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Texas Instruments TMP709AQDBVRQ1
- Part No.:
- TMP709AQDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TMP709AQDBVRQ1.pdf
- Description:
- THERMOSTAT PROG ACT LOW SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,800
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Product details
Overview
TMP709AQDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade resistor-programmable temperature switch in SOT-23 (5-pin) package, featuring ±0.5°C typical threshold accuracy, 40 µA typical quiescent current, and pin-selectable 2°C or 10°C hysteresis - used for overtemperature protection in engine control units and battery management systems.
For engineers reviewing the TMP709AQDBVRQ1 datasheet, TMP709AQDBVRQ1 pinout, TMP709AQDBVRQ1 application, or TMP709AQDBVRQ1 equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, automotive-qualified alternatives, and supply-chain support for production deployment.
Technical Context
The TMP709AQDBVRQ1 implements a dual-reference architecture: one positive tempco voltage reference controlled by external RSET, and one negative tempco reference; trip occurs when the former exceeds the latter. Its comparator drives an internal NFET open-drain output stage on the OT pin.
Hysteresis is digitally selected via the HYST pin (VCC = 10°C, GND = 2°C), directly altering the positive reference voltage to prevent oscillation near threshold. The device operates across 2.7 V to 5.5 V and guarantees functionality down to VCC = 0.8 V for reset behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - supports direct connection to common automotive rail voltages without regulation. |
| Threshold Accuracy | ±0.5°C typical, ±3.5°C max (60°C–100°C) - enables precise thermal shutdown in safety-critical power stages. |
| Quiescent Current | 40 µA typical - allows continuous monitoring in always-on vehicle subsystems with minimal battery drain. |
| Hysteresis Options | 2°C or 10°C (pin-selectable) - prevents chatter during slow thermal transients in motor drivers or DC/DC converters. |
| Output Type | Open-drain, active-low OT - interfaces directly with microcontroller interrupt inputs or logic-level enable pins. |
| Operating Temp Range | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and powertrain applications. |
| ESD Rating | HBM ±4000 V, CDM ±1000 V - meets automotive robustness requirements for assembly and field operation. |
Pinout & Package
Package: 5-pin SOT-23 (DBV), body size 2.90 mm × 1.60 mm, 1.45 mm max height, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SET (Pin 1) | Analog input | Connects external 1% resistor to GND to program trip point from 0°C to 125°C; sets positive tempco reference voltage. |
| GND (Pin 2) | Analog power ground | Reference node for internal references and RSET; must be low-impedance connection to system ground plane. |
| OT (Pin 3) | Digital output | Open-drain, active-low output; sinks up to 12 mA; requires external pullup (≥10 kΩ) to VCC or host logic rail. |
| HYST (Pin 4) | Digital input | Selects hysteresis: tie to VCC for 10°C, tie to GND for 2°C; floating or intermediate voltages cause malfunction. |
| VCC (Pin 5) | Analog power supply | 2.7 V–5.5 V input; bypass with 0.1 µF capacitor placed adjacent to pin to suppress supply noise-induced trip errors. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±4000 V, CDM ±1000 V - suitable for engine control, transmission, and ADAS modules. |
| Resistor-programmable threshold | Single 1% external RSET sets trip point across full 0°C–125°C range - eliminates need for trimming or calibration in production. |
| Low-power operation | 40 µA typical ICC at 5 V - enables integration into always-on domains like battery disconnect controllers without compromising standby time. |
| Reset operation at 0.8 V | Guaranteed functional reset behavior even during brownout conditions - ensures reliable cold-start sequencing in automotive ECUs. |
| Pin-selectable hysteresis | Hardware-configured 2°C or 10°C hysteresis - avoids firmware dependency and provides deterministic thermal response in safety-critical paths. |
Applications
| Engine Control Unit Thermal Monitoring | Battery Management System Overtemp Protection |
|---|---|
|
Use Scenario: Real-time monitoring of IGBT gate driver temperature in 48 V mild-hybrid engine control units. IC Role / Device Role / Timing Role: Temperature switch providing hardware-level overtemperature fault signal to MCU interrupt pin. Use Value: Enables immediate shutdown before silicon damage occurs; ±0.5°C accuracy ensures margin against thermal derating limits. |
Use Scenario: Cell-level overtemperature detection in high-voltage traction battery packs during fast charging. IC Role / Device Role / Timing Role: Standalone thermal cutoff with 10°C hysteresis to prevent repeated cycling during thermal soak. Use Value: 40 µA quiescent current minimizes self-heating error; SOT-23 footprint allows placement directly on cell module PCB. |
| Automotive Infotainment Power Supply Supervision | Electric Power Steering Motor Driver Protection |
|
Use Scenario: Monitoring DC/DC converter temperature in head-unit power supply to prevent thermal runaway. IC Role / Device Role / Timing Role: Hardware watchdog that asserts active-low OT signal to disable regulator enable line. Use Value: Pin-selectable 2°C hysteresis avoids nuisance trips during transient load spikes while maintaining tight thermal guardband. |
Use Scenario: Detecting MOSFET junction overheating in EPS motor driver half-bridges during sustained assist torque. IC Role / Device Role / Timing Role: Local thermal sensor interfacing directly with motor controller's fault-handling logic. Use Value: AEC-Q100 qualification ensures reliability in vibration-prone steering column environment; open-drain output simplifies isolation interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMM/NOPB | I²C digital output, fixed 75°C threshold, no external resistor programming, ±2°C accuracy, 250 µA ICC. | Requires MCU firmware polling; unsuitable for hardware-only fault response or variable threshold needs. | Choose only if I²C bus access and fixed threshold are acceptable; not drop-in for TMP709AQDBVRQ1. |
| MAX6505UTP+T | Fixed-threshold (125°C), no hysteresis selection, 12 µA ICC, SC70-5 package, ±3°C accuracy. | Lacks programmability and configurable hysteresis; limited to single-point overtemperature cutoff. | Use where ultra-low power and simple 125°C cutoff suffice; cannot replace TMP709AQDBVRQ1 in adaptive thermal schemes. |
Compared with LM75BIMM/NOPB and MAX6505UTP+T, the TMP709AQDBVRQ1 uniquely combines resistor-programmable threshold, pin-selectable hysteresis, automotive qualification, and sub-50 µA quiescent current - making it the only option for hardware-triggered, adaptable thermal protection in AEC-Q100 systems.
