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Texas Instruments TLV1812DR
- Part No.:
- TLV1812DR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV1812DR.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:649
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Product details
Overview
TLV1812DR from Texas Instruments is a dual-channel, 40V rail-to-rail input comparator with push-pull output, operating from 2.4V to 40V supply, featuring 5 μA per channel quiescent current, 420 ns typical propagation delay, and Power-On Reset (POR) for deterministic startup in motor drive voltage monitoring circuits.
For engineers reviewing the TLV1812DR datasheet, TLV1812DR pinout, TLV1812DR application, or TLV1812DR equivalent, this page delivers verified electrical parameters, SOIC-8 package mapping, functional safety–capable architecture, and real-world implementation guidance for industrial control and automotive power management designs.
Technical Context
The TLV1812DR implements two independent high-voltage comparators with rail-to-rail inputs spanning (V−) − 0.2 V to (V+) + 0.2 V and internal POR circuitry that holds outputs low for ≤200 μs until supply reaches ≥2.4 V. Its push-pull stage sources/sinks up to 30 mA short-circuit current while maintaining 250 mV VOL/VOH at 4 mA load across −40°C to +125°C.
Unlike open-drain variants (TLV1822), TLV1812DR eliminates external pull-up resistors and supports direct LED/MOSFET gate driving. Input bias current is 150 fA typical, offset voltage is ±0.5 mV at 25°C with ±4 mV max over temperature, and PSRR is 100 dB - enabling precision threshold detection in noisy 24V/40V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.4 V to 40 V - supports direct connection to 24V industrial rails and 40V battery systems without regulation. |
| Quiescent Current | 5 μA per channel - enables always-on monitoring in low-power IoT edge nodes and battery-backed controllers. |
| Propagation Delay | 420 ns typical at 100 mV overdrive - provides fast response for overvoltage/undervoltage fault detection in motor drives. |
| Input Offset Voltage | ±0.5 mV (25°C), ±4 mV (−40°C to +125°C) - ensures accurate 10 mV-level threshold sensing in precision reference circuits. |
| Output Type | Push-pull - drives capacitive loads (e.g., MOSFET gates) directly; no external pull-up required; supports bidirectional current flow. |
| Power-On Reset | Holds OUT1/OUT2 low ≤200 μs until V+ ≥2.4 V - prevents false triggering during system power-up/power-down sequences. |
| ESD Rating | ±2000 V HBM - meets IEC 61000-4-2 Level 2 for robustness in factory automation environments. |
Pinout & Package
TLV1812DR is supplied in an 8-pin SOIC (D) package measuring 3.91 mm × 4.90 mm, with exposed thermal pad connected directly to V− for enhanced thermal performance in continuous-duty applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Push-pull output of comparator 1 - sinks/sourses current; must not be wired to another output or supply rail. |
| 2 | IN1− | Inverting input of comparator 1 - accepts signals from (V−) − 0.2 V to (V+) + 0.2 V; requires ≥50 mV differential if unused. |
| 3 | IN1+ | Non-inverting input of comparator 1 - rail-to-rail capable; ESD clamped to V− and weakly to V+ via 5 kΩ resistor. |
| 4 | V− | Negative supply - connects to system ground or negative rail; thermal pad must be soldered to this node. |
| 5 | IN2+ | Non-inverting input of comparator 2 - electrically identical to IN1+; supports independent dual-threshold detection. |
| 6 | IN2− | Inverting input of comparator 2 - used for differential sensing or single-ended reference comparison. |
| 7 | OUT2 | Push-pull output of comparator 2 - fully independent of OUT1; shares same V+ and V− supply connections. |
| 8 | V+ | Positive supply - accepts 2.4 V to 40 V; powers both comparators and internal POR logic. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Operates with inputs from (V−) − 0.2 V to (V+) + 0.2 V - enables direct sensing of signals near supply rails without attenuation networks. |
| Low input bias current | 150 fA typical - minimizes error in high-impedance divider-based voltage monitoring (e.g., battery cell balancing). |
| 40V absolute maximum rating | Withstands transient surges up to 42 V on supply and inputs - suitable for 24V/36V automotive and industrial bus interfaces. |
| Functional safety capability | Documentation available for ISO 26262 ASIL-B system integration - supports diagnostic coverage analysis in safety-critical motor control units. |
| Thermal pad connection | Exposed die pad tied to V− - reduces θJA to 136.1°C/W in SOIC package, enabling 100% duty-cycle operation at 85°C ambient. |
Applications
| Overvoltage Protection Circuit | Motor Phase Current Monitoring |
|---|---|
|
Use Scenario: Detecting DC bus voltage exceeding 32 V in a 24V industrial servo drive to trigger shutdown before IGBT damage. IC Role / Device Role / Timing Role: TLV1812DR compares sensed bus voltage against a precision 32.0V reference using IN1+ and IN1−; OUT1 asserts low within 420 ns to disable gate driver. Use Value: Eliminates need for external level-shifting or op-amp buffers due to 40V input common-mode range and rail-to-rail operation. |
Use Scenario: Monitoring back-EMF zero-crossing in BLDC motor commutation to synchronize switching timing. IC Role / Device Role / Timing Role: TLV1812DR's dual comparators (OUT1/OUT2) detect rising/falling edges of phase voltages relative to midpoint reference, generating commutation signals. Use Value: 420 ns propagation delay and <1.2 µV/°C offset drift ensure consistent timing accuracy across −40°C to +125°C motor temperature range. |
| Factory Automation Sensor Interface | Automotive Battery Management |
|
