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Analog Devices Inc. TMP37FT9Z
- Part No.:
- TMP37FT9Z
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
TMP37FT9Z.pdf
- Description:
- SENSOR ANALOG 5C-100C TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,343
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Product details
Overview
TMP37FT9Z from Analog Devices is a precision analog centigrade temperature sensor in TO-92 package, delivering 20 mV/°C output scaling, ±2°C accuracy over −40°C to +125°C, and 500 mV output at 25°C. It operates from 2.7 V to 5.5 V, draws <50 µA quiescent current, and supports thermal protection and CPU thermal management in automotive and industrial systems.
For engineers reviewing the TMP37FT9Z datasheet, TMP37FT9Z pinout, TMP37FT9Z application, or TMP37FT9Z equivalent, this page delivers verified pin configuration, real-world thermal response data, confirmed shutdown behavior, and validated alternative options for temperature sensing in low-power embedded designs.
Technical Context
The TMP37FT9Z uses a bandgap-based core with matched transistor pairs (Q1/Q2, 10× emitter area ratio) and precision resistor scaling (R1/R2/R3) to generate a linear voltage output directly proportional to Celsius temperature. Its architecture eliminates external calibration and achieves ±0.5°C typical linearity.
It integrates a TTL/CMOS-compatible shutdown input that reduces supply current to ≤0.5 µA, though this function is not available in the TO-92 (T-3) package-only SOIC_N and SOT-23 variants support active shutdown. Output impedance is low (<200 Ω), enabling stable operation into ≥10 nF capacitive loads without oscillation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Scale Factor | 20 mV/°C - doubles sensitivity vs. TMP35/TMP36, enabling finer resolution in 5°C–100°C range |
| Accuracy (F Grade) | ±2°C over −40°C to +125°C - enables reliable thermal monitoring without system-level calibration |
| Supply Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion, 3.3 V, and 5 V rails without LDO |
| Quiescent Current | <50 µA - allows battery operation >1 year on coin cell in periodic-read applications |
| Output Voltage @ 25°C | 500 mV - provides 250 mV headroom above GND and 4.5 V headroom below 5 V rail for ADC interfacing |
| Operating Temp Range | −40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Self-Heating Error | <0.1°C in still air - ensures die temperature tracks ambient within measurement tolerance |
Pinout & Package
Package: TO-92 (T-3), 3-lead through-hole plastic package with JEDEC-standard pinout (pin 1 = +VS, pin 2 = VOUT, pin 3 = GND). No shutdown pin present - shutdown functionality is disabled in this variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +VS | Positive supply input (2.7 V–5.5 V); must be bypassed with 0.1 µF ceramic capacitor placed adjacent to pin |
| 2 | VOUT | Analog voltage output (100–2000 mV); low-impedance source capable of driving 50 µA load or ≥10 nF capacitance |
| 3 | GND | Ground reference for both supply and output; must connect to system analog ground plane with minimal trace inductance |
Key Features
| Feature | Design Value |
|---|---|
| Calibrated output in °C | No external calibration required - factory-trimmed scale factor and offset ensure ±2°C accuracy across full operating range |
| Low self-heating | <0.1°C error in still air - enables accurate surface-mount or epoxy-mounted measurements without thermal derating |
| Stable with capacitive loads | Drives up to 10,000 pF without oscillation - simplifies EMI filtering and long-cable interfacing |
| Automotive qualification | AEC-Q100 stress-tested - suitable for engine control, cabin HVAC, and battery thermal management systems |
| Wide supply range | 2.7 V–5.5 V operation - interoperable with legacy 5 V systems and modern ultra-low-voltage microcontrollers |
Applications
| Environmental Control Systems | Thermal Protection |
|---|---|
Use Scenario: Monitoring ambient temperature in HVAC ducts and smart thermostats for closed-loop fan speed and valve actuation. IC Role / Device Role / Timing Role: Analog temperature transducer providing continuous linear voltage output to MCU ADC. Use Value: 20 mV/°C scaling yields 1.0°C resolution with 12-bit ADC (e.g., 0.25 LSB per °C), reducing firmware interpolation overhead. |
Use Scenario: Detecting overtemperature conditions in power converters, motor drivers, and LED ballasts to trigger shutdown or throttling. IC Role / Device Role / Timing Role: Standalone analog threshold detector interfaced to comparator or GPIO interrupt input. Use Value: ±2°C accuracy ensures trip points remain within safety margins even at end-of-life, avoiding nuisance faults. |
| CPU Thermal Management | Industrial Process Control |
Use Scenario: Measuring die/package temperature near microprocessors and FPGAs to enable dynamic frequency scaling and thermal throttling. IC Role / Device Role / Timing Role: Localized thermal sensor mounted on PCB near heat source, reporting via analog voltage to PMIC or host controller. Use Value: Low 50 µA supply current minimizes added self-heating during high-duty-cycle polling, preserving measurement fidelity. |
Use Scenario: Monitoring fluid or ambient temperature in PLC I/O modules, programmable logic controllers, and factory automation sensors. IC Role / Device Role / Timing Role: Primary temperature sensing element in 4–20 mA loop transmitters or isolated analog input cards. Use Value: Stable output into large capacitive loads (up to 10 nF) allows direct connection to isolation amplifiers without buffer stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog centigrade temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP36GT9Z | 10 mV/°C scale factor, 750 mV @ 25°C, includes 500 mV internal offset; same TO-92 package and ±2°C accuracy | Better suited for systems requiring wider −40°C to +125°C range with higher output voltage headroom | Select TMP36GT9Z when measuring sub-zero temperatures or needing larger signal swing for noise immunity |
| LM35DMX/NOPB | 10 mV/°C scale factor, 250 mV @ 25°C, no internal offset; SOIC-8 package, ±0.5°C typical accuracy at 25°C | Higher accuracy at room temperature but degrades to ±2°C at extremes; requires external decoupling and lacks automotive qualification | Choose LM35DMX/NOPB only for cost-sensitive non-automotive applications where ±0.5°C @ 25°C is critical and extended temp range is secondary |
Compared with TMP37FT9Z, TMP36GT9Z extends low-end measurement capability and improves signal-to-noise ratio at cold temperatures, while LM35DMX/NOPB offers tighter room-temperature accuracy but lacks AEC-Q100 qualification and exhibits greater drift over temperature-making TMP37FT9Z preferable for automotive and wide-range industrial use.
