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Texas Instruments TLV1811QDCKRQ1
- Part No.:
- TLV1811QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TLV1811QDCKRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE-CHANNEL MICRO
- Quantity:
- Payment:
- Shipping:
Inventory:1,225
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Product details
Overview
TLV1811QDCKRQ1 from Texas Instruments is an automotive-grade single-channel rail-to-rail input comparator with push-pull output, qualified to 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 features 500μV max input offset voltage - used in HEV/EV battery monitoring, body control module voltage supervision, and infotainment power sequencing.
For engineers reviewing the TLV1811QDCKRQ1 datasheet, TLV1811QDCKRQ1 pinout, TLV1811QDCKRQ1 application, or TLV1811QDCKRQ1 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 official SNOSDC9D datasheet and package documentation.
Technical Context
The TLV1811QDCKRQ1 implements a rail-to-rail input stage with internal ESD clamps limiting differential input voltage to ±0.2V beyond V−/V+, and includes a dedicated POR circuit that holds output in a known state until V+ reaches ≥1.7V. Its push-pull output actively sinks and sources current (±4mA min at 125°C), enabling direct LED drive or MOSFET gate control without external pull-ups.
This device belongs to the TLV181x-Q1 family - distinct from TLV182x-Q1 open-drain variants - and is specified for full 2.4V–40V operation with stable quiescent current across temperature (6–11μA over –40°C to +125°C). Input bias current remains ultra-low (150fA typ, ≤1.2nA max), supporting high-impedance sensing in battery management systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.4V to 40V - supports direct connection to 12V/24V/42V automotive rails without regulation. |
| Quiescent Current | 5μA per channel (typ) - enables always-on voltage monitoring in low-power wake-up circuits. |
| Propagation Delay | 420ns (typ, 100mV overdrive, CL = 50pF) - ensures fast response for battery cell overvoltage detection. |
| Input Offset Voltage | ±0.5mV (typ), ±4mV (max, –40°C to +125°C) - enables accurate threshold comparison in precision power supervision. |
| Input Common-Mode Range | V− − 0.2V to V+ + 0.2V - allows sensing signals referenced to ground or V+ in mixed-supply systems. |
| Output Type | Push-pull - eliminates need for external pull-up resistors and supports bidirectional drive of LEDs or logic inputs. |
| Power-On Reset Threshold | 1.7V (min) - guarantees clean, chatter-free startup during cold-cranking or slow-battery ramp conditions. |
Pinout & Package
TLV1811QDCKRQ1 is packaged in SC-70-5 (DCK), with 1.25mm × 2.00mm body size and thermal performance characterized by RθJA = 226.0°C/W. Pinout follows standard "North West" configuration for SC-70/SOT-23-5 packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | Push-pull output capable of sinking/source up to 4mA; directly drives LEDs, logic gates, or MOSFET gates. |
| 2 - V− | Negative Supply | Ground or low-side rail reference; exposed thermal pad (in DCK) must be connected to V− for thermal integrity. |
| 3 - IN+ | Non-Inverting Input | High-impedance (150fA bias) input accepting signals from V− − 0.2V to V+ + 0.2V. |
| 4 - IN− | Inverting Input | Matches IN+ in range and impedance; unused channels require ≥50mV differential bias to prevent chatter. |
| 5 - V+ | Positive Supply | Accepts up to 40V; powers internal bias, POR, and output stage - no external decoupling required for basic operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive powertrain and body electronics requirements. |
| Rail-to-rail input with POR | Guarantees known output state during power ramp-up/down - prevents false triggers in battery disconnect or ignition sequencing. |
| 40V absolute max supply rating | Withstands load-dump transients up to 42V - eliminates need for external TVS in 24V system front-end protection. |
| 5μA quiescent current | Enables continuous monitoring in always-on domains (e.g., smart junction boxes) with <1µW per channel power budget. |
| Push-pull output architecture | Drives capacitive loads (e.g., MOSFET gates) without pull-up resistors - reduces BOM count and improves rise/fall time consistency. |
Applications
| Battery Cell Overvoltage Detection | Engine Control Unit (ECU) Power Supervision |
|---|---|
|
Use Scenario: Monitoring individual Li-ion or lead-acid cell voltages in 12V/48V HEV battery packs to trigger isolation relays before overvoltage damage. IC Role / Device Role / Timing Role: Comparator compares cell voltage against precision reference; 420ns delay ensures timely response to fast transients. Use Value: Enables compliance with ISO 26262 ASIL-B functional safety goals via deterministic POR behavior and rail-to-rail input tolerance. |
Use Scenario: Validating main 12V supply stability before enabling microcontroller reset release and peripheral initialization in engine ECUs. IC Role / Device Role / Timing Role: Acts as power-good detector with hysteresis; POR ensures output remains low until V+ exceeds 1.7V. Use Value: Prevents erratic MCU boot behavior during cranking or alternator ripple - eliminating field returns due to brownout resets. |
| Infotainment System Wake-Up Trigger | Body Control Module (BCM) Load Switch Monitor |
|
Use Scenario: Detecting door handle capacitance change or key fob RF signal envelope to wake infotainment head unit from deep sleep. IC Role / Device Role / Timing Role: Low-power comparator amplifies weak analog sensor signals; 5μA IQ extends battery backup runtime. Use Value: Reduces standby current in parked vehicle mode - extending 12V battery life beyond 30 days without recharge. |
Use Scenario: Verifying correct turn-on/off of high-side load switches (e.g., lighting, HVAC) by comparing sense resistor voltage against threshold. IC Role / Device Role / Timing Role: Serves as fault comparator in current-sense feedback loop; push-pull output directly drives diagnostic GPIO. Use Value: Eliminates external pull-up resistor and associated leakage - improving accuracy of millivolt-level current measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1811DBVRQ1 | SOT-23-5 package (1.60mm × 2.90mm); identical electrical specs and pinout; higher RθJA (203.4°C/W) than DCK. | Better suited for manual assembly or legacy PCB footprints requiring SOT-23; same thermal derating applies above 50mW. | Select when board layout uses SOT-23 pads or requires larger solder joint area for mechanical reliability. |
| TLV1821QDCKRQ1 | Same SC-70-5 package but open-drain output; supports 40V pull-up independent of V+; no sourcing capability. | Required where wired-OR logic, level translation, or high-voltage (e.g., CAN bus) interface is needed - not drop-in replaceable. | Choose only when system design explicitly requires open-drain behavior; not interchangeable with TLV1811QDCKRQ1 in push-pull circuits. |
Compared with TLV1811DBVRQ1, TLV1811QDCKRQ1 offers superior thermal resistance in space-constrained modules, while TLV1821QDCKRQ1 provides essential open-drain flexibility at the cost of losing sourcing capability - making each alternative suitable only for specific architectural needs, not generic substitution.
