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Analog Devices Inc. TMP35FS
- Part No.:
- TMP35FS
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP35FS.pdf
- Description:
- IC SENSOR TEMP 2.7/5.5 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:20,778
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Product details
Overview
TMP35FS from Analog Devices is a precision analog-output centigrade temperature sensor in TO-92 package, delivering 10 mV/°C linear voltage 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 TMP35FS datasheet, TMP35FS pinout, TMP35FS application, or TMP35FS equivalent, this page provides verified functional identity, TO-92 pin mapping, automotive-qualified thermal sensing specs, shutdown behavior, and direct alternatives for embedded thermal monitoring designs.
Technical Context
The TMP35FS implements a bandgap-based core with matched transistor pairs (Q1/Q2 emitter area ratio 10:1) and precision resistor scaling (R1/R2/R3) to generate a calibrated, low-drift voltage proportional to absolute temperature. Its output stage uses emitter-follower Q4 for low-impedance drive and inherent short-circuit limiting (250 µA).
It features a dedicated TTL/CMOS-compatible SHUTDOWN pin (Pin 2 in TO-92), enabling <0.5 µA standby current when pulled low; during shutdown, VOUT enters high-impedance state. Self-heating is limited to <0.1°C in still air due to sub-50 µA supply current and optimized thermal resistance (θJA = 162°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Scale Factor | 10 mV/°C - enables direct ADC conversion with 0.1°C resolution per LSB at 10-bit 3.3 V reference |
| Accuracy (−40°C to +125°C) | ±2°C (typ) - supports thermal protection thresholds 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-powered operation >1 year on 200 mAh coin cell |
| Shutdown Current | ≤0.5 µA - enables ultra-low-power wake-on-temperature modes in IoT edge nodes |
| Operating Temperature | −40°C to +125°C (rated); up to +150°C (degraded accuracy) - suitable for under-hood automotive use |
| Output Voltage at 25°C | 250 mV - establishes known DC offset for ratiometric error rejection in ADC sampling |
Pinout & Package
Package: TO-92 (T-3), 3-lead through-hole plastic package with θJA = 162°C/W and θJC = 120°C/W. Pin 1 = +VS, Pin 2 = VOUT, Pin 3 = GND (bottom view). No NC pins; all three terminals are functional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VS (Pin 1) | Positive supply input | Accepts 2.7–5.5 V; powers internal bandgap core and output buffer; requires 0.1 µF ceramic bypass capacitor |
| VOUT (Pin 2) | Analog voltage output | High-impedance source during shutdown; delivers 10 mV/°C linear signal referenced to GND; drives ≤50 µA load |
| GND (Pin 3) | Analog ground reference | Return path for supply and output; must be low-impedance and star-connected to avoid noise coupling into VOUT |
Key Features
| Feature | Design Value |
|---|---|
| Calibrated output in °C | No external calibration required - ±1°C at 25°C and ±2°C across full range simplifies production test |
| Stable with capacitive loads | Drives up to 10 nF without oscillation - eliminates need for output isolation resistors in noisy environments |
| Low self-heating | <0.1°C in still air - ensures measurement fidelity in thermally isolated PCB locations |
| Automotive qualification | AEC-Q100 Grade 3 qualified - validated for under-dash, engine bay, and powertrain thermal monitoring |
| Shutdown mode | 0.5 µA max current - enables firmware-controlled thermal polling intervals in microcontroller sleep states |
Applications
| CPU Thermal Management | Fire Alarms |
|---|---|
Use Scenario: Real-time die temperature monitoring of microprocessors and SoCs to trigger dynamic frequency scaling or emergency shutdown. IC Role / Device Role / Timing Role: Analog front-end sensor providing continuous, ratiometric voltage output directly interfaced to MCU ADC. Use Value: Enables precise thermal throttling at ±2°C accuracy without calibration overhead, reducing risk of thermal runaway in compact enclosures. |
Use Scenario: Ambient temperature detection in smoke/heat detectors to distinguish smoldering fires (slow temp rise) from flaming fires (rapid rise). IC Role / Device Role / Timing Role: Primary temperature transducer feeding comparator or microcontroller threshold logic. Use Value: Sub-50 µA supply current extends battery life in wireless standalone units; TO-92 form factor fits compact detector housings. |
| Industrial Process Control | Power System Monitors |
Use Scenario: Monitoring coolant, oil, or enclosure temperature in PLCs, motor drives, and HVAC controllers. IC Role / Device Role / Timing Role: Centigrade-scaled analog sensor integrated into 4–20 mA loop transmitters or isolated ADC front ends. Use Value: 10 mV/°C linearity and ±0.5°C typ linearity error ensure accurate setpoint tracking across wide industrial temperature ranges. |
Use Scenario: Tracking heatsink or transformer winding temperature in AC/DC power supplies and UPS systems. IC Role / Device Role / Timing Role: Standalone thermal sentinel triggering fan control or overtemp fault signals via comparator or GPIO. Use Value: Shutdown mode reduces system idle power; TO-92 mechanical robustness withstands vibration in rack-mounted power modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog-output centigrade temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM35DZ | 10 mV/°C scale, ±0.5°C at 25°C, no shutdown pin, 60 µA supply current, TO-92 package | Lacks shutdown capability; higher quiescent current limits battery life; no automotive qualification | Select LM35DZ only for cost-sensitive, non-automotive, always-on thermal monitoring where shutdown is unnecessary. |
| TMP235DBZT | 10 mV/°C scale, ±0.5°C at 25°C, SOT-23-3 package, 9 µA supply current, no shutdown | Lower power and smaller footprint but lacks shutdown and automotive rating; different pinout (VOUT/GND/+VS) | Choose TMP235DBZT for space-constrained, ultra-low-power consumer electronics where automotive compliance is not required. |
Compared with TMP35FS, LM35DZ offers tighter room-temperature accuracy but no shutdown or AEC-Q100 support, while TMP235DBZT reduces size and current draw at the expense of thermal robustness and functional safety readiness - TMP35FS remains optimal for automotive and industrial thermal protection requiring guaranteed shutdown and extended temperature operation.
