My Inquiry
My Account
Texas Instruments TMP126EDCKRQ1
- Part No.:
- TMP126EDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
TMP126EDCKRQ1.pdf
- Description:
- AUTOMOTIVE 0.25C SPI TEMPERATURE
- Quantity:
- Payment:
- Shipping:
Inventory:2,004
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TMP126EDCKRQ1 from Texas Instruments is an AEC-Q100 Grade-0 automotive-grade digital temperature sensor with ±0.25°C max accuracy from 20°C to 30°C, 14-bit resolution (0.03125°C/LSB), and operation up to 175°C ambient. It features a 3-wire SPI interface, programmable temperature alert limits, slew rate warning, and optional CRC for data integrity - deployed in traction inverters and on-board chargers where thermal reliability under extreme conditions is critical.
For engineers reviewing the TMP126EDCKRQ1 datasheet, TMP126EDCKRQ1 pinout, TMP126EDCKRQ1 application, or TMP126EDCKRQ1 equivalent, key selection criteria include its 175°C operational range, NIST-traceable factory calibration, low 1.2 µA average current at 1 Hz, SOT-SC70 (DCK) package footprint, and autonomous ALERT-driven thermal monitoring without host polling.
Technical Context
The TMP126EDCKRQ1 integrates a precision bandgap-based thermal BJT sensor with a 14-bit sigma-delta ADC and digital core supporting continuous, one-shot, and shutdown modes. Its SPI interface operates up to 10 MHz with strict timing margins (tSU = 10 ns, tHOLD = 20 ns) and supports CRC-16 validation on read/write transactions.
Thermal protection logic includes dual independent alert mechanisms: static threshold comparison (TLow/THigh registers) and dynamic slew rate detection (Slew_Limit register), both reflected in the Alert_Status register and controllable via open-drain ALERT output in interrupt or comparator mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±0.25°C max (20–30°C); ±0.75°C max (150–175°C) - enables precise thermal margining in high-temp powertrain zones |
| Resolution | 14-bit signed (0.03125°C/LSB) - supports fine-grained temperature trending for predictive thermal control |
| Supply Range | 1.62 V to 5.5 V - compatible with 1.8 V, 3.3 V, and 5 V automotive domains without level-shifting |
| Average Current | 1.2 µA @ 1 Hz, 25°C - extends battery life in always-on vehicle control units |
| Conversion Time | 4.5–7.5 ms active time - allows rapid thermal response without self-heating impact when ≥31.25 ms period used |
| Operating Range | –55°C to +175°C ambient - qualified for exhaust proximity, inverter junction monitoring, and under-hood placement |
| SPI Speed | Up to 10 MHz - enables fast register access in real-time control loops with minimal bus overhead |
Pinout & Package
The TMP126EDCKRQ1 is housed in a 6-pin SOT-SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for PCB space-constrained locations near heat sources and offering fast thermal response (0.6 s stirred liquid τ on flex PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low SPI enable; must be held high between frames (tINTERFRAME ≥ 100 ns) |
| GND | Ground reference | Common return for analog/digital circuitry; requires low-impedance connection to minimize noise coupling |
| SIO | Serial I/O bidirectional | 3-wire SPI data line; supports CRC-16 appended on reads and validated on writes |
| SCLK | Serial clock input | Master-generated clock up to 10 MHz; timing-critical for setup/hold compliance (tSU = 10 ns, tHOLD = 20 ns) |
| ALERT | Open-drain status output | Asserts on temperature limit breach or slew rate exceedance; configurable as interrupt or comparator mode |
| VDD | Power supply | 1.62–5.5 V input; includes internal POR (1.3 V rise, 1.1 V fall) and brownout detection |
Key Features
| Feature | Design Value |
|---|---|
| Temperature Slew Rate Warning | Configurable positive dT/dt threshold (Slew_Limit register) triggers ALERT before crossing absolute thermal limits - enables proactive thermal derating |
| NIST-Traceable Calibration | Factory-trimmed against ISO/IEC 17025-accredited standards - eliminates system-level calibration effort and ensures long-term accuracy confidence |
