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Analog Devices Inc. TMP35FT9
- Part No.:
- TMP35FT9
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
TMP35FT9.pdf
- Description:
- ANALOG TEMPERATURE SENSOR
- Quantity:
- Payment:
- Shipping:
Inventory:18,133
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Product details
Overview
TMP35FT9 from Analog Devices is a precision centigrade temperature sensor in TO-92 package, delivering 10 mV/°C linear output with ±2°C accuracy over –40°C to +125°C, 250 mV output at 25°C, and <50 µA quiescent current - used for CPU thermal management, fire alarms, and industrial process control.
For engineers reviewing the TMP35FT9 datasheet, TMP35FT9 pinout, TMP35FT9 application, or TMP35FT9 equivalent, this page provides verified functional identity, TO-92 pin mapping, real-world thermal sensing use cases, and two validated alternative parts with documented technical and application differences.
Technical Context
The TMP35FT9 integrates a bandgap core with transistor emitter-area ratio-based ΔVBE generation, scaled by on-chip resistors to deliver 10 mV/°C output with 0 V offset. Its output stage uses an emitter-follower (Q4) for low-impedance buffering and 250 µA short-circuit current limit.
It operates from 2.7 V to 5.5 V, draws ≤50 µA supply current, achieves <0.1°C self-heating in still air, and supports stable operation with capacitive loads up to 10 nF - no shutdown function is available in the TO-92 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Scale Factor | 10 mV/°C - enables direct analog-to-digital conversion without gain calibration |
| Accuracy (25°C) | ±2°C - meets industrial thermal monitoring tolerance requirements without external trimming |
| Operating Range | 10°C to 125°C - suitable for ambient and elevated-temperature environments like power supplies and motor controls |
| Supply Voltage | 2.7 V to 5.5 V - compatible with single-cell Li-ion, 3.3 V, and 5 V logic rails |
| Quiescent Current | <50 µA - enables multi-year battery life in portable thermal monitors |
| Output Voltage @ 25°C | 250 mV - establishes known reference point for system-level offset calibration |
| Thermal Resistance (θJA) | 162°C/W - defines worst-case die-to-ambient temperature rise under socket mounting |
Pinout & Package
Package: TO-92 (plastic through-hole), 3-pin, bottom view orientation. Pin 1 = +VS, Pin 2 = VOUT, Pin 3 = GND. No shutdown pin - feature unavailable in TO-92 variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | +VS | Positive supply input - must be decoupled with 0.1 µF ceramic capacitor placed adjacent to pin |
| Pin 2 | VOUT | Analog voltage output - directly proportional to Celsius temperature (250 mV @ 25°C) |
| Pin 3 | GND | Analog ground reference - shared return path for supply and output; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 2.7 V - eliminates need for LDO in 3.3 V systems with brown-out margin |
| Calibrated in °C | No external calibration required - reduces BOM count and production test time |
| Linearity error | ≤0.5°C (typ) - ensures monotonic response across full operating range for closed-loop control |
| Capacitive load drive | Stable with up to 10 nF - allows direct connection to ADC sample capacitors or long PCB traces |
| Self-heating | <0.1°C in still air - preserves measurement fidelity in thermally isolated enclosures |
Applications
| CPU Thermal Management | Fire Alarms |
|---|---|
Use Scenario: Monitoring die temperature of microprocessors in laptops and embedded controllers to trigger throttling or shutdown before thermal damage occurs. IC Role / Device Role / Timing Role: Analog temperature transducer providing real-time, millivolt-scale feedback to system controller or dedicated thermal management IC. Use Value: 10 mV/°C scale factor and ±2°C accuracy enable precise trip-point setting at 90–105°C without software compensation. |
Use Scenario: Detecting rapid ambient temperature rise (>10°C/min) in ceiling-mounted smoke/heat detectors for early fire warning. IC Role / Device Role / Timing Role: Primary analog temperature sensing element feeding comparator or microcontroller ADC input. Use Value: Low quiescent current (<50 µA) extends battery life in wireless alarm nodes; TO-92 form factor simplifies PCB layout in compact detector housings. |
| Industrial Process Control | Power System Monitors |
Use Scenario: Measuring coolant or enclosure temperature in PLC-controlled HVAC or pump systems to maintain setpoint stability. IC Role / Device Role / Timing Role: Centigrade-scaled analog sensor interfaced to 12-bit SAR ADC in industrial I/O module. Use Value: 0.5°C linearity and ±2°C accuracy over –40°C to +125°C ensure reliable control loop performance across factory floor temperature extremes. |
Use Scenario: Tracking heatsink temperature in AC/DC power supplies and DC-DC converters to prevent MOSFET or transformer thermal runaway. IC Role / Device Role / Timing Role: Direct-mount temperature monitor reporting to supervisor IC or microcontroller via analog input. Use Value: TO-92 mechanical robustness and 162°C/W θJA allow accurate surface-temperature estimation when epoxied to aluminum heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM35DZ | Same 10 mV/°C scale, ±0.5°C typical accuracy at 25°C, but requires ≥4 V supply and has higher quiescent current (60 µA). | Not rated for operation below 4 V or above +125°C; unsuitable for low-voltage battery-powered designs. | Select LM35DZ only if higher accuracy at room temperature is prioritized and supply voltage ≥4 V is guaranteed. |
| TMP36FT9 | Same TO-92 package, ±2°C accuracy, but extends operating range to –40°C and outputs 750 mV at 25°C (500 mV offset). | Enables sub-zero temperature monitoring (e.g., refrigeration, outdoor equipment); offset simplifies single-supply ADC interfacing. | Choose TMP36FT9 when measuring below 10°C or requiring wider dynamic range with same footprint. |
Compared with LM35DZ, TMP35FT9 offers lower supply voltage operation and reduced self-heating; compared with TMP36FT9, it provides zero-offset output ideal for mid-range ambient sensing without level-shifting circuitry.
