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Texas Instruments TMP235AQDCKTQ1
- Part No.:
- TMP235AQDCKTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TMP235AQDCKTQ1.pdf
- Description:
- LOW-POWER HIGH-ACCURACY ANALOG O
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TMP235AQDCKTQ1 from Texas Instruments is an AEC-Q100 Grade 0 automotive-qualified analog-output CMOS temperature sensor with ±2.5°C max accuracy across –40°C to +150°C, 10 mV/°C positive-slope output, and 2.3 V to 5.5 V supply range - deployed in battery management systems and electric power steering for precise thermal monitoring.
For engineers reviewing the TMP235AQDCKTQ1 datasheet, TMP235AQDCKTQ1 pinout, TMP235AQDCKTQ1 application, or TMP235AQDCKTQ1 equivalent, this page delivers verified technical context, package-specific pin functions, real-world automotive use cases, and validated alternative options - all grounded in TI's SBOS939D production data sheet.
Technical Context
The TMP235AQDCKTQ1 implements a precision bandgap-based temperature sensing core with class-AB output driver capable of sourcing up to 500 µA and driving 1000 pF capacitive loads - enabling direct interface to SAR ADC sample-and-hold inputs without external buffering. Its piecewise-linear transfer function (three segments: –40°C–100°C, 100°C–125°C, 125°C–150°C) maintains ±0.5°C typical accuracy from 0°C to 70°C while compensating for gain drift above 100°C.
Functional safety support includes documentation for ISO 26262 ASIL-B system integration, and the device meets AEC-Q100 Grade 0 requirements with HBM ±2000 V and CDM ±500 V ESD ratings. Thermal response time is 1.3 s (63% step in air-to-fluid bath), and self-heating is minimized by 9 µA typical quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±2.5°C max over –40°C to +150°C - guarantees worst-case error bound for safety-critical thermal shutdown decisions in EPS or BMS. |
| Output Sensitivity | 10 mV/°C with 500 mV offset at 0°C - enables direct voltage-to-temperature conversion using single-resistor scaling in MCU ADC firmware. |
| Supply Range | 2.3 V to 5.5 V - supports operation from 12 V automotive rail via LDO or directly from 3.3 V/5 V domain without level-shifting. |
| Quiescent Current | 9 µA typical - allows continuous monitoring in always-on vehicle modules without draining 12 V battery during extended parking. |
| Capacitive Load Drive | 1000 pF maximum - eliminates need for external buffer when interfacing to high-input-capacitance ADCs like TI's ADS795x series. |
| Power-On Time | 800 µs to ±0.5°C accuracy - ensures rapid thermal readiness after wake-up events in start-stop engine control systems. |
| ESD Rating | HBM ±2000 V, CDM ±500 V - meets automotive board-level robustness requirements per AEC-Q100-002/-011. |
Pinout & Package
Package: SC70-5 (DCK), body size 2.00 mm × 1.25 mm, moisture sensitivity level (MSL) Level-2-260°C-1 year, RoHS-compliant NIPDAUAG finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | May be left floating or tied to GND; no electrical function - simplifies PCB routing and avoids unintended coupling. |
| 2 (GND) | Ground reference | Primary return path for sensor core and output driver; must connect to low-impedance analog ground plane to minimize noise. |
| 3 (VOUT) | Analog voltage output | Linear 10 mV/°C output referenced to GND; drives ADC input directly - requires ≤1000 pF total load capacitance including trace and mux capacitance. |
| 4 (VDD) | Positive supply input | Accepts 2.3–5.5 V; bypass capacitor (0.1 µF) required close to pin to suppress supply noise affecting output linearity. |
| 5 (NC) | No internal connection | May be left floating or tied to GND; unused pin - provides mechanical stability and thermal dissipation path in SC70 package. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for –40°C to +150°C operation in powertrain and chassis systems - eliminates need for additional qualification testing in OEM programs. |
| Functional safety documentation | TI-provided FIT rate, failure mode analysis, and diagnostic coverage guidance - accelerates ISO 26262 ASIL-B hardware integration. |
| Short-circuit protected output | Withstands indefinite VOUT-to-GND or VOUT-to-VDD shorts without latch-up or parametric shift - improves field reliability in harness fault conditions. |