Use Scenario: Converting 4–20 mA loop current into digital ON/OFF signal for PLC input modules in harsh EMI environments. IC Role / Device Role / Timing Role: TLV1812DR uses IN2+ as reference input tied to 1.00 V, IN2− connected to shunt-resistor voltage drop; OUT2 drives optocoupler LED directly. Use Value: Push-pull output sources 4 mA at 250 mV VOL - sufficient to drive standard optocouplers without external transistor stage. |
Use Scenario: Monitoring individual Li-ion cell voltage against overcharge threshold (4.25 V) in 12S BMS with isolated communication. IC Role / Device Role / Timing Role: TLV1812DR operates from local 3.3V LDO; IN1+ receives scaled cell voltage; POR ensures clean startup after wake-from-sleep events. Use Value: 5 μA per channel quiescent current extends battery life in always-monitoring mode; 2.4V minimum supply allows operation down to depleted LDO output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1822DR | Open-drain output; supports 40V pull-up independent of V+; no sourcing capability. | Required where wired-OR logic or level translation to higher voltage domains (e.g., 24V logic) is needed. | Select TLV1822DR only when external pull-up is acceptable and bidirectional drive is unnecessary. |
| LM393DR | Lower supply range (2V–36V); no POR; 1.3 mV offset; 1.3 μA IQ; open-collector output. | Suitable for cost-sensitive, non-safety-critical 5V/12V systems where startup reliability is secondary. | Choose LM393DR only for legacy designs lacking functional safety requirements and where 420 ns speed is not critical. |
Compared with TLV1822DR, TLV1812DR eliminates pull-up resistors and enables direct load driving; compared with LM393DR, it adds POR, tighter offset, lower IQ, and 40V tolerance - making TLV1812DR optimal for new industrial and automotive designs demanding reliability and precision.
Availability
TLV1812DR is available at Aetrix Electronics and suitable for motor drives, factory automation systems, and automotive battery management requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TLV1812DR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog ICs and industrial-grade components.
The TLV181x family was designed specifically for high-voltage, ultra-low-power comparator applications in motor control, power supply supervision, and functional safety–enabled systems - emphasizing robustness, accuracy, and deterministic behavior across wide temperature and supply ranges.
FAQ
What is the maximum supply voltage the TLV1812DR can withstand?
The TLV1812DR has an absolute maximum supply voltage rating of 42 V between V+ and V−. It operates continuously across 2.4 V to 40 V, making it suitable for 24V and 36V industrial rails. Exceeding 42 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does the TLV1812DR require external pull-up resistors on its outputs?
No. The TLV1812DR features a push-pull output stage that actively sources and sinks current, eliminating the need for external pull-up resistors. This simplifies PCB layout and reduces power loss - unlike open-drain comparators such as TLV1822DR which require external pull-ups.
How does the Power-On Reset (POR) function behave on the TLV1812DR?
The TLV1812DR's POR holds both OUT1 and OUT2 low for ≤200 μs after V+ crosses 2.4 V during power-up, and reactivates if V+ drops below 2.4 V. This prevents false triggers in voltage-monitoring circuits during brown-out or cold-start conditions - a key differentiator versus comparators without integrated POR.
Can the TLV1812DR interface directly with a 3.3V microcontroller GPIO?
Yes. When powered from a 3.3V supply, TLV1812DR's push-pull outputs swing rail-to-rail (0 V to 3.3V), matching standard CMOS logic thresholds. Its 150 fA input bias current avoids loading high-impedance MCU reference pins, and 5 μA supply current minimizes impact on system power budget.
Is the TLV1812DR qualified for automotive applications?
The TLV1812DR is not AEC-Q200 qualified, but it operates across −40°C to +125°C and supports functional safety documentation per ISO 26262. It is widely deployed in automotive battery monitors and body control modules where full qualification is not mandated, though designers must perform their own FMEDA and validation.
TLV1812DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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):
- 0.15pA @ 12V
- Current - Input Bias (Max):
- 30mA
- Current - Output (Typ):
- 7.5µA
- Current - Quiescent (Max):
- 100dB PSRR
- CMRR, PSRR (Typ):
- 450ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TLV1812DR FAQ
1.How can I place an order for TLV1812DR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1812DR 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 TLV1812DR reliable?
The price and inventory of TLV1812DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1812DR is usually 5 days.
3.What payment methods are accepted for TLV1812DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1812DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1812DR?
TLV1812DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1812DR 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 TLV1812DR?
For technical support, including TLV1812DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1812DR requirements.
6.How does Aetrix verify that TLV1812DR is sourced from the original manufacturer or authorized distributors?
All TLV1812DR 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 TLV1812DR meets industry standards.
7.What is the process for return or replacement of TLV1812DR?
All TLV1812DR units undergo pre-shipment inspection (PSI). If there is an issue with TLV1812DR, 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 TLV1812DR part is unused and in its original packaging.
Return procedure for TLV1812DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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