Availability
TMP35FT9 is available at Aetrix Electronics and suitable for CPU thermal management, fire alarms, and industrial process control requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TMP35FT9 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, founded in 1965 and headquartered in Wilmington, MA.
The TMP35FT9 belongs to Analog Devices' precision temperature sensor product line, designed specifically for low-power, single-supply centigrade measurement in cost-sensitive industrial, computing, and safety-critical applications.
FAQ
What is the operating temperature range of the TMP35FT9?
The TMP35FT9 is specified to operate from 10°C to 125°C with ±2°C accuracy over that range. It can function up to +150°C with reduced accuracy when powered from 5 V. The device is not rated for operation below 10°C - for sub-zero capability, consider TMP36FT9 instead. All specifications for TMP35FT9 assume proper PCB thermal design and minimal self-heating.
Does the TMP35FT9 include a shutdown function?
No, the TMP35FT9 does not include a shutdown function. Shutdown is only available in SOIC-8 (TMP35FS) and SOT-23 (TMP35GRT2) package variants. The TO-92 version (TMP35FT9) has only three pins: +VS, VOUT, and GND. Therefore, TMP35FT9 draws <50 µA continuously and cannot be placed into ultra-low-power sleep mode.
What is the output voltage of the TMP35FT9 at 25°C?
The TMP35FT9 delivers a nominal output voltage of 250 mV at 25°C, with a 10 mV/°C scale factor. This zero-offset transfer characteristic means output voltage = 10 × T(°C) mV. For example, at 35°C output is ~350 mV; at 15°C output is ~150 mV. This linear relationship holds across its full 10°C to 125°C operating range.
Can the TMP35FT9 be used with a 3.3 V supply?
Yes, the TMP35FT9 is fully specified for operation from 2.7 V to 5.5 V, making it compatible with standard 3.3 V logic rails. At 3.3 V, it maintains ±2°C accuracy, 10 mV/°C scale factor, and <50 µA supply current. Output voltage remains valid up to 1.65 V (corresponding to 165°C), well within the 3.3 V rail - ensuring full dynamic range usability.
Is the TMP35FT9 RoHS compliant and lead-free?
Yes, the TMP35FT9 is RoHS compliant and lead-free per Analog Devices' product compliance documentation. The TO-92 package uses matte tin lead finish, and the device meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 rating for unlimited floor life at ≤30°C/60% RH. Full compliance data is available in Analog Devices' official product change notices and material declarations.
TMP35FT9 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Active
- Sensor Type:
- Analog, Local
- Sensing Temperature - Local:
- 10°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 10mV/°C
- Features:
- Shutdown Mode
- Accuracy - Highest (Lowest):
- ±2°C (±3°C)
- Test Condition:
- 25°C (10°C ~ 125°C)
- Operating Temperature:
- -40°C ~ 150°C
- Mounting Type:
- Through Hole
- Grade:
- Automotive
- Qualification:
- -
- Supplier Device Package:
- TO-92-3
TMP35FT9 FAQ
1.How can I place an order for TMP35FT9 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP35FT9 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 TMP35FT9 reliable?
The price and inventory of TMP35FT9 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP35FT9 is usually 5 days.
3.What payment methods are accepted for TMP35FT9?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP35FT9 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP35FT9?
TMP35FT9 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP35FT9 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 TMP35FT9?
For technical support, including TMP35FT9 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP35FT9 requirements.
6.How does Aetrix verify that TMP35FT9 is sourced from the original manufacturer or authorized distributors?
All TMP35FT9 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 TMP35FT9 meets industry standards.
7.What is the process for return or replacement of TMP35FT9?
All TMP35FT9 units undergo pre-shipment inspection (PSI). If there is an issue with TMP35FT9, 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 TMP35FT9 part is unused and in its original packaging.
Return procedure for TMP35FT9:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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