| Footprint compatibility | Pin-compatible with LMT8x-Q1, LM50-Q1, and LM20 - enables drop-in replacement on existing layouts without redesign. |
| Strong class-AB output driver | 500 µA max source/sink capability - sustains linearity under 100 µA ADC sampling transients and rejects capacitive loading effects. |
Applications
| Automotive Battery Management System (BMS) | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time cell pack and module temperature monitoring during charging/discharging cycles and regenerative braking. IC Role / Device Role / Timing Role: Analog temperature sensor 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 thermal derating thresholds are enforced before cell degradation or thermal runaway occurs. |
Use Scenario: Motor winding and gearbox oil temperature sensing to prevent torque limitation or shutdown during high-load steering maneuvers. IC Role / Device Role / Timing Role: Primary temperature monitor feeding closed-loop thermal protection logic in EPS ECU. Use Value: 800 µs power-on time enables immediate thermal validation after ignition-on, supporting fast system boot requirements. |
| Shifter System | Automotive Head Unit |
Use Scenario: Gear selector mechanism and solenoid coil temperature tracking to maintain shift timing integrity and prevent mechanical wear at elevated temperatures. IC Role / Device Role / Timing Role: High-reliability analog sensor mounted on shifter control board for thermal derating of actuator drivers. Use Value: SC70-5 footprint and AEC-Q100 Grade 0 rating allow placement in space-constrained, high-temperature zones near transmission tunnel. |
Use Scenario: Processor die and display backlight IC temperature monitoring to throttle performance or dim display before thermal throttling triggers. IC Role / Device Role / Timing Role: Low-power analog sensor supplying temperature feedback to head unit MCU for adaptive thermal management. Use Value: 9 µA quiescent current minimizes parasitic drain on infotainment domain power rail during vehicle sleep mode. |
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), ±2.7°C max accuracy over –40°C to +150°C, 3-pin SOT-23 only | Optimized for higher-resolution measurement in narrow ranges; lacks SC70-5 option and functional safety documentation | Select when higher slope improves ADC LSB resolution and SC70 footprint is not required |
| LM50Q1MDCREP | Lower gain (10 mV/°C), ±3°C max accuracy over –40°C to +125°C, SC70-5 package, no functional safety support | Cost-optimized for non-safety-critical cabin applications; not qualified for Grade 0 or ASIL-B systems | Select for cost-sensitive infotainment or HVAC modules where full Grade 0 range and safety documentation are unnecessary |
Compared with TMP235AQDCKTQ1, LMT87QDBVRQ1 offers better slope but lacks SC70-5 packaging and functional safety resources, while LM50Q1MDCREP matches the SC70-5 footprint and gain but sacrifices accuracy margin and safety certification - making TMP235AQDCKTQ1 the only choice for Grade 0 BMS/EPS with ASIL-B integration needs.
Availability
TMP235AQDCKTQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, electric power steering modules, and shifter control units requiring stable component supply across multi-year vehicle production lifecycles.
Supply support for TMP235AQDCKTQ1 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, embedded processing, and automotive-grade ICs, with decades of experience in high-reliability automotive sensor design.
The TMP23x-Q1 product line was engineered specifically for AEC-Q100-compliant analog temperature sensing in powertrain, chassis, and infotainment systems - delivering precision, low power, and functional safety readiness in compact packages.
FAQ
What is the operating temperature range of the TMP235AQDCKTQ1?
The TMP235AQDCKTQ1 is rated for –40°C to +150°C operation and qualified to AEC-Q100 Grade 0 standards. This full-range specification is validated across all production lots and applies to the SC70-5 (DCK) package variant. The device maintains ±2.5°C maximum accuracy across this entire span, with tighter ±0.5°C typical accuracy from 0°C to 70°C - critical for thermal protection in engine bay and motor control environments where TMP235AQDCKTQ1 is commonly deployed.
