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Texas Instruments LM239AQDRQ1
- Part No.:
- LM239AQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM239AQDRQ1.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:406
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Product details
Overview
LM239AQDRQ1 from Texas Instruments is a quad differential comparator qualified for automotive applications, operating from 2 V to 36 V single or dual supplies, with 2 mV typical input offset voltage, 25 nA typical input bias current, and open-collector TTL/MOS/CMOS-compatible outputs-used in battery monitoring, engine control voltage threshold detection, and ABS sensor signal conditioning.
For engineers reviewing the LM239AQDRQ1 datasheet, LM239AQDRQ1 pinout, LM239AQDRQ1 application, or LM239AQDRQ1 equivalent, key selection criteria include automotive-grade temperature range (−40°C to +125°C), ESD robustness (>2000 V CDM), low supply current (0.8 mA typ), and differential input voltage tolerance up to ±36 V.
Technical Context
The LM239AQDRQ1 integrates four independent comparators with internal 80-µA current regulators per channel, enabling stable operation across wide supply ranges without external biasing. Its input stage supports common-mode voltages down to ground and differential inputs up to ±36 V, making it suitable for high-side sensing and rail-to-rail signal comparison in noisy automotive environments.
Each comparator features an open-collector output capable of sinking up to 16 mA, compatible with wired-AND logic configurations and direct interfacing to TTL, MOS, and CMOS loads. The device's low input offset current (5 nA typ) and low input bias current minimize errors in high-impedance sensor interfaces such as thermistor or potentiometer-based feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V single or dual supply - supports direct connection to 12 V/24 V automotive batteries without regulation. |
| Input Offset Voltage | 2 mV typical - enables accurate threshold detection at sub-100 mV levels in precision voltage monitoring circuits. |
| Input Bias Current | 25 nA typical - allows use with high-impedance sources (e.g., >1 MΩ sensor dividers) without significant error. |
| Response Time | 0.3 µs typical (TTL-level step, CL = 15 pF) - suitable for fast edge detection in ignition timing or PWM fault sensing. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood engine control module deployment. |
| ESD Rating | 2000 V charged-device model - meets automotive system-level ESD immunity requirements without external protection. |
| Output Sink Current | 16 mA maximum - drives LEDs, relays, or logic inputs directly without external buffer transistors. |
Pinout & Package
LM239AQDRQ1 is housed in a 14-pin SOIC (D package), 3.90 mm body width, 1.75 mm max height, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating. Pin 1 located at top-left corner with notch or beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Comparator Inputs (IN+, IN−) | Eight dedicated analog inputs for four independent differential comparisons; common-mode range includes ground. |
| 3, 6, 10, 13 | Open-collector Outputs | Four active-low outputs; require external pull-up to define logic high level and interface voltage domain. |
| 7 | GND | Analog ground reference for all comparators and internal bias circuitry. |
| 14 | VCC | Positive supply rail; powers all four comparators and output stages. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 compliant - validated for continuous operation in engine control units and transmission modules. |
| Wide supply range | Operates from 2 V to 36 V - eliminates need for separate LDOs in 12 V/24 V vehicle architectures. |
| Low input offset drift | 5.5 mV max over full temperature range - ensures stable trip points across thermal cycling in cabin or powertrain systems. |
| Wired-AND capability | Open-collector outputs support shared bus logic - simplifies fault aggregation across multiple sensors in ADAS subsystems. |
| High differential input voltage | ±36 V rating - enables direct comparison of signals referenced to different potentials (e.g., battery vs. chassis ground). |
Applications
| Battery Voltage Monitoring | Engine Control Unit (ECU) Threshold Detection |
|---|---|
Use Scenario: Real-time monitoring of 12 V lead-acid or 48 V mild-hybrid battery voltage during cranking and charging cycles. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous low-voltage cutoff, overvoltage alarm, charge-complete flag, and alternator field control enable. Use Value: Enables precise, temperature-stable thresholds without calibration; 0.8 mA supply current minimizes parasitic drain during sleep mode. | Use Scenario: Detecting camshaft/crankshaft position sensor zero-crossings and validating throttle position voltage windows in gasoline direct injection systems. IC Role / Device Role / Timing Role: Four-channel window comparator validates analog sensor outputs against dynamic upper/lower bounds defined by microcontroller DACs. Use Value: 0.3 µs response time ensures accurate timing capture at 10 kHz crankshaft speeds; −40°C to +125°C operation guarantees reliability under hood. |
| Anti-lock Braking System (ABS) Sensor Signal Conditioning | Power Distribution Unit (PDU) Fault Aggregation |
