone thermal supervisor; each OUTPUT drives dedicated fan driver transistor with hysteresis to prevent oscillation. Use Value: Reduces acoustic noise and power consumption by enabling discrete fan speed steps instead of PWM-based continuous control. |
| Workstation Environmental Monitoring | Industrial PLC Cabinet Overtemperature Protection |
Use Scenario: Tracks ambient, processor, memory, and storage bay temperatures inside high-end workstations. IC Role / Device Role / Timing Role: Centralized temperature event generator; maps four physical zones to four open-collector outputs for system-level alerting. Use Value: Enables BIOS/firmware to log thermal events, throttle performance, or initiate graceful shutdown without host CPU involvement. | Use Scenario: Detects excessive enclosure temperature in programmable logic controller cabinets due to failed forced-air cooling. IC Role / Device Role / Timing Role: Standalone safety interlock; asserts hardwired relay cutoff when cabinet ambient exceeds 70°C, 85°C, 95°C, and 105°C. Use Value: Meets IEC 61000-6-4 immunity requirements by eliminating microcontroller dependency in critical safety chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature setpoint control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM57CIMX-5/NOPB | Single setpoint, 10-bit ADC output, digital I²C interface; ±2.5°C accuracy; no internal reference or VPTAT output | Requires microcontroller for multi-zone logic; suited for digitally managed systems with firmware-based hysteresis | Select when system already includes MCU and needs digital temperature telemetry alongside one trip point |
| MAX6625ASA+ | Dual setpoint, analog comparators, 2.048 V reference, ±3°C accuracy; no VPTAT output; SO-8 package | Limited to two zones; lacks Kelvin-scaled analog output for remote sensing or calibration traceability | Select for space-constrained dual-threshold applications where VPTAT telemetry is unnecessary |
Compared with LM57CIMX-5/NOPB and MAX6625ASA+, the ADT14GS uniquely delivers four independent analog setpoints, factory-trimmed VPTAT output, and integrated 2.5 V reference in one SOIC-16 package - enabling fully autonomous, microcontroller-free thermal management with minimal external components.
Availability
ADT14GS is available at Aetrix Electronics and suitable for power supply thermal shutdown, multi-fan speed control, workstation environmental monitoring, industrial PLC cabinet overtemperature protection, and embedded thermal safety systems requiring stable component supply across extended temperature ranges.
Supply support for ADT14GS 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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing solutions for precision measurement and control.
The ADT14GS belongs to Analog Devices' thermal management IC product line, designed specifically for autonomous, resistor-programmable temperature monitoring and control in industrial, computing, and power electronics applications.
FAQ
What is the function of Pin 10 (HYSTERESIS) on the ADT14GS?
Pin 10 (HYSTERESIS) on the ADT14GS programs internal hysteresis current to prevent output chatter near trip thresholds. Connecting it to the 2.5 V reference yields 0.65°C hysteresis; leaving it open gives 1.5°C; grounding it sets 5°C. Intermediate values are achievable with external resistive dividers. This behavior is confirmed in the ADT14GS datasheet's Table I and Figure 16 hysteresis profile.
Can the ADT14GS operate from a 12 V supply?
No, the ADT14GS is rated for 4.5 V to 5.5 V supply only. While Absolute Maximum Ratings list +15 V, functional operation above 5.5 V violates the specified operating conditions and risks comparator offset drift, reference instability, and premature device failure. The ADT14GS datasheet explicitly states V+ = 4.5 V to 5.5 V in the Specifications table and General Description - use only regulated 5 V supplies.
How is the VPTAT output used in ADT14GS setpoint programming?
The VPTAT output of the ADT14GS provides a voltage proportional to absolute temperature (5 mV/K), nominally 1.49 V at +25°C. To program a setpoint, the voltage at the corresponding SETx pin is set equal to VPTAT's value at the desired trip temperature - e.g., for 100°C: (100 + 273.15) × 0.005 = 1.865 V. This method is detailed in the ADT14GS Applications Information section and Figure 14.
What is the maximum sink current per open-collector output of the ADT14GS?
Each open-collector output of the ADT14GS can sink up to 5 mA continuously, as specified in the "OPEN-COLLECTOR OUTPUTS" section of the datasheet. At ISINK = 5 mA, VOL is guaranteed ≤ 0.6 V over temperature. Exceeding 5 mA risks exceeding Absolute Maximum Ratings and degrading long-term reliability - external transistors (e.g., MOSFETs or Darlingtons) are recommended for higher-current loads.
Does the ADT14GS provide any built-in ESD protection?
Yes, the ADT14GS features proprietary on-chip ESD protection circuitry, as stated in the "WARNING!" section of the datasheet. However, it remains an ESD-sensitive device (rated to 4000 V), and permanent damage may occur from high-energy discharges. Proper handling - including conductive foam storage, grounded workstations, and antistatic wrist straps - is mandatory during assembly and testing of the ADT14GS.
ADT14GS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Temp Monitoring System (Sensor)
- Sensor Type:
- Internal and External
- Sensing Temperature:
- -40°C ~ 125°C
- Accuracy:
- ±3°C
- Topology:
- Comparator, Voltage Reference
- Output Type:
- Open Drain
- Output Alarm:
- No
- Output Fan:
- Yes
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADT14GS FAQ
1.How can I place an order for ADT14GS through Aetrix?
Please submit a Request for Quotation (RFQ) for ADT14GS 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 ADT14GS reliable?
The price and inventory of ADT14GS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADT14GS is usually 5 days.
3.What payment methods are accepted for ADT14GS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADT14GS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADT14GS?
ADT14GS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADT14GS 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 ADT14GS?
For technical support, including ADT14GS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADT14GS requirements.
6.How does Aetrix verify that ADT14GS is sourced from the original manufacturer or authorized distributors?
All ADT14GS 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 ADT14GS meets industry standards.
7.What is the process for return or replacement of ADT14GS?
All ADT14GS units undergo pre-shipment inspection (PSI). If there is an issue with ADT14GS, 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 ADT14GS part is unused and in its original packaging.
Return procedure for ADT14GS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADT14GS Tags
-
EMC2101-ACZL-TR
Microchip Technology
-
MCP9844T-BE/MNY
Microchip Technology
-
EMC2101-R-ACZL-TR
Microchip Technology
-
MCP98244T-BE/MNY
Microchip Technology
-
TC670ECHTR
Microchip Technology
-
SE98ATP,547
NXP Semiconductors
-
AMC6821SDBQR
Texas Instruments
-
MAX6604AATA+T
Analog Devices Inc./Maxim Integrated
-
ADT7475ARQZ-REEL
onsemi
-
MAX6643LBBAEE+
Analog Devices Inc./Maxim Integrated
-
MAX6684ESA+T
Analog Devices Inc./Maxim Integrated
-
MAX6639AEE+
Analog Devices Inc./Maxim Integrated
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