| Autonomous Alert Modes | ALERT pin supports interrupt mode (edge-triggered, auto-clear on status read) or comparator mode (level-sensitive, persistent until condition clears) - simplifies host firmware architecture |
| Low-Power Operating Modes | Shutdown current ≤ 0.5 µA; standby current ≤ 0.75 µA; active current ≤ 87 µA - enables energy-efficient thermal monitoring in wake-sleep systems |
| CRC-16 Data Integrity | Optional 16-bit checksum on all SPI reads/writes - prevents undetected communication corruption in noisy automotive ECU environments |
Applications
| Transmission Control Units | On-board Chargers (OBC) |
|---|---|
Use Scenario: Real-time oil and clutch pack temperature monitoring during gear shifts and torque transfer. IC Role / Device Role / Timing Role: Primary high-accuracy thermal sensor feeding closed-loop transmission control algorithms with <10 ms latency. Use Value: Enables adaptive shift scheduling and clutch slip control using ±0.25°C accuracy below 30°C and robust 175°C operation during peak load. | Use Scenario: Monitoring power semiconductor junction temperature and coolant inlet/outlet in high-voltage OBC modules. IC Role / Device Role / Timing Role: Autonomous thermal watchdog with slew rate alert triggering pre-emptive power derating before SiC MOSFET thermal runaway. Use Value: Prevents thermal shutdown events by detecting rapid temperature rise (>10°C/s) via Slew_Limit register, extending component lifetime. |
| Brake Systems | Traction Inverters |
Use Scenario: Caliper and brake fluid temperature sensing in electro-hydraulic brake (EHB) actuators exposed to under-hood heat soak. IC Role / Device Role / Timing Role: AEC-Q100 Grade-0 sensor placed directly on actuator housing for direct thermal feedback to brake control module. Use Value: Maintains ±0.5°C accuracy across –40°C to 125°C operating range, ensuring consistent brake-by-wire performance despite ambient extremes. | Use Scenario: Direct mounting on IGBT/SiC module baseplate to monitor inverter case temperature during high-frequency PWM switching. IC Role / Device Role / Timing Role: High-speed thermal sentinel providing 7.5 ms conversion updates to inverter gate driver safety logic. Use Value: 0.6 s liquid response time (DCK package) and 1.62–5.5 V supply tolerance allow integration into compact, isolated inverter designs without external regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP126NEDCKRQ1 | Lower accuracy (±0.8°C max over full range); same DCK package and pinout; no NIST traceability | Suitable for non-safety-critical cabin or body control modules where cost sensitivity outweighs precision | Select when thermal margin requirements permit relaxed accuracy and calibration documentation is not required |
| TMP127EDBVQ1 | Same accuracy spec but in larger SOT-23 (DBV) package (2.90 × 1.60 mm); higher RθJA (168.2°C/W vs. 183.4°C/W) | Better suited for PCB layouts with less thermal constraint and where board area permits larger footprint | Choose when layout allows DBV package and faster thermal response is less critical than ease of rework or solder inspection |
Compared with TMP126NEDCKRQ1, the TMP126EDCKRQ1 delivers tighter accuracy and NIST traceability essential for ASIL-B thermal management; versus TMP127EDBVQ1, it offers superior spatial resolution and thermal responsiveness in a smaller footprint - critical for inverter-integrated sensing.
Availability
TMP126EDCKRQ1 is available at Aetrix Electronics and suitable for transmission control units, on-board chargers, and traction inverters requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for TMP126EDCKRQ1 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 ICs, with decades of automotive qualification expertise and functional safety infrastructure.
The TMP126-Q1 product line was designed specifically for high-reliability thermal monitoring in AEC-Q100 Grade-0 automotive powertrain and charging systems, emphasizing accuracy stability at 175°C, SPI robustness, and autonomous alerting.
FAQ
What is the maximum ambient operating temperature supported by the TMP126EDCKRQ1?