Does the TMP235AQDCKTQ1 require external calibration?
No, the TMP235AQDCKTQ1 is factory-calibrated and requires no external trimming or system-level calibration. Its 10 mV/°C slope and 500 mV offset at 0°C are guaranteed across temperature and supply voltage, with accuracy limits including line regulation effects. The piecewise-linear transfer function (documented in TI's SBOS939D) enables software compensation if needed, but most automotive applications use the linear approximation (VOUT = 500 mV + 10 mV/°C × TA) with negligible error below 100°C - simplifying firmware implementation for TMP235AQDCKTQ1 integration.
Can the TMP235AQDCKTQ1 drive a 10-bit ADC input directly?
Yes, the TMP235AQDCKTQ1 can drive a 10-bit ADC input directly when total capacitive load (including trace, multiplexer, and sampling capacitor) remains ≤1000 pF. Its class-AB output driver sources up to 500 µA and exhibits low output impedance (20 Ω at 100 Hz), ensuring minimal settling error during ADC acquisition. For optimal performance, TI recommends adding a 680 pF filter capacitor (CFILTER) near the ADC input - a configuration validated in application note SBOS939D that maintains linearity and reduces noise coupling for TMP235AQDCKTQ1 interfacing.
What is the meaning of "AQ" in TMP235AQDCKTQ1?
The "AQ" in TMP235AQDCKTQ1 denotes the AEC-Q100 Grade 1 temperature range (–40°C to +125°C) and indicates qualification to automotive reliability standards. While the base TMP235-Q1 family includes Grade 0 (–40°C to +150°C) variants, the AQ suffix specifically identifies this part as meeting Grade 1 specifications - confirmed by TI's orderable addendum showing TMP235AQDCKRQ1.A with operating range –40°C to +125°C and marking "1CG". This distinction ensures correct thermal margin selection for applications like shifter systems or head units where full Grade 0 range is unnecessary - a key detail for accurate TMP235AQDCKTQ1 system specification.
Is the TMP235AQDCKTQ1 pin-compatible with other SC70-5 temperature sensors?
Yes, the TMP235AQDCKTQ1 uses the standard SC70-5 (DCK) footprint and shares identical pinout (NC–GND–VOUT–VDD–NC) with TI's LMT8x-Q1, LM50-Q1, and LM20 automotive temperature sensors. This enables direct physical replacement on existing PCBs without layout changes - a documented design advantage in TI's datasheet. However, electrical behavior differs: TMP235AQDCKTQ1 provides 10 mV/°C gain and Grade 1 qualification, whereas LM50-Q1 offers 10 mV/°C but only Grade 3 rating, and LMT87-Q1 delivers 13.6 mV/°C. So while TMP235AQDCKTQ1 is mechanically compatible, functional verification is required for each target application.
TMP235AQDCKTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
TMP235AQDCKTQ1 FAQ
1.How can I place an order for TMP235AQDCKTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP235AQDCKTQ1 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 TMP235AQDCKTQ1 reliable?
The price and inventory of TMP235AQDCKTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP235AQDCKTQ1 is usually 5 days.
3.What payment methods are accepted for TMP235AQDCKTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP235AQDCKTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP235AQDCKTQ1?
TMP235AQDCKTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP235AQDCKTQ1 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 TMP235AQDCKTQ1?
For technical support, including TMP235AQDCKTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP235AQDCKTQ1 requirements.
6.How does Aetrix verify that TMP235AQDCKTQ1 is sourced from the original manufacturer or authorized distributors?
All TMP235AQDCKTQ1 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 TMP235AQDCKTQ1 meets industry standards.
7.What is the process for return or replacement of TMP235AQDCKTQ1?
All TMP235AQDCKTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP235AQDCKTQ1, 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 TMP235AQDCKTQ1 part is unused and in its original packaging.
Return procedure for TMP235AQDCKTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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