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Texas Instruments TLV1812QDDFRQ1
- Part No.:
- TLV1812QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TLV1812QDDFRQ1.pdf
- Description:
- AUTOMOTIVE, DUAL MICROPOWER HIGH
- Quantity:
- Payment:
- Shipping:
Inventory:2,986
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Product details
Overview
TLV1812QDDFRQ1 from Texas Instruments is an automotive-grade dual-channel rail-to-rail input comparator with push-pull output, qualified to AEC-Q100 Grade 1 (–40°C to +125°C), 2.4V–40V supply range, 5μA per channel quiescent current, and 420ns typical propagation delay. It integrates Power-On Reset (POR) for deterministic startup and is used in HEV/EV powertrain voltage monitoring and body control module window lift detection.
For engineers reviewing the TLV1812QDDFRQ1 datasheet, TLV1812QDDFRQ1 pinout, TLV1812QDDFRQ1 application, or TLV1812QDDFRQ1 equivalent, key selection considerations include its 40V absolute maximum supply rating, rail-to-rail input stage enabling direct battery-sensed signal comparison, push-pull output eliminating external pull-up resistors, and POR functionality preventing false triggering during cold-crank conditions.
Technical Context
The TLV1812QDDFRQ1 implements a dual independent comparator core with separate IN1±/IN2± inputs and OUT1/OUT2 outputs, each featuring internal biasing and rail-to-rail input stages extending from (V−) − 0.2 V to (V+) + 0.2 V. Its push-pull output stage sources/sinks up to 30 mA short-circuit current and delivers 250 mV VOL at 4 mA sink load across full temperature range.
Power-On Reset asserts a known output state until V+ reaches ≥1.7 V, preventing metastability during system boot. The device uses TI's proprietary ESD protection architecture: bidirectional diode clamps on all I/O pins referenced to V+ and V−, with input overvoltage tolerance limited to ±0.2 V beyond rails under normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.4 V to 40 V - supports direct connection to 12 V/24 V/42 V automotive battery rails without regulation. |
| Quiescent Current | 7.5 μA per channel at 25°C - enables always-on monitoring in low-power body electronics modules. |
| Propagation Delay | 420 ns at 100 mV overdrive, CL = 50 pF - provides fast response for battery cell voltage fault detection. |
| Input Offset Voltage | ±0.5 mV typical, ±4 mV max over –40°C to +125°C - ensures accurate threshold detection in precision voltage supervisors. |
| Rail-to-Rail Input Range | (V−) − 0.2 V to (V+) + 0.2 V - allows direct sensing of signals near ground or supply rails, e.g., battery undervoltage at 0 V reference. |
| Output Type | Push-pull - drives LEDs directly and interfaces with CMOS logic without external pull-up, reducing BOM count. |
| Power-On Reset Threshold | 1.7 V - guarantees stable output assertion before microcontroller initialization completes during cold-crank. |
Pinout & Package
TLV1812QDDFRQ1 is packaged in an 8-pin DDF (SOT-23-8) package measuring 1.60 mm × 2.90 mm, with exposed thermal pad connected directly to V− for enhanced thermal performance in high-ambient automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Comparator 1 output | Push-pull driver capable of sourcing/sinking ≥4 mA; connects directly to MCU interrupt pin or LED anode. |
| IN1− | Comparator 1 inverting input | High-impedance node (150 fA bias current); accepts signals down to (V−) − 0.2 V for ground-referenced sensing. |
| IN1+ | Comparator 1 non-inverting input | Matches IN1− characteristics; used with resistor divider for precise voltage threshold setting. |
| V− | Negative supply | Reference for all inputs/outputs; thermal pad must be soldered to PCB ground plane for thermal reliability. |
| IN2+ | Comparator 2 non-inverting input | Independent channel input; enables dual-threshold detection (e.g., overvoltage + undervoltage). |
| IN2− | Comparator 2 inverting input | Paired with IN2+; supports differential sensing or independent single-ended monitoring. |
| OUT2 | Comparator 2 output | Electrically isolated from OUT1; drives separate load (e.g., relay driver or second MCU pin). |
| V+ | Positive supply | Accepts up to 40 V; internal POR circuit monitors this pin to enable safe startup sequencing. |
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 body electronics requirements. |
| 40 V absolute maximum supply rating | Withstands load-dump transients up to 42 V without damage, eliminating need for external TVS protection in many applications. |
| Power-On Reset (POR) | Guarantees OUT1/OUT2 remain in defined state until V+ ≥ 1.7 V, preventing spurious wake-up during battery reconnection. |
| Rail-to-rail input stage | Enables direct interface with 0 V–12 V battery-sensed signals without level-shifting, reducing component count and error sources. |
| 5 μA per channel quiescent current | Supports >10-year battery life in always-on vehicle access systems (e.g., keyless entry sensor nodes). |
| Push-pull output architecture | Drives capacitive loads (e.g., MOSFET gates) and resistive loads (e.g., indicator LEDs) without external pull-up resistors. |
Applications
| HEV/EV Battery Supervision | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Monitoring individual Li-ion cell voltages in 400 V traction battery packs using resistive dividers. IC Role / Device Role / Timing Role: Dual comparator performs simultaneous overvoltage (IN1+/IN1−) and undervoltage (IN2+/IN2−) detection with <420 ns response. Use Value: Enables real-time cell balancing decisions within battery management system (BMS) safety chain, meeting ISO 26262 ASIL-B timing constraints. |
Use Scenario: Detecting window position via motor current sensing in power window lift systems. IC Role / Device Role / Timing Role: TLV1812QDDFRQ1 compares amplified motor current against rising/falling thresholds to identify stall and limit positions. Use Value: Eliminates need for Hall-effect sensors or encoders, reducing cost and improving reliability in harsh door cavity environments. |
| Infotainment Display Backlight Control | Automotive HVAC Blower Motor Protection |
|
Use Scenario: Adaptive backlight dimming based on ambient light sensor output and ignition status. IC Role / Device Role / Timing Role: One channel detects ambient light level crossing threshold; second channel validates ignition ON signal before enabling PWM driver. Use Value: Ensures display remains off during engine cranking (low battery voltage), preventing visual distraction during critical startup phase. |
