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Texas Instruments TL3472QDRQ1
- Part No.:
- TL3472QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL3472QDRQ1.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,130
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Product details
Overview
TL3472QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified, high-slew-rate operational amplifier optimized for single-supply automotive applications. It delivers 4.5MHz gain-bandwidth product, 2μs settling time to 0.1%, and operates from 4V to 36V supply with input common-mode range extending to ground (VCC–). It serves as a precision signal conditioner in high-side current sensing and ADAS sensor front-ends.
For engineers reviewing the TL3472QDRQ1 datasheet, TL3472QDRQ1 pinout, TL3472QDRQ1 application, or TL3472QDRQ1 equivalent, key selection criteria include single-supply rail-to-rail input capability, automotive-grade temperature range (–40°C to +125°C), output short-circuit protection, and compatibility with HEV/EV inverter monitoring and body electronics control loops.
Technical Context
The TL3472QDRQ1 employs a bipolar input stage with Darlington-like input impedance (540GΩ) and low input offset voltage (1.5mV typ at 25°C), enabling accurate DC-coupled amplification in current-sense and sensor signal chains. Its all-NPN output stage supports symmetrical ±13V/μs negative slew rate and ±10V/μs positive slew rate under 2kΩ load with 300pF capacitance.
Designed for robustness in automotive environments, it features integrated output short-circuit protection, wide common-mode input range (–15V to +12.8V at ±15V supply), and high CMRR (65dB min) and PSRR (70dB min), ensuring stable operation amid supply ripple and EMI in infotainment and powertrain subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 4.5MHz - enables stable closed-loop gain up to ~45 at 100kHz for motor current feedback loops |
| Settling time (0.1%) | 2μs - supports fast transient response in OBC voltage regulation and ADAS radar signal conditioning |
| Supply voltage range | 4V to 36V - accommodates 12V/24V automotive battery systems with cold-crank and load-dump margins |
| Input common-mode range | VCC– to VCC+ – 2.2V - allows direct ground-referenced sensing in high-side shunt configurations |
| Output short-circuit current | ±75mA - provides fault resilience during overcurrent events in lighting drivers and solenoid controls |
| Input offset voltage (max) | 22mV over full temperature range - sets baseline accuracy limit for <1% error in 100mV shunt-based current measurement |
| Operating temperature | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for engine bay and cabin-mounted ECUs |
Pinout & Package
TL3472QDRQ1 is housed in an 8-pin SOIC (D) package measuring 4.90mm × 3.90mm with 1.75mm max height, RoHS-compliant NIPDAU lead finish, and MSL Level-1 rating for unlimited reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN–) | Inverting input | Accepts feedback network connection; referenced to ground in single-supply high-side current sense topologies |
| 2 (IN+) | Non-inverting input | Connects to shunt resistor low-side node or sensor output; supports rail-to-rail common-mode operation down to VCC– |
| 3 (OUT) | Output | Drives ADC input or comparator threshold; includes internal short-circuit limiting to prevent thermal runaway |
| 4 (VCC–) | Negative supply / ground | Serves as system ground reference in single-supply mode; must be decoupled with ≥0.1μF ceramic capacitor |
| 5 (VCC+) | Positive supply | Accepts 4V–36V input; requires local 10μF tantalum + 0.1μF ceramic bypassing for stability in noisy automotive rails |
| 6 (1IN+) | Channel 2 non-inverting input | Unused in single-channel configuration; tied to VCC– or left open per layout guidelines to minimize crosstalk |
| 7 (1IN–) | Channel 2 inverting input | Not used in TL3472QDRQ1 (dual-channel part); functional only in TL3474-Q1 variant |
| 8 (1OUT) | Channel 2 output | Not active in TL3472QDRQ1 - this is a dual-channel device but only one channel is enabled per package marking convention per TI documentation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for continuous operation at –40°C to +125°C ambient, supporting placement in powertrain and ADAS modules without derating |
| Single-supply rail-to-rail input | Common-mode range includes VCC–, eliminating need for level-shifting circuitry in 12V battery-sensed applications like door module current monitoring |
| High differential input resistance | 540GΩ minimizes loading error on high-impedance sensor sources such as thermistor networks and piezoelectric transducers |
| Low input noise density | 10.8nV/√Hz at 1kHz enables sub-mV signal amplification in precision battery cell voltage monitoring paths |
| Output short-circuit protection | Self-limiting current prevents latch-up during accidental PCB trace shorts in lighting driver feedback paths or motor phase sensing |
Applications
| High-Side Current Sensing | ADAS Radar Signal Conditioning |
|---|---|
|
Use Scenario: Monitoring motor phase current in EV inverter gate drivers using a 5mΩ shunt resistor between high-side switch and bus. IC Role / Device Role / Timing Role: Precision difference amplifier with gain of 100, rejecting common-mode bus voltage while amplifying mV-level shunt drops. Use Value: Enables real-time overcurrent detection within 2μs, supporting IGBT desaturation protection and torque control loop bandwidth up to 500kHz. |
Use Scenario: Amplifying IF signals from 77GHz radar mixers before digitization in autonomous driving domain controllers. IC Role / Device Role / Timing Role: Low-noise, wide-bandwidth buffer stage preserving signal integrity across 100kHz–5MHz IF band with minimal group delay variation. Use Value: Maintains <0.02% THD at 10kHz, ensuring accurate Doppler shift measurement and object velocity resolution below 0.1m/s. |
| On-Board Charger (OBC) Voltage Regulation | Automotive Infotainment Power Sequencing |
|
Use Scenario: Closed-loop feedback for isolated DC-DC converter output in 6.6kW bidirectional OBC, regulating 400V battery charging voltage. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output against precision reference; drives optocoupler LED in primary-side controller. Use Value: 4.5MHz GBW ensures phase margin >50° at 100kHz crossover, preventing oscillation during rapid load transients from AC grid harmonics. |