The TMP126EDCKRQ1 supports an ambient operating temperature range from –55°C to +175°C, fully qualified per AEC-Q100 Grade-0. This specification is verified through HTOL testing at 175°C for 1410 hours and applies to the device's silicon die and package integrity - enabling direct placement on power modules, transmission housings, and exhaust-related components where conventional sensors fail.
Does the TMP126EDCKRQ1 require external calibration for automotive use?
No, the TMP126EDCKRQ1 is factory-calibrated with NIST-traceable equipment compliant with ISO/IEC 17025 standards. Its ±0.25°C accuracy from 20°C to 30°C and guaranteed error bands across the full –55°C to 175°C range eliminate the need for system-level calibration, reducing validation effort and improving long-term thermal measurement consistency in automotive ECUs.
How does the slew rate warning feature function in the TMP126EDCKRQ1?
The TMP126EDCKRQ1 monitors the positive change in temperature between consecutive conversions and compares it to a user-programmable Slew_Limit register value. When exceeded, it sets the Slew_Flag bit in Alert_Status and asserts the ALERT pin - enabling early intervention before reaching absolute thermal limits. This feature operates only in continuous mode and requires fixed conversion periods for deterministic timing.
Can the TMP126EDCKRQ1 operate from a 1.8 V supply rail?
Yes, the TMP126EDCKRQ1 supports a supply voltage range of 1.62 V to 5.5 V, making it fully compatible with 1.8 V microcontroller I/O domains. At 1.8 V, it maintains full functionality including SPI communication (with adjusted VIH/VIL thresholds), 14-bit resolution, and all alert features - verified across –55°C to 175°C ambient per AEC-Q100 test conditions.
Is CRC support mandatory or optional in the TMP126EDCKRQ1 SPI interface?
CRC support in the TMP126EDCKRQ1 is optional and enabled via the CRC_Enable bit in the command word. When activated, a 16-bit CRC is appended to read data and validated on write data - enhancing data integrity in electrically noisy automotive environments. CRC is disabled by default and can be omitted if system-level error checking is handled elsewhere.
TMP126EDCKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -55°C ~ 175°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 1.62V ~ 5.5V
- Resolution:
- 14 b
- Features:
- One-Shot, Programmable Limit, Shutdown Mode, Standby Mode
- Accuracy - Highest (Lowest):
- ±0.25°C (±0.75°C)
- Test Condition:
- 20°C ~ 30°C (150°C ~ 175°C)
- Operating Temperature:
- -55°C ~ 175°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- SC-70-6
TMP126EDCKRQ1 FAQ
1.How can I place an order for TMP126EDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP126EDCKRQ1 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 TMP126EDCKRQ1 reliable?
The price and inventory of TMP126EDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP126EDCKRQ1 is usually 5 days.
3.What payment methods are accepted for TMP126EDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP126EDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP126EDCKRQ1?
TMP126EDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP126EDCKRQ1 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 TMP126EDCKRQ1?
For technical support, including TMP126EDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP126EDCKRQ1 requirements.
6.How does Aetrix verify that TMP126EDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All TMP126EDCKRQ1 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 TMP126EDCKRQ1 meets industry standards.
7.What is the process for return or replacement of TMP126EDCKRQ1?
All TMP126EDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP126EDCKRQ1, 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 TMP126EDCKRQ1 part is unused and in its original packaging.
Return procedure for TMP126EDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TMP126EDCKRQ1 Tags
-
MCP9700T-E/TT
Microchip Technology
-
MCP9700T-E/LT
Microchip Technology
-
MCP9701T-E/TT
Microchip Technology
-
MCP9701T-E/LT
Microchip Technology
-
TMP235A4DBZR
Texas Instruments
-
MCP9700AT-E/TT
Microchip Technology
-
MCP9700AT-E/LT
Microchip Technology
-
MCP9701AT-E/LT
Microchip Technology
-
MCP9701AT-E/TT
Microchip Technology
,TO-226_straightlead.jpg)
-
LM335Z
STMicroelectronics
-
TMP1075NDRLR
Texas Instruments
-
TMP1075DGKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