Availability
TLV1811QDCKRQ1 is available at Aetrix Electronics and suitable for HEV/EV battery management, infotainment power sequencing, and body control module voltage supervision requiring stable component supply across automotive production lifecycles.
Supply support for TLV1811QDCKRQ1 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 and embedded processing technologies, with decades of automotive qualification expertise and AEC-Q100-compliant product development infrastructure.
The TLV1811QDCKRQ1 belongs to TI's automotive comparator portfolio designed specifically for robust, low-power voltage monitoring in harsh environments - targeting functional safety-aware systems in powertrain, chassis, and body electronics.
FAQ
What is the maximum supply voltage rating for TLV1811QDCKRQ1?
The TLV1811QDCKRQ1 has an absolute maximum supply voltage (V+ to V−) of 42V, with recommended operation up to 40V. This rating allows direct integration into 24V commercial vehicle systems and withstands ISO 7637-2 load-dump transients without external clamping - a key requirement for under-hood applications where TLV1811QDCKRQ1 is commonly deployed.
Does TLV1811QDCKRQ1 support rail-to-rail input operation, and what are its limits?
Yes, TLV1811QDCKRQ1 supports rail-to-rail input operation from V− − 0.2V to V+ + 0.2V across the full temperature range. This enables accurate sensing of signals near supply rails - such as battery terminal voltage or regulated 3.3V references - without phase inversion or clipping, a critical capability confirmed in Section 7.4.1.1 of the TLV1811QDCKRQ1 datasheet.
How does the Power-On Reset (POR) function work in TLV1811QDCKRQ1?
The TLV1811QDCKRQ1 incorporates an internal POR circuit that holds the output in a known low state until V+ rises above 1.7V. This prevents false triggering during slow power ramps (e.g., cold-cranking), ensuring deterministic startup - a feature explicitly documented in Section 5.3 and Figure 7-2 of the TLV1811QDCKRQ1 datasheet and essential for automotive ASIL-B compliance.
Can TLV1811QDCKRQ1 drive a MOSFET gate directly?
Yes, TLV1811QDCKRQ1's push-pull output can source/sink ≥4mA (at 125°C), enabling direct drive of small-signal MOSFET gates (e.g., SiC or GaN drivers with ≤1nF gate charge). Its 420ns propagation delay and rail-to-rail input ensure fast, precise switching - verified in TI's Application Report SBAA351 for TLV1811QDCKRQ1-based gate driver interfaces.
Is TLV1811QDCKRQ1 pin-compatible with older comparators like TLV7211 or LMC7211?
No - TLV1811QDCKRQ1 uses the standard SC-70-5 "North West" pinout (IN−, V−, IN+, OUT, V+), whereas TLV7211/LMC7211 follow different pin assignments. For drop-in replacement, TI specifies TLV1811L-Q1 (SOT-23-5, LMC72x1-type pinout) - TLV1811QDCKRQ1 requires PCB redesign if migrating from legacy devices, as confirmed in Table 4-1 of the TLV1811QDCKRQ1 datasheet.
TLV1811QDCKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2.4V ~ 40V
- :
- 3mV @ 12V
- Voltage - Input Offset (Max):
- 0.15pA (Typ)
- Current - Input Bias (Max):
- 30mA @ 12V
- Current - Output (Typ):
- 10µA
- Current - Quiescent (Max):
- 100dB PSRR
- CMRR, PSRR (Typ):
- 900ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- SC-70-5
TLV1811QDCKRQ1 FAQ
1.How can I place an order for TLV1811QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1811QDCKRQ1 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 TLV1811QDCKRQ1 reliable?
The price and inventory of TLV1811QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1811QDCKRQ1 is usually 5 days.
3.What payment methods are accepted for TLV1811QDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1811QDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1811QDCKRQ1?
TLV1811QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1811QDCKRQ1 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 TLV1811QDCKRQ1?
For technical support, including TLV1811QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1811QDCKRQ1 requirements.
6.How does Aetrix verify that TLV1811QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All TLV1811QDCKRQ1 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 TLV1811QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of TLV1811QDCKRQ1?
All TLV1811QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV1811QDCKRQ1, 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 TLV1811QDCKRQ1 part is unused and in its original packaging.
Return procedure for TLV1811QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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