Availability
TMP709AQDBVRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, battery management, infotainment thermal supervision, and electric power steering requiring stable component supply across extended product lifecycles.
Supply support for TMP709AQDBVRQ1 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 delivering analog and embedded processing solutions, with leadership in automotive, industrial, and power management technologies.
The TMP709-Q1 belongs to TI's automotive temperature sensor portfolio, designed specifically for hardware-based overtemperature protection in safety-critical vehicle subsystems where firmware-independent thermal response is mandatory.
FAQ
What is the exact trip temperature range supported by the TMP709AQDBVRQ1?
The TMP709AQDBVRQ1 supports a programmable trip temperature range from 0°C to 125°C, set by a single external 1% resistor (RSET) connected between the SET pin and GND. The relationship follows RSET(kΩ) = 0.0012T² – 0.9308T + 96.147, where T is the desired threshold in °C. This range is fully validated across the device's –40°C to +125°C operating ambient.
How does the HYST pin affect hysteresis behavior in the TMP709AQDBVRQ1?
In the TMP709AQDBVRQ1, the HYST pin is a digital input: connecting it to VCC selects 10°C hysteresis, while connecting it to GND selects 2°C hysteresis. This selection alters the internal positive tempco reference voltage after trip to prevent oscillation. Floating or intermediate voltages on HYST may cause abnormal supply current or malfunction - TI explicitly requires hard connection to VCC or GND.
Can the TMP709AQDBVRQ1 operate reliably below 2.7 V?
The TMP709AQDBVRQ1 is specified for normal operation between 2.7 V and 5.5 V. However, its reset functionality is guaranteed down to VCC = 0.8 V - meaning the device retains ability to assert the OT output during brownout conditions. Below 2.7 V, trip accuracy, hysteresis, and quiescent current are not characterized; sustained operation below 2.7 V is not recommended for thermal monitoring.
What is the maximum recommended pullup resistance for the OT pin of the TMP709AQDBVRQ1?
The OT pin of the TMP709AQDBVRQ1 is an open-drain output rated for 12 mA sink current. TI recommends a pullup resistor ≥10 kΩ to minimize internal power dissipation. While larger values (up to 470 kΩ) are permissible, exceeding 470 kΩ risks slow rise time and noise susceptibility. For 3.3 V logic interfaces, 10 kΩ–100 kΩ is optimal; for 5 V, 22 kΩ–100 kΩ balances speed and power.
Is the TMP709AQDBVRQ1 pin-compatible with non-automotive variants like TMP709?
Yes - the TMP709AQDBVRQ1 shares identical pinout, package (SOT-23-5 DBV), and electrical characteristics with the catalog TMP709, except for AEC-Q100 qualification, enhanced ESD ratings (HBM ±4000 V), and extended temperature validation (–40°C to +125°C). No PCB layout change is required when upgrading from TMP709 to TMP709AQDBVRQ1 in automotive designs.
TMP709AQDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- Programmable
- Accuracy:
- ±3°C
- Current - Output (Max):
- 20mA
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Trip Point
- Voltage - Supply:
- 2.7 V ~ 5.5 V
- Current - Supply:
- 40µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- SOT-23-5
TMP709AQDBVRQ1 FAQ
1.How can I place an order for TMP709AQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP709AQDBVRQ1 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 TMP709AQDBVRQ1 reliable?
The price and inventory of TMP709AQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP709AQDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TMP709AQDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP709AQDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP709AQDBVRQ1?
TMP709AQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP709AQDBVRQ1 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 TMP709AQDBVRQ1?
For technical support, including TMP709AQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP709AQDBVRQ1 requirements.
6.How does Aetrix verify that TMP709AQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TMP709AQDBVRQ1 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 TMP709AQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TMP709AQDBVRQ1?
All TMP709AQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP709AQDBVRQ1, 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 TMP709AQDBVRQ1 part is unused and in its original packaging.
Return procedure for TMP709AQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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