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Texas Instruments TMP235AQDBZTQ1
- Part No.:
- TMP235AQDBZTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TMP235AQDBZTQ1.pdf
- Description:
- IC TEMP SENSOR
- Quantity:
- Payment:
- Shipping:
Inventory:4,441
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Product details
Overview
TMP235AQDBZTQ1 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. It serves as a precision thermal monitor in high-reliability powertrain and infotainment subsystems.
For engineers reviewing the TMP235AQDBZTQ1 datasheet, TMP235AQDBZTQ1 pinout, TMP235AQDBZTQ1 application, or TMP235AQDBZTQ1 equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, automotive-grade application mappings, and confirmed alternative options - all grounded in TI's SBOS939D production data sheet.
Technical Context
The TMP235AQDBZTQ1 implements a precision bandgap-based analog temperature sensing core with class-AB output driver capable of sourcing up to 500 µA and driving capacitive loads up to 1000 pF directly into ADC sample-and-hold inputs. Its piecewise-linear transfer function (three segments: –40°C to 100°C, 100°C to 125°C, 125°C to 150°C) enables ±0.5°C typical accuracy from 0°C to 70°C while maintaining ±2.5°C max error across full grade-0 range.
Functional safety documentation support is provided for ISO 26262 ASIL-B system integration. The device features short-circuit protected output, 9 µA typical quiescent current, and 800 µs power-on time - enabling low-power cycling architectures in battery-sensitive automotive modules such as EPS and shifter systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±2.5°C max over –40°C to +150°C; ensures reliable thermal margining in gasoline engine control and BMS under extreme ambient conditions. |
| Output Sensitivity | 10 mV/°C with 500 mV offset at 0°C; enables direct ratiometric ADC conversion without external gain/offset calibration. |
| Supply Range | 2.3 V to 5.5 V; compatible with 3.3 V and 5 V automotive domains and tolerant of brown-out conditions down to 2.3 V. |
| Quiescent Current | 9 µA typical; supports ultra-low-power wake-up monitoring in always-on vehicle subsystems. |
| Capacitive Load Drive | Up to 1000 pF; eliminates need for buffer op-amps when interfacing to SAR ADCs with large input capacitance. |
| Power-On Time | 800 µs to ±0.5°C accuracy; allows fast thermal sampling in time-critical diagnostics like EPS motor overtemperature detection. |
| ESD Rating | HBM ±2000 V, CDM ±500 V (corner pins ±750 V); meets AEC-Q100-002/-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 with NiPdAu or Sn lead 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 | Delivers linear 10 mV/°C signal referenced to GND; drives up to 1000 pF load directly into ADC input stages. |
| GND | Power supply ground | Must be connected to low-impedance system ground plane; critical for accuracy stability and ESD path integrity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for –40°C to +150°C operation in powertrain and safety-critical modules per automotive reliability standards. |
| Functional safety documentation | TI-provided FIT data, failure mode analysis, and safety manual support ISO 26262 ASIL-B system-level integration. |
| Strong class-AB output driver | 500 µA max source current and 20 Ω output impedance at 100 Hz enable direct connection to SAR ADCs without buffering. |
| Short-circuit protected output | Prevents latch-up or damage during accidental VOUT-to-GND or VOUT-to-VDD shorts in harness or PCB faults. |
| Footprint compatibility | Pin-compatible with industry-standard LMT8x-Q1, LM50-Q1, and LM20 sensors - simplifies drop-in replacement in legacy designs. |
Applications
| Automotive Head Unit | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time thermal monitoring of audio amplifier ICs and display drivers inside infotainment head units exposed to dashboard solar loading. IC Role / Device Role / Timing Role: Analog temperature sensor providing continuous voltage output proportional to die temperature for thermal throttling and fault reporting. Use Value: ±2.5°C accuracy over –40°C to +150°C ensures safe shutdown before semiconductor junction exceeds 150°C, preventing permanent damage. |
Use Scenario: Monitoring motor winding and MOSFET junction temperature in EPS control modules during high-torque assist events. IC Role / Device Role / Timing Role: Precision analog sensor feeding ADC inputs for closed-loop thermal protection logic with <800 µs response to overtemperature events. Use Value: 9 µA quiescent current and fast turn-on time allow periodic wake-up sampling without compromising battery standby life. |
| Battery Management System (BMS) | Gasoline Engine Control |
Use Scenario: Cell pack surface temperature measurement in 12 V starter battery or 48 V mild-hybrid BMS modules operating under hood vibration and thermal cycling. IC Role / Device Role / Timing Role: High-accuracy analog sensor interfaced directly to microcontroller ADC with minimal external components. Use Value: 1000 pF capacitive load drive capability eliminates need for external op-amp buffers, reducing BOM count and layout area. |
Use Scenario: Cylinder head or intake manifold temperature sensing for air-fuel ratio correction and knock control in gasoline engines. IC Role / Device Role / Timing Role: Automotive-grade analog sensor delivering stable output across wide ambient swings (–40°C to +150°C) with minimal self-heating. Use Value: Piecewise-linear calibration data (Table 7-1) enables software compensation to achieve ±0.5°C accuracy in 0°C–70°C calibration zone. |
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 |
|---|---|---|---|
| LMT87QDBVRQ1 | Higher gain (13.6 mV/°C), ±1.5°C max accuracy over –40°C to +150°C, 3.3 V min supply, 5.5 V max. | Optimized for higher-resolution thermal feedback in compact spaces; less suitable for 2.3 V–3.0 V low-voltage domains. | Select when higher sensitivity and tighter accuracy are required, and supply voltage ≥3.3 V is guaranteed. |
| LM50QIMRQ1 | Lower gain (10 mV/°C), ±3°C max accuracy over –40°C to +125°C, 2.7 V–5.5 V supply, no functional safety documentation. | Cost-optimized for non-safety-critical cabin modules; lacks AEC-Q100 Grade 0 rating and ASIL support. | Select for cost-sensitive, non-safety applications where full Grade 0 range is not needed and functional safety is not mandated. |
Compared with TMP235AQDBZTQ1, LMT87QDBVRQ1 offers superior resolution but narrower supply flexibility, while LM50QIMRQ1 trades accuracy and safety compliance for lower cost - making TMP235AQDBZTQ1 the balanced choice for Grade 0 powertrain and ASIL-B systems requiring 2.3 V operation and documented safety support.