Use Scenario: Overcurrent protection for HVAC blower motor using shunt resistor feedback. IC Role / Device Role / Timing Role: TLV1812QDDFRQ1 compares shunt voltage against fixed thresholds to trigger shutdown before thermal fuse activation. Use Value: Provides faster, more repeatable trip response than thermal fuses alone, protecting motor driver ICs from destructive current surges. |
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 |
|---|---|---|---|
| TLV1822QDRQ1 | Open-drain output instead of push-pull; supports 40 V pull-up independent of V+ supply. | Required where wired-OR bus signaling or level translation to higher-voltage domains (e.g., 24 V CAN transceiver enable) is needed. | Select TLV1822QDRQ1 when interfacing with legacy 5 V logic or driving multiple loads sharing one pull-up; TLV1812QDDFRQ1 is preferred for direct CMOS/MCU interfacing. |
| LM393QPWRQ1 | Higher quiescent current (200 μA vs. 7.5 μA), no POR, wider offset (±2 mV), 36 V max supply. | Suitable for cost-sensitive, non-safety-critical applications where ultra-low power and deterministic startup are not required. | Choose LM393QPWRQ1 only for legacy designs or secondary monitoring paths where power budget allows; TLV1812QDDFRQ1 delivers superior accuracy, speed, and functional safety support. |
Compared with TLV1822QDRQ1 and LM393QPWRQ1, TLV1812QDDFRQ1 uniquely combines ultra-low power (7.5 μA), integrated POR, 40 V robustness, and push-pull drive in a space-constrained SOT-23-8 package-making it optimal for ASIL-B–compliant voltage supervision in modern automotive ECUs.
Availability
TLV1812QDDFRQ1 is available at Aetrix Electronics and suitable for HEV/EV battery management, body control modules, and infotainment systems requiring stable component supply across extended automotive product lifecycles.
Supply support for TLV1812QDDFRQ1 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 deep expertise in automotive-grade IC design and AEC-Q100 qualification.
The TLV181x-Q1 product line was engineered specifically for automotive voltage monitoring and fault detection applications, emphasizing ultra-low power, wide supply range, and functional safety readiness in harsh operating environments.
FAQ
What is the maximum supply voltage rating for TLV1812QDDFRQ1?
The TLV1812QDDFRQ1 has an absolute maximum supply voltage (V+ to V−) of 42 V, with recommended operating range from 2.4 V to 40 V. This enables direct connection to 12 V and 24 V automotive battery rails and withstands common load-dump transients without external protection components.
Does TLV1812QDDFRQ1 include Power-On Reset functionality?
Yes, TLV1812QDDFRQ1 integrates an internal Power-On Reset (POR) circuit that holds both outputs in a known state until the supply voltage V+ reaches ≥1.7 V. This prevents false triggering during cold-crank or battery reconnection events, ensuring deterministic behavior in automotive power-up sequences.
Can TLV1812QDDFRQ1 operate with a single 3.3 V supply?
Yes, TLV1812QDDFRQ1 operates from 2.4 V to 40 V, making it fully compatible with 3.3 V systems. At 3.3 V, it maintains rail-to-rail input capability (–0.2 V to +3.5 V), 420 ns propagation delay, and 7.5 μA quiescent current-ideal for low-voltage domain monitoring in modern automotive domain controllers.
What is the purpose of the exposed thermal pad on TLV1812QDDFRQ1?
The exposed thermal pad on TLV1812QDDFRQ1 must be soldered directly to the V− (ground) plane on the PCB. It reduces junction-to-board thermal resistance to 88.1 °C/W, improving power dissipation capability and long-term reliability in high-ambient-temperature locations such as engine compartments or under-hood ECUs.
How does the push-pull output of TLV1812QDDFRQ1 differ from open-drain comparators?
The push-pull output of TLV1812QDDFRQ1 actively drives both high and low states-sourcing up to 30 mA and sinking up to 30 mA-eliminating the need for external pull-up resistors. This reduces power loss, improves rise/fall times (<15 ns), and simplifies interface with CMOS inputs, unlike open-drain variants that require external pull-ups and cannot source current.
TLV1812QDDFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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):
- 0.15pA @ 12V
- Current - Input Bias (Max):
- 30mA @ 12V
- Current - Output (Typ):
- 6.5µA, 9µA
- 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
- :
- TSOT-23-8
TLV1812QDDFRQ1 FAQ
1.How can I place an order for TLV1812QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1812QDDFRQ1 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 TLV1812QDDFRQ1 reliable?
The price and inventory of TLV1812QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1812QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for TLV1812QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1812QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1812QDDFRQ1?
TLV1812QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1812QDDFRQ1 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 TLV1812QDDFRQ1?
For technical support, including TLV1812QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1812QDDFRQ1 requirements.
6.How does Aetrix verify that TLV1812QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All TLV1812QDDFRQ1 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 TLV1812QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of TLV1812QDDFRQ1?
All TLV1812QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV1812QDDFRQ1, 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 TLV1812QDDFRQ1 part is unused and in its original packaging.
Return procedure for TLV1812QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV1812QDDFRQ1 Tags
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LM2903DR
Texas Instruments
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LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
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LM393DT
STMicroelectronics
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LM2901PWR
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LM2903DT
STMicroelectronics
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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