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Texas Instruments TMP235AEDBZTQ1
- Part No.:
- TMP235AEDBZTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TMP235AEDBZTQ1.pdf
- Description:
- IC TEMP SENSOR
- Quantity:
- Payment:
- Shipping:
Inventory:1,402
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Product details
Overview
TMP235AEDBZTQ1 from Texas Instruments is an AEC-Q100 Grade 0 automotive-qualified analog-output CMOS temperature sensor in a 3-pin SOT-23 package, delivering ±2.5°C max accuracy over –40°C to +150°C, 10 mV/°C positive-slope output with 500 mV offset at 0°C, and operates from 2.3 V to 5.5 V supply - deployed in battery management systems and electric power steering for precise thermal monitoring.
For engineers reviewing the TMP235AEDBZTQ1 datasheet, TMP235AEDBZTQ1 pinout, TMP235AEDBZTQ1 application, or TMP235AEDBZTQ1 equivalent, this page delivers verified specifications, validated SOT-23 pin functions, automotive-grade functional safety documentation support, and direct alternatives for thermal sensing in powertrain and infotainment subsystems.
Technical Context
The TMP235AEDBZTQ1 implements a precision bandgap-based analog temperature transducer with class-AB output driver capable of sourcing up to 500 µA into capacitive loads ≤1000 pF, enabling direct interface to SAR ADC sample-and-hold inputs without external buffering. Its piecewise-linear transfer function (three segments: –40°C to 100°C, 100°C to 125°C, 125°C to 150°C) ensures ±0.5°C typical accuracy from 0°C to 70°C and maintains linearity within ±2.5°C across full operating range.
Functional safety capability is supported via TI's documented FMEDA reports and failure mode analysis aligned with ISO 26262 ASIL-B requirements. The device features short-circuit protected output, 9 µA typical quiescent current, and 800 µs power-on time - optimized for low-power cycling in always-on automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±2.5°C max over –40°C to +150°C - guarantees worst-case thermal error in engine bay or battery pack monitoring. |
| Output Sensitivity | 10 mV/°C with 500 mV offset at 0°C - enables direct ratiometric ADC conversion using standard 3.3 V or 5 V references. |
| Supply Range | 2.3 V to 5.5 V - compatible with automotive 3.3 V microcontroller I/O rails and legacy 5 V sensor buses. |
| Quiescent Current | 9 µA typical - supports >10-year battery life in always-on EPS or shifter system wake-up circuits. |
| Capacitive Load Drive | Up to 1000 pF - eliminates need for external buffer when interfacing to high-input-capacitance ADCs (e.g., TI ADS124S08). |
| Power-On Time | 800 µs to ±0.5°C accuracy - allows rapid thermal sampling during vehicle start-up sequences. |
| ESD Rating | HBM ±2000 V, CDM ±500 V - meets AEC-Q100-002 and -011 for robustness in assembly and field operation. |
Pinout & Package
Package: 3-pin SOT-23 (DBZ), body size 2.92 mm × 1.30 mm, moisture sensitivity level (MSL) Level-2-260°C-1 year, RoHS-compliant NIPDAU finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 2.3–5.5 V; requires local 0.1 µF bypass capacitor to ground for noise immunity in noisy automotive environments. |
| VOUT | Analog voltage output | Linear 10 mV/°C positive-slope signal referenced to GND; drives ADC input directly with ≤1000 pF total capacitance (CFILTER + CMUX + CSAMPLE). |
| GND | Power supply ground | Must be connected to low-impedance system ground plane; shared return path for VDD and VOUT reference. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for –40°C to +150°C operation - suitable for under-hood and battery module placement without derating. |
| Functional safety documentation | TI-provided FMEDA and safety analysis reports - accelerates ISO 26262 ASIL-B system-level certification. |
| Strong class-AB output driver | 500 µA max source current - eliminates external op-amp buffer in cost-sensitive BMS and EPS designs. |
| Low self-heating impact | RθJB = 146 °C/W (SOT-23) - limits internal temperature rise to <0.1°C at 9 µA supply, preserving measurement integrity. |
| Footprint compatibility | Pins and layout match LM50-Q1, LMT84-Q1, and LM20 - enables drop-in replacement in existing automotive PCBs. |
Applications
| Automotive Battery Management System (BMS) | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time cell stack and module temperature monitoring in 48 V mild-hybrid and EV traction batteries. IC Role / Device Role / Timing Role: Analog temperature transducer providing linear voltage output proportional to ambient and surface temperature near Li-ion cells. Use Value: ±2.5°C accuracy over –40°C to +150°C ensures safe charge/discharge control and thermal runaway prevention without calibration. |
Use Scenario: Motor and gearbox temperature feedback in column-assist and rack-assist EPS modules. IC Role / Device Role / Timing Role: Primary thermal sensor feeding MCU ADC for torque compensation and fault detection during active steering events. Use Value: 800 µs power-on time enables immediate thermal validation at vehicle ignition; 9 µA quiescent current minimizes standby drain. |
| Automotive Head Unit | Gasoline Engine Control Unit (ECU) |
Use Scenario: Processor die and display backlight thermal regulation in infotainment head units exposed to dashboard solar loading. IC Role / Device Role / Timing Role: Ambient temperature reference for fan speed control and display brightness adjustment algorithms. Use Value: 10 mV/°C gain and 500 mV offset simplify firmware linearization; SOT-23 footprint fits tight board space behind LCD bezel. |
Use Scenario: Cylinder head and intake manifold temperature sensing for air-fuel ratio correction and knock control in turbocharged gasoline engines. IC Role / Device Role / Timing Role: High-accuracy analog front-end sensor interfaced to ECU's 12-bit ADC for closed-loop thermal compensation. Use Value: Short-circuit protected output withstands wiring faults in engine bay harnesses; ±2.5°C accuracy improves combustion efficiency modeling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog-output temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMT84QDBVRQ1 | 13.6 mV/°C gain, ±2.7°C max accuracy over –40°C to +150°C, 3.0 V min supply, 5 µA IQ | Narrower gain slope reduces ADC resolution per degree; lower supply minimum suits ultra-low-voltage domains | Select for tighter supply constraints (<3.0 V) where reduced sensitivity is acceptable for coarse thermal thresholds |
| LM50QIM3X/NOPB | 10 mV/°C gain, ±3°C max accuracy over –40°C to +125°C, 2.7 V min supply, 12 µA IQ | Lower temperature ceiling excludes under-hood use above 125°C; higher quiescent current impacts battery runtime | Choose for cost-sensitive cabin applications (e.g., HVAC control) where 125°C limit is sufficient and footprint compatibility is critical |
Compared with TMP235AEDBZTQ1, LMT84QDBVRQ1 trades sensitivity for ultra-low power, while LM50QIM3X/NOPB offers identical gain but sacrifices high-temperature accuracy and adds 3 µA quiescent current - making TMP235AEDBZTQ1 optimal for Grade 0 under-hood deployments requiring both wide range and low IQ.