Availability
TMP235AQDBZTQ1 is available at Aetrix Electronics and suitable for automotive head unit thermal management, electric power steering (EPS) motor monitoring, and gasoline engine control applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TMP235AQDBZTQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management solutions.
TMP235AQDBZTQ1 belongs to the TMP23x-Q1 family of AEC-Q100 qualified analog temperature sensors designed specifically for high-accuracy, low-power thermal monitoring in automotive powertrain, chassis, and infotainment systems.
FAQ
What is the operating temperature range of the TMP235AQDBZTQ1?
The TMP235AQDBZTQ1 is rated for –40°C to +150°C operation per AEC-Q100 Grade 0 qualification. Its ±2.5°C maximum accuracy specification applies across this full range, with ±0.5°C typical accuracy from 0°C to +70°C - making it suitable for under-hood and powertrain applications where extreme thermal stress occurs.
Does the TMP235AQDBZTQ1 require external calibration?
No, the TMP235AQDBZTQ1 is factory-calibrated and requires no external trimming. Its 10 mV/°C slope and 500 mV offset at 0°C are specified and tested across temperature and supply voltage. For highest accuracy above 100°C, TI provides piecewise-linear coefficients (Table 7-1) that can be implemented in host firmware - but basic ratiometric use needs no calibration.
Can the TMP235AQDBZTQ1 drive a 1000 pF load directly?
Yes, the TMP235AQDBZTQ1's class-AB output driver is characterized to drive up to 1000 pF capacitive load while maintaining specified accuracy and linearity. This capability eliminates the need for external buffer amplifiers when interfacing to SAR ADCs with large sampling capacitance, reducing system cost and board space.
Is the TMP235AQDBZTQ1 pin-compatible with other TI temperature sensors?
Yes, the TMP235AQDBZTQ1 in SOT-23 (DBZ) package is footprint-compatible with LMT8x-Q1, LM50-Q1, and LM20 sensors. Pin 1 is VDD, pin 2 is VOUT, and pin 3 is GND - matching standard 3-pin analog temperature sensor layouts and enabling mechanical interchangeability in existing PCB designs.
What functional safety documentation is available for the TMP235AQDBZTQ1?
Texas Instruments provides functional safety documentation for the TMP235AQDBZTQ1 including FIT rate data, failure mode effects analysis (FMEA), and a safety manual - supporting ISO 26262 ASIL-B system-level development. This documentation is accessible via TI's product folder and is intended to aid safety architects in qualifying the device within automotive safety-critical systems.
TMP235AQDBZTQ1 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 ~ 125°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- SOT-23-3
TMP235AQDBZTQ1 FAQ
1.How can I place an order for TMP235AQDBZTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP235AQDBZTQ1 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 TMP235AQDBZTQ1 reliable?
The price and inventory of TMP235AQDBZTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP235AQDBZTQ1 is usually 5 days.
3.What payment methods are accepted for TMP235AQDBZTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP235AQDBZTQ1 transactions.
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4.How is shipping managed for TMP235AQDBZTQ1?
TMP235AQDBZTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP235AQDBZTQ1 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 TMP235AQDBZTQ1?
For technical support, including TMP235AQDBZTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP235AQDBZTQ1 requirements.
6.How does Aetrix verify that TMP235AQDBZTQ1 is sourced from the original manufacturer or authorized distributors?
All TMP235AQDBZTQ1 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 TMP235AQDBZTQ1 meets industry standards.
7.What is the process for return or replacement of TMP235AQDBZTQ1?
All TMP235AQDBZTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP235AQDBZTQ1, 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 TMP235AQDBZTQ1 part is unused and in its original packaging.
Return procedure for TMP235AQDBZTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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