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Texas Instruments TLV1812QDGKRQ1
- Part No.:
- TLV1812QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TLV1812QDGKRQ1.pdf
- Description:
- AUTOMOTIVE, DUAL MICROPOWER HIGH
- Quantity:
- Payment:
- Shipping:
Inventory:1,932
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Product details
Overview
TLV1812QDGKRQ1 from Texas Instruments is an automotive-grade dual-channel rail-to-rail input comparator with push-pull output, qualified per AEC-Q100 Grade 1 (–40°C to +125°C), operating from 2.4V to 40V supply, consuming only 5μA per channel, and delivering 420ns typical propagation delay. It integrates Power-On Reset (POR) for deterministic startup and is used in HEV/EV powertrain monitoring circuits where supply voltage stability and fast response to overvoltage/undervoltage conditions are critical.
For engineers reviewing the TLV1812QDGKRQ1 datasheet, TLV1812QDGKRQ1 pinout, TLV1812QDGKRQ1 application, or TLV1812QDGKRQ1 equivalent, key selection considerations include its 40V absolute maximum supply rating, rail-to-rail input range extending 200mV beyond rails, push-pull output capable of sourcing/sinking ≥4mA, POR threshold at 1.7V, and VSSOP-8 package compatibility with space-constrained automotive PCB layouts.
Technical Context
The TLV1812QDGKRQ1 implements a dual independent comparator architecture with separate IN1±/IN2± inputs and OUT1/OUT2 outputs, each featuring internal biasing and dedicated POR circuitry ensuring both channels enter a known high-impedance or defined logic state during supply ramp-up. Its rail-to-rail input stage uses ESD clamps referenced to V− and V+, limiting valid common-mode range to (V−) − 0.2V to (V+) + 0.2V.
As a push-pull device, TLV1812QDGKRQ1 drives outputs actively high and low without external pull-ups; output swing is specified as ≤250mV from V− (sinking) and ≤250mV from V+ (sourcing) at 4mA load across temperature. Input offset voltage is ±0.5mV typ (±4mV max over temp), and PSRR is 100dB - enabling stable operation in noisy 12V/24V/48V automotive battery domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.4V to 40V - supports direct connection to automotive battery rails including cold-crank (≈6V) and load-dump (up to 40V) transients without external regulation. |
| Quiescent Current | 5μA per channel - enables always-on monitoring in battery-sensitive systems like body control modules with negligible standby drain. |
| Propagation Delay | 420ns typical (at 100mV overdrive, CL = 50pF) - provides sub-microsecond response for real-time fault detection in motor control or DC-DC converter feedback loops. |
| Input Offset Voltage | ±0.5mV typical (±4mV max, –40°C to +125°C) - ensures accurate threshold detection in precision voltage supervision applications such as battery cell balancing or sensor signal conditioning. |
| Power-On Reset Threshold | 1.7V - guarantees output remains in known state until supply stabilizes above functional minimum, preventing false triggers during ignition sequencing. |
| Rail-to-Rail Input Range | (V−) − 0.2V to (V+) + 0.2V - allows direct interfacing with sensors or dividers operating near supply rails without level-shifting circuitry. |
| Output Drive Capability | Sinks/sources ≥4mA - directly drives LEDs, small MOSFET gates, or logic inputs without external buffers in compact automotive subsystems. |
Pinout & Package
VSSOP-8 package (3.00mm × 3.00mm body, 0.65mm pitch); thermally enhanced with exposed die pad connected directly to V− for improved power dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Push-pull output of comparator 1 - actively drives high/low; must not be wired in parallel with other outputs. |
| 2 | IN1− | Inverting input of comparator 1 - accepts signals down to 0.2V below V−; requires current limiting if driven beyond supply rails. |
| 3 | IN1+ | Non-inverting input of comparator 1 - same rail-to-rail range as IN1−; unused channels must be biased with ≥50mV differential voltage. |
| 4 | V− | Negative supply terminal and thermal pad connection point - all internal ESD clamps reference this node; exposed pad must be soldered to PCB ground plane. |
| 5 | IN2+ | Non-inverting input of comparator 2 - electrically identical to IN1+; supports independent dual-threshold sensing (e.g., high/low battery warning). |
| 6 | IN2− | Inverting input of comparator 2 - paired with IN2+ for second independent comparison function. |
| 7 | OUT2 | Push-pull output of comparator 2 - fully independent of OUT1; enables dual-fault reporting (e.g., overvoltage AND undervoltage flags). |