Availability
TMP235AEDBZTQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, electric power steering modules, and gasoline engine control units requiring stable component supply across extended product lifecycles.
Supply support for TMP235AEDBZTQ1 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of automotive qualification expertise and broad AEC-Q100 portfolio coverage.
TMP235AEDBZTQ1 belongs to the TMP23x-Q1 family of high-accuracy analog temperature sensors designed specifically for functional-safety-aware automotive thermal monitoring in powertrain, chassis, and infotainment systems.
FAQ
What is the operating temperature range of the TMP235AEDBZTQ1?
The TMP235AEDBZTQ1 is rated for –40°C to +150°C continuous operation, meeting AEC-Q100 Grade 0 requirements. This range is validated across all electrical parameters including accuracy, output linearity, and supply current - making it suitable for under-hood and battery-pack mounting locations where ambient extremes occur.
Does the TMP235AEDBZTQ1 require external calibration?
No, the TMP235AEDBZTQ1 is factory-calibrated and specified to deliver ±2.5°C maximum accuracy over –40°C to +150°C without user calibration. Its piecewise-linear transfer function is characterized and documented in the datasheet, enabling direct voltage-to-temperature conversion in firmware using published inflection points and coefficients.
Can the TMP235AEDBZTQ1 drive a 1000 pF load directly?
Yes, the TMP235AEDBZTQ1's class-AB output driver is explicitly characterized to drive up to 1000 pF capacitive load while maintaining specified accuracy and stability. This includes combined capacitance from ADC input (CMUX + CSAMPLE) and external filter capacitor (CFILTER), eliminating need for external buffer stages in most automotive ADC interfaces.
Is the TMP235AEDBZTQ1 pin-compatible with LM50-Q1?
Yes, the TMP235AEDBZTQ1 uses the same 3-pin SOT-23 (DBZ) package, identical pinout (VDD–VOUT–GND), and matching footprint as LM50-Q1. TI confirms mechanical and electrical compatibility, enabling direct PCB-level replacement in existing designs without layout changes or signal re-routing.
What functional safety documentation is available for the TMP235AEDBZTQ1?
Texas Instruments provides FMEDA reports, safety analysis summaries, and diagnostic coverage data for the TMP235AEDBZTQ1 to support ISO 26262 ASIL-B system development. These documents are accessible through TI's functional safety portal and assist in deriving safety goals, failure modes, and diagnostic strategies for automotive thermal monitoring subsystems.
TMP235AEDBZTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Analog, Local
- Sensing Temperature - Local:
- -40°C ~ 150°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.3V ~ 5.5V
- Resolution:
- 10mV/°C
- Features:
- -
- Accuracy - Highest (Lowest):
- ±2.5°C
- Test Condition:
- -40°C ~ 150°C
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- SOT-23-3
TMP235AEDBZTQ1 FAQ
1.How can I place an order for TMP235AEDBZTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP235AEDBZTQ1 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 TMP235AEDBZTQ1 reliable?
The price and inventory of TMP235AEDBZTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP235AEDBZTQ1 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP235AEDBZTQ1 transactions.
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4.How is shipping managed for TMP235AEDBZTQ1?
TMP235AEDBZTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP235AEDBZTQ1 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 TMP235AEDBZTQ1?
For technical support, including TMP235AEDBZTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP235AEDBZTQ1 requirements.
6.How does Aetrix verify that TMP235AEDBZTQ1 is sourced from the original manufacturer or authorized distributors?
All TMP235AEDBZTQ1 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 TMP235AEDBZTQ1 meets industry standards.
7.What is the process for return or replacement of TMP235AEDBZTQ1?
All TMP235AEDBZTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP235AEDBZTQ1, 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 TMP235AEDBZTQ1 part is unused and in its original packaging.
Return procedure for TMP235AEDBZTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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