Use Scenario: Converting variable-reluctance wheel speed sensor AC waveforms into clean digital pulses for ABS controller input. IC Role / Device Role / Timing Role: One comparator channel acts as zero-crossing detector with hysteresis; remaining channels monitor supply integrity and sensor bias faults. Use Value: Input common-mode range including ground allows direct connection to floating sensor coils; 25 nA input bias avoids loading high-Z sensor circuits. | Use Scenario: Consolidating overcurrent, overtemperature, and short-circuit alerts from multiple solid-state switches into a single fault interrupt line for vehicle central gateway. IC Role / Device Role / Timing Role: Wired-AND configuration of four open-collector outputs creates OR-fault bus that pulls low on any detected anomaly. Use Value: Eliminates need for discrete diodes or logic gates; 16 mA sink capability drives long PCB traces or optocouplers directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM239QDRQ1 | Higher input offset voltage (3 mV typ vs. 2 mV), otherwise identical pinout, specs, and qualification. | Suitable for non-critical automotive functions where tighter threshold accuracy is not required. | Select LM239AQDRQ1 when <2.5 mV offset is mandatory for sensor linearity or low-voltage detection. |
| TLV1704QDRQ1 | Rail-to-rail input, lower supply current (125 µA/ch), but only 5.5 V max supply and no ±36 V differential input rating. | Limited to low-voltage domains (e.g., infotainment, body control); not suitable for direct battery sensing. | Choose TLV1704QDRQ1 only for 3.3 V/5 V systems requiring ultra-low power and RRI performance. |
Compared with LM239QDRQ1, LM239AQDRQ1 delivers tighter offset for precision thresholding; compared with TLV1704QDRQ1, it supports full automotive battery voltage range and high-differential-swing sensor interfaces at higher quiescent current.
Availability
LM239AQDRQ1 is available at Aetrix Electronics and suitable for battery management systems, engine control modules, anti-lock braking systems, and power distribution units requiring stable component supply across extended temperature and automotive lifecycle demands.
Supply support for LM239AQDRQ1 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM239A-Q1 belongs to TI's automotive-qualified comparator product line, designed specifically for reliable voltage comparison in harsh-temperature, high-EMI environments such as powertrain and chassis control systems.
FAQ
What is the operating temperature range of the LM239AQDRQ1?
The LM239AQDRQ1 is rated for continuous operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for automotive under-hood applications. This range is validated across all electrical parameters in the datasheet, including input offset voltage, response time, and output saturation voltage, ensuring consistent performance in engine control units and transmission control modules.
Does the LM239AQDRQ1 support dual-supply operation?
Yes, the LM239AQDRQ1 supports dual-supply operation provided the difference between the two supplies is 2 V to 36 V and the positive supply (VCC) is at least 1.5 V more positive than the input common-mode voltage. This flexibility allows use in mixed-signal systems where analog sections operate from split rails while digital logic uses single-ended supplies.
What is the maximum differential input voltage the LM239AQDRQ1 can withstand?
The LM239AQDRQ1 supports a differential input voltage of ±36 V, meaning the voltage at IN+ may exceed IN− by up to 36 V or fall below it by up to 36 V without damage or phase reversal. This rating is specified in the Absolute Maximum Ratings table and enables direct interfacing with unconditioned sensor outputs in high-voltage automotive subsystems.
Can the LM239AQDRQ1 outputs drive a 5 V logic input directly?
No-the LM239AQDRQ1 has open-collector outputs and cannot source current. To interface with a 5 V logic input, an external pull-up resistor to 5 V must be used. The output will sink current when active low, pulling the node to ≤400 mV (typical) at 4 mA load, satisfying TTL and CMOS low-level input requirements.
Is the LM239AQDRQ1 pin-compatible with standard LM239 variants?
Yes, the LM239AQDRQ1 uses the same SOIC-14 (D) package and identical pinout as industrial-grade LM239 and LM239A devices, including LM239DR, LM239ADR, and LM239QDRQ1. However, its automotive qualification, tighter offset spec, and enhanced ESD ratings make it the preferred choice for safety-critical vehicle systems.
LM239AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 2.5mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM239AQDRQ1 FAQ
1.How can I place an order for LM239AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239AQDRQ1 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 LM239AQDRQ1 reliable?
The price and inventory of LM239AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239AQDRQ1 is usually 5 days.
3.What payment methods are accepted for LM239AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239AQDRQ1?
LM239AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239AQDRQ1 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 LM239AQDRQ1?
For technical support, including LM239AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239AQDRQ1 requirements.
6.How does Aetrix verify that LM239AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All LM239AQDRQ1 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 LM239AQDRQ1 meets industry standards.
7.What is the process for return or replacement of LM239AQDRQ1?
All LM239AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM239AQDRQ1, 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 LM239AQDRQ1 part is unused and in its original packaging.
Return procedure for LM239AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239AQDRQ1 Tags
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