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Texas Instruments LM293ADGKRG4
- Part No.:
- LM293ADGKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM293ADGKRG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,348
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Product details
Overview
LM293ADGKRG4 from Texas Instruments is a dual voltage comparator in VSSOP-8 package, designed for single-supply operation from 2V to 30V. It delivers ±9mV max input offset voltage (over temperature), 1.3µs typical propagation delay, and rail-to-rail input common-mode range including ground - enabling precise threshold detection in power supply monitoring and motor control circuits.
For engineers reviewing the LM293ADGKRG4 datasheet, LM293ADGKRG4 pinout, LM293ADGKRG4 application, or LM293ADGKRG4 equivalent, this page provides verified electrical specifications, validated pin functions, real-world use cases in industrial power systems, and two confirmed alternative parts with documented functional and thermal differences.
Technical Context
The LM293A belongs to the legacy LMx93x family and uses open-collector output architecture compatible with TTL, MOS, and CMOS logic. Its input stage supports differential input voltages up to ±30V and common-mode inputs down to ground, making it suitable for direct sensing of battery or bus voltages without level-shifting.
Unlike B-version comparators (e.g., LM393B), the LM293A does not include enhanced ESD clamps or sub-1µs response; its 1.3µs typical propagation delay and ±9mV offset reflect A-grade performance optimized for cost-sensitive industrial applications rather than high-speed or ultra-precision use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 30V - supports wide-input industrial supplies without external regulation |
| Input Offset Voltage (max) | ±9mV over full temperature range - sets minimum detectable voltage difference between inputs |
| Propagation Delay (typ) | 1.3µs at 5V supply - determines maximum switching frequency in feedback or protection circuits |
| Input Bias Current (max) | –250nA - enables high-impedance sensor interfacing with minimal loading error |
| Output Sink Current (min) | 6mA at VOL = 400mV - ensures reliable drive into 10kΩ pull-up or logic gate inputs |
| Common-Mode Input Range | 0V to (VCC – 2V) - allows direct connection to ground-referenced signals and rail-sensing |
| ESD Rating (HBM) | 2000V - meets standard handling requirements for automated assembly and field deployment |
Pinout & Package
VSSOP-8 (DGK) package: 3.00mm × 3.00mm body, 0.65mm pitch, exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector node requiring external pull-up; sinks current when IN+ < IN− |
| 1IN− | Comparator 1 inverting input | Negative reference input; accepts signals from 0V to VCC − 2V |
| 1IN+ | Comparator 1 non-inverting input | Signal input; same voltage range as 1IN−; used for threshold comparison |
| GND | Ground reference | Return path for supply and signal; thermal pad must be soldered to PCB GND plane |
| 2IN+ | Comparator 2 non-inverting input | Independent signal input; no crosstalk with comparator 1 |
| 2IN− | Comparator 2 inverting input | Independent reference input; supports separate threshold setting |
| 2OUT | Comparator 2 output | Second open-collector output; electrically isolated from 1OUT |
| VCC | Positive supply | Single supply rail (2–30V); powers both comparators; quiescent current independent of VCC |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 2V - eliminates need for input biasing networks |
| Open-collector outputs | Enable wired-OR logic, level translation, and flexible pull-up selection (e.g., 3.3V/5V/12V) |
| Wide supply voltage operation | 2V to 30V - interoperates with Li-ion batteries, 24V industrial rails, and legacy 5V systems |
| Low input bias current | Max –250nA - preserves accuracy with high-value resistor dividers (>1MΩ) in voltage monitors |
| Differential input voltage tolerance | ±30V - withstands transient overvoltage events without latch-up or damage |
Applications
| Power Supply Monitoring | Motor Overcurrent Protection |
|---|---|
|
Use Scenario: Detecting undervoltage lockout (UVLO) and overvoltage shutdown in server PSUs and UPS inverters. IC Role / Device Role / Timing Role: Dual comparator independently monitors input and output rails against precision references. Use Value: ±9mV offset ensures accurate 1% threshold detection; open-collector outputs interface directly with PMIC enable pins. |
Use Scenario: Shutting down H-bridge drivers when current-sense voltage exceeds safe limit during stall conditions. IC Role / Device Role / Timing Role: Comparator 1 compares shunt voltage to fixed threshold; Comparator 2 validates direction signal integrity. Use Value: 1.3µs response enables reaction within 10µs window before IGBT thermal runaway; 30V differential rating tolerates PWM noise spikes. |
| Appliance Safety Interlock | Factory Automation Sensor Interface |
|
Use Scenario: Enabling heating elements only when door switch and temperature sensor confirm safe operating state. IC Role / Device Role / Timing Role: One comparator verifies mechanical switch closure; second validates thermistor-based temperature limit. Use Value: Rail-to-rail inputs accept direct 0–5V sensor outputs; 2000V HBM ESD rating survives repeated user handling in white goods. |
Use Scenario: Converting analog 4–20mA loop signals into digital on/off commands for PLC input modules. IC Role / Device Role / Timing Role: Comparator thresholds set via precision resistors to detect alarm bands (e.g., 15–18mA = warning, >18mA = fault). Use Value: Low input bias current prevents loading errors in high-impedance current-loop receivers; VSSOP-8 footprint saves space on dense I/O cards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393ADR | SOIC-8 package; ±9mV offset; 1.3µs delay; 2–30V supply; same A-grade specs but larger footprint | Preferred where board space permits and hand-soldering or legacy layout reuse is required | Select LM393ADR if VSSOP assembly capability is unavailable or thermal pad routing is impractical |
| LM2903DR | SOIC-8; ±15mV offset (wider); 1.3µs delay; 2–32V supply; extended temp range (–40°C to +125°C) | Better suited for automotive under-hood or outdoor industrial enclosures with wider ambient swings | Choose LM2903DR when operating beyond 85°C or when higher offset tolerance is acceptable for cost reduction |
Compared with LM293ADGKRG4, LM393ADR offers identical electrical performance in a through-hole-compatible SOIC package, while LM2903DR trades tighter offset for broader temperature coverage and higher supply tolerance - both require no schematic change but may need layout adjustment for package size or thermal pad.
Availability
LM293ADGKRG4 is available at Aetrix Electronics and suitable for power supply monitoring, motor protection, appliance safety interlocks, and factory automation sensor interfaces requiring stable component supply across long production lifecycles.
Supply support for LM293ADGKRG4 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 for industrial, automotive, and personal electronics markets.
The LM293A belongs to TI's legacy LMx93x dual comparator product line, engineered for robust, cost-effective voltage comparison in industrial control, power management, and safety-critical sensing applications.
FAQ
What is the maximum supply voltage rating for LM293ADGKRG4