| 8 | V+ | Positive supply terminal - accepts up to 40V; internal POR circuit monitors this pin to determine valid operating voltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for continuous operation from –40°C to +125°C ambient, meeting automotive powertrain and chassis system reliability requirements. |
| 40V absolute maximum supply rating | Withstands automotive load-dump transients (ISO 7637-2 Pulse 5a) without damage or latch-up, eliminating need for external TVS protection in many designs. |
| Integrated Power-On Reset (POR) | Ensures both outputs remain in defined state until V+ exceeds 1.7V, preventing spurious logic transitions during engine start or battery reconnection. |
| Rail-to-rail input with 200mV overvoltage tolerance | Accepts sensor signals or divider outputs that swing to within 200mV of either supply rail, simplifying interface design for wide-input-range automotive sensors. |
| Push-pull output with 4mA drive strength | Directly interfaces with 3.3V/5V logic families, LED indicators, or MOSFET gate drivers without pull-up resistors - reducing BOM count and board area. |
| 5μA per channel quiescent current | Enables permanent connection to vehicle battery for always-on functions (e.g., intrusion detection, battery health monitoring) with <10μA total system standby current. |
Applications
| HEV/EV Battery Supervision | Infotainment Power Sequencing |
|---|---|
Use Scenario: Monitoring high-voltage battery pack voltage against upper/lower thresholds to trigger isolation contactor control or thermal management alerts. IC Role / Device Role / Timing Role: Dual comparator providing simultaneous overvoltage and undervoltage detection with sub-500ns response time and guaranteed startup behavior. Use Value: Eliminates need for discrete voltage references and op-amp comparators, reducing component count while maintaining ASIL-B compatible fault response timing. |
Use Scenario: Controlling power-up sequence of display, audio processor, and connectivity ICs in automotive head units using monitored 5V and 3.3V rails. IC Role / Device Role / Timing Role: Precision window comparator generating enable signals only when all supplies reach valid levels, with POR ensuring clean initialization. Use Value: Prevents firmware lockups caused by partial power-up; rail-to-rail inputs allow direct sensing of unregulated intermediate rails without scaling resistors. |
| Body Control Module (BCM) Load Monitoring | ADAS Camera Power Validation |
Use Scenario: Detecting open-circuit or short-circuit faults in LIN bus-controlled lighting loads by comparing expected vs. actual current-sense voltage. IC Role / Device Role / Timing Role: High-speed comparator comparing shunt voltage against programmable thresholds, with push-pull output driving microcontroller interrupt pins. Use Value: Enables real-time load diagnostics without CPU polling; 40V rating allows direct connection to 24V truck BCM systems. |
Use Scenario: Validating 12V camera power supply before enabling image sensor and ISP, preventing corrupted frame capture during brownout conditions. IC Role / Device Role / Timing Role: Single-supply comparator with POR ensuring camera enable signal asserts only after stable 12V is confirmed, with 420ns delay enabling fast fault recovery. Use Value: Reduces boot-time failures in vision-based ADAS; VSSOP-8 footprint fits tight space constraints behind rearview mirrors or grilles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel automotive comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1822QDGKRQ1 | Open-drain output instead of push-pull; supports 40V pull-up independent of supply voltage. | Required when output must interface with higher-voltage logic (e.g., 24V CAN transceiver enable) or perform wired-OR functions. | Choose TLV1822QDGKRQ1 only if open-drain functionality is needed; TLV1812QDGKRQ1 is preferred for direct logic-level interfacing or LED driving. |
| LM2903QDRQ1 | Higher quiescent current (800μA vs. 5μA), slower propagation delay (1.5μs min), no POR, wider offset (±7mV). | Suitable for cost-sensitive non-always-on applications where micro-power and precise startup timing are not required. | LM2903QDRQ1 offers legacy pin compatibility but lacks TLV1812QDGKRQ1's micro-power operation, rail-to-rail inputs, and POR - use only when upgrading existing LM2903 designs with relaxed specs. |
Compared with TLV1822QDGKRQ1, TLV1812QDGKRQ1 provides active high-drive capability essential for direct MCU interfacing, while LM2903QDRQ1 trades performance for cost and availability in less demanding automotive subsystems.