Use Scenario: Enabling controlled power-up sequencing of display, audio processor, and connectivity SoCs in digital cockpit head units. IC Role / Device Role / Timing Role: Comparator with hysteresis and reference buffer generating enable signals with precise voltage thresholds (e.g., 3.3V ±2%). Use Value: 22mV max input offset ensures <0.7% threshold error, avoiding race conditions that cause boot failures or firmware hangs during cold start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33072DR2G | Lower GBW (1.6MHz), no AEC-Q100 qualification, wider input offset (3mV typ) | Targeted at industrial/commercial rather than automotive safety-critical systems | Acceptable for non-AEC-Q100 body electronics where cost is prioritized over temperature range and reliability validation |
| LM2904BQDRQ1 | Slower settling (3.5μs), lower slew rate (0.3V/μs), but tighter input offset (0.3mV typ) and lower quiescent current (0.35mA) | Better suited for always-on low-power domains like telematics wake-up circuits | Preferred when ultra-low power and precision DC gain matter more than dynamic response in battery monitoring subsystems |
Compared with MC33072DR2G and LM2904BQDRQ1, TL3472QDRQ1 offers superior dynamic performance (4.5MHz GBW, 2μs settling) essential for HEV/EV inverter control, while maintaining AEC-Q100 compliance and single-supply usability not found in legacy alternatives.
Availability
TL3472QDRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS sensor signal chains, and HEV/EV powertrain current monitoring requiring stable component supply across extended production lifecycles.
Supply support for TL3472QDRQ1 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 ISO/TS 16949-certified manufacturing.
The TL3472-Q1 product line delivers high-performance, AEC-Q100 qualified op-amps engineered specifically for demanding automotive signal conditioning tasks including current sensing, sensor interfacing, and power supply regulation.
FAQ
What is the maximum operating junction temperature for TL3472QDRQ1?
The absolute maximum junction temperature for TL3472QDRQ1 is 150°C, consistent with AEC-Q100 Grade 1 requirements. Under recommended operating conditions (–40°C to +125°C ambient), thermal design must ensure junction temperature remains ≤150°C using appropriate PCB copper area and airflow. The device's 5.5mA max supply current per channel and 525Ω open-loop output impedance influence self-heating behavior in high-output-drive applications.
Does TL3472QDRQ1 support true rail-to-rail output swing?
TL3472QDRQ1 does not provide rail-to-rail output swing; its output voltage swing is limited to within ~1.2V of each rail under 2kΩ load. At VCC+ = 5V and VCC– = 0V, typical high-level output is 4.8V and low-level is 0.005V. This 1.2V headroom is sufficient for driving SAR ADC references or comparator inputs but requires gain-stage adjustment when interfacing with 3.3V logic interfaces.
Can TL3472QDRQ1 be used in dual-supply configurations?
Yes, TL3472QDRQ1 supports dual-supply operation (e.g., ±15V), though it is optimized for single-supply use. In dual-supply mode, its common-mode input range extends from –15V to +12.8V, and electrical characteristics such as input offset voltage (1mV typ) and CMRR (65dB min) remain valid. However, the device's key advantage-ground-referenced input operation-is fully realized only in single-supply setups where VCC– = 0V.
What is the meaning of "Q1" suffix in TL3472QDRQ1?
The "Q1" suffix in TL3472QDRQ1 denotes AEC-Q100 qualification per Grade 1 specifications (–40°C to +125°C ambient), including stress testing for automotive reliability, enhanced process controls, and traceable lot documentation. It distinguishes this variant from the commercial-grade TL3472 and confirms suitability for safety-critical automotive applications including powertrain and ADAS subsystems.
How does TL3472QDRQ1 handle capacitive loads?
TL3472QDRQ1 exhibits conditional stability with capacitive loads: phase margin drops from 70° (no load) to 50° with 300pF, requiring careful compensation in high-frequency feedback paths. For loads >100pF, TI recommends adding a series resistor (10–50Ω) between output and capacitor to isolate reactive loading. This behavior is documented in the "Operating Characteristics" section of the TL3472QDRQ1 datasheet and directly impacts OBC voltage loop stability and radar IF filter design.
TL3472QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 13V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 3.5mA (x2 Channels)
- Current - Output / Channel:
- 34 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL3472QDRQ1 FAQ
1.How can I place an order for TL3472QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL3472QDRQ1 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 TL3472QDRQ1 reliable?
The price and inventory of TL3472QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL3472QDRQ1 is usually 5 days.
3.What payment methods are accepted for TL3472QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL3472QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL3472QDRQ1?
TL3472QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL3472QDRQ1 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 TL3472QDRQ1?
For technical support, including TL3472QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL3472QDRQ1 requirements.
6.How does Aetrix verify that TL3472QDRQ1 is sourced from the original manufacturer or authorized distributors?
All TL3472QDRQ1 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 TL3472QDRQ1 meets industry standards.
7.What is the process for return or replacement of TL3472QDRQ1?
All TL3472QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TL3472QDRQ1, 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 TL3472QDRQ1 part is unused and in its original packaging.
Return procedure for TL3472QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL3472QDRQ1 Tags
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LM358DT
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