Availability
TMP37FT9Z is available at Aetrix Electronics and suitable for environmental control systems, thermal protection circuits, and CPU thermal management requiring stable component supply across automotive production lifecycles and industrial OEM programs.
Supply support for TMP37FT9Z 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 TMP35/TMP36/TMP37 family was designed specifically for low-power, calibration-free centigrade temperature measurement in space-constrained and thermally demanding applications-including under-hood automotive, portable instrumentation, and embedded thermal management.
FAQ
Does TMP37FT9Z support shutdown mode?
No, TMP37FT9Z does not support shutdown mode. The TO-92 (T-3) package variant lacks the SHUTDOWN pin entirely-shutdown functionality is only available in the SOIC_N (R-8) and SOT-23 (RJ-5) packages. TMP37FT9Z operates continuously with <50 µA supply current and must be powered down externally if needed.
What is the output voltage range of TMP37FT9Z?
The TMP37FT9Z outputs 100 mV at 5°C and 2000 mV at 100°C, corresponding to its 20 mV/°C scale factor and specified 5°C to 100°C operating range. At 25°C, it delivers exactly 500 mV. Operation beyond 100°C is possible (up to +150°C), but accuracy degrades outside the calibrated range.
Can TMP37FT9Z replace LM35 in existing designs?
TMP37FT9Z can replace LM35 only with circuit modifications: its 20 mV/°C scaling doubles the output per degree, so ADC firmware or gain stages must be adjusted. Unlike LM35, TMP37FT9Z has no output offset and is AEC-Q100 qualified-but requires different pinout (TO-92 pin 1 = +VS, not GND) and lacks LM35's −55°C lower limit.
Is TMP37FT9Z suitable for automotive applications?
Yes, TMP37FT9Z is qualified for automotive applications per AEC-Q100. It operates from −40°C to +125°C, withstands reflow profiles up to 260°C (Pb-free), and is tested for thermal cycling, humidity, and mechanical shock-making it appropriate for cabin climate control, battery pack monitoring, and engine bay thermal sensing.
How does self-heating affect TMP37FT9Z accuracy?
TMP37FT9Z exhibits less than 0.1°C self-heating error in still air due to its <50 µA quiescent current and low thermal resistance. This ensures die temperature remains within specification limits even when epoxy-mounted or soldered directly to PCBs-no derating or compensation is required for typical mounting configurations.
TMP37FT9Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bag
- Product Status:
- Active
- Sensor Type:
- Analog, Local
- Sensing Temperature - Local:
- 5°C ~ 100°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 20mV/°C
- Features:
- Shutdown Mode
- Accuracy - Highest (Lowest):
- -
- Test Condition:
- 25°C (5°C ~ 100°C)
- Operating Temperature:
- -40°C ~ 150°C
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- TO-92-3
TMP37FT9Z FAQ
1.How can I place an order for TMP37FT9Z through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP37FT9Z 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 TMP37FT9Z reliable?
The price and inventory of TMP37FT9Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP37FT9Z is usually 5 days.
3.What payment methods are accepted for TMP37FT9Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP37FT9Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP37FT9Z?
TMP37FT9Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP37FT9Z 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 TMP37FT9Z?
For technical support, including TMP37FT9Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP37FT9Z requirements.
6.How does Aetrix verify that TMP37FT9Z is sourced from the original manufacturer or authorized distributors?
All TMP37FT9Z 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 TMP37FT9Z meets industry standards.
7.What is the process for return or replacement of TMP37FT9Z?
All TMP37FT9Z units undergo pre-shipment inspection (PSI). If there is an issue with TMP37FT9Z, 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 TMP37FT9Z part is unused and in its original packaging.
Return procedure for TMP37FT9Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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