Availability
TLV1812QDGKRQ1 is available at Aetrix Electronics and suitable for HEV/EV battery management, infotainment power sequencing, and body control module applications requiring stable component supply with full AEC-Q100 compliance and long-term automotive lifecycle support.
Supply support for TLV1812QDGKRQ1 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 electronics, power management, and precision signal chain solutions.
The TLV1812QDGKRQ1 belongs to TI's automotive-qualified comparator portfolio designed specifically for reliable voltage monitoring and fault detection in harsh automotive environments - emphasizing low power, high voltage tolerance, and functional safety readiness.
FAQ
What is the absolute maximum supply voltage rating for TLV1812QDGKRQ1?
The TLV1812QDGKRQ1 has an absolute maximum supply voltage (V+ to V−) of 42V, with recommended operating range from 2.4V to 40V. This 40V operating ceiling allows direct integration into 24V commercial vehicle systems and withstands ISO 7637-2 load-dump transients without external protection, making TLV1812QDGKRQ1 suitable for under-hood powertrain applications where transient robustness is critical.
Does TLV1812QDGKRQ1 include Power-On Reset (POR), and what is its threshold?
Yes, TLV1812QDGKRQ1 integrates a dedicated Power-On Reset circuit with a nominal threshold of 1.7V on the V+ pin. This ensures both comparator outputs remain in a known state - neither floating nor oscillating - until the supply reaches functional voltage, preventing erroneous signals during engine cranking or battery reconnection. The POR feature is inherent to TLV1812QDGKRQ1 and requires no external components.
Can TLV1812QDGKRQ1 drive a MOSFET gate directly?
Yes, TLV1812QDGKRQ1's push-pull output can source and sink ≥4mA, enabling direct drive of small-signal MOSFET gates (e.g., SiC or GaN driver enable inputs) without external buffers. Its 250mV VOL/VOH specification at 4mA ensures clean logic-level transitions. However, for high-capacitance gates (>1nF), external gate resistors may be needed to control slew rate and prevent ringing - a capability unique to TLV1812QDGKRQ1 among micro-power comparators.
What is the input voltage range specification for TLV1812QDGKRQ1?
TLV1812QDGKRQ1 features true rail-to-rail inputs with a common-mode range from (V−) − 0.2V to (V+) + 0.2V. This allows direct connection to sensors, resistive dividers, or battery terminals without level-shifting circuitry. Input overvoltage beyond these limits must be current-limited to ≤10mA due to internal ESD clamps - a design constraint explicitly defined for TLV1812QDGKRQ1 in its absolute maximum ratings table.
Is TLV1812QDGKRQ1 pin-compatible with any legacy comparators?
No, TLV1812QDGKRQ1 is not pin-compatible with standard SOIC-8 or TSSOP-8 dual comparators like LM2903 or TLC372 due to its VSSOP-8 footprint (3.0mm × 3.0mm) and specific pin mapping (e.g., V− on pin 4, exposed thermal pad). However, it shares functional equivalence with TLV1812-Q1 variants - TLV1812QDGKRQ1 is the AEC-Q100 qualified version optimized for automotive use, with identical pinout and electrical behavior as non-automotive TLV1812IDGKR.
TLV1812QDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2.4V ~ 40V
- :
- 3mV @ 12V
- Voltage - Input Offset (Max):
- 0.001µA @ 12V
- Current - Input Bias (Max):
- 30mA @ 12V
- Current - Output (Typ):
- 9µA
- Current - Quiescent (Max):
- 100dB PSRR
- CMRR, PSRR (Typ):
- 900ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-VSSOP
TLV1812QDGKRQ1 FAQ
1.How can I place an order for TLV1812QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1812QDGKRQ1 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 TLV1812QDGKRQ1 reliable?
The price and inventory of TLV1812QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1812QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for TLV1812QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1812QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1812QDGKRQ1?
TLV1812QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1812QDGKRQ1 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 TLV1812QDGKRQ1?
For technical support, including TLV1812QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1812QDGKRQ1 requirements.
6.How does Aetrix verify that TLV1812QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All TLV1812QDGKRQ1 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 TLV1812QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of TLV1812QDGKRQ1?
All TLV1812QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV1812QDGKRQ1, 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 TLV1812QDGKRQ1 part is unused and in its original packaging.
Return procedure for TLV1812QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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