Availability
TMP35FS is available at Aetrix Electronics and suitable for CPU thermal management, fire alarms, and industrial process control requiring stable component supply, long-lifecycle assurance, and automotive-grade traceability.
Supply support for TMP35FS 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 TMP35FS belongs to Analog Devices' precision temperature sensor product line, designed specifically for reliable, low-power, calibration-free thermal monitoring in harsh environments including automotive under-hood and industrial control cabinets.
FAQ
What is the pin configuration of the TMP35FS?
The TMP35FS uses a TO-92 (T-3) package with bottom-view pinout: Pin 1 = +VS, Pin 2 = VOUT, Pin 3 = GND. All three pins are functional - no NC terminals. This matches the standard TMP35 pin assignment and differs from SOIC_N and SOT-23 variants which include a dedicated SHUTDOWN pin.
Does the TMP35FS support shutdown functionality?
No - the TMP35FS does not implement shutdown. Only the SOIC_N (R-8) and SOT-23 (RJ-5) variants of TMP35/TMP36/TMP37 include a SHUTDOWN pin. The TO-92 packaged TMP35FS has no shutdown capability and draws <50 µA continuously when powered.
What is the output voltage of the TMP35FS at 0°C and 100°C?
At 0°C, the TMP35FS outputs 0 mV (since its offset is 0 V and scale factor is 10 mV/°C). At 100°C, it outputs 1.00 V. This linear relationship holds across its operating range (10°C to 125°C), with 250 mV output at 25°C as specified in the datasheet.
Is the TMP35FS qualified for automotive applications?
Yes - the TMP35FS is AEC-Q100 Grade 3 qualified (−40°C to +125°C ambient), making it suitable for passenger compartment and under-hood automotive thermal monitoring applications such as battery management, HVAC control, and engine coolant sensing.
How does the TMP35FS differ from the TMP36FS?
The TMP35FS and TMP36FS share the same TO-92 package and 10 mV/°C scale factor, but differ in offset and temperature range: TMP35FS has 0 V offset (250 mV at 25°C) and operates from 10°C to 125°C; TMP36FS has 0.5 V offset (750 mV at 25°C) and operates from −40°C to +125°C - enabling sub-zero measurements.
TMP35FS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Sensor Type:
- -
- Sensing Temperature - Local:
- -
- Sensing Temperature - Remote:
- -
- Output Type:
- -
- Voltage - Supply:
- -
- Resolution:
- -
- Features:
- -
- Accuracy - Highest (Lowest):
- -
- Test Condition:
- -
- Operating Temperature:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
TMP35FS FAQ
1.How can I place an order for TMP35FS through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP35FS 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 TMP35FS reliable?
The price and inventory of TMP35FS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP35FS is usually 5 days.
3.What payment methods are accepted for TMP35FS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP35FS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP35FS?
TMP35FS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP35FS 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 TMP35FS?
For technical support, including TMP35FS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP35FS requirements.
6.How does Aetrix verify that TMP35FS is sourced from the original manufacturer or authorized distributors?
All TMP35FS 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 TMP35FS meets industry standards.
7.What is the process for return or replacement of TMP35FS?
All TMP35FS units undergo pre-shipment inspection (PSI). If there is an issue with TMP35FS, 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 TMP35FS part is unused and in its original packaging.
Return procedure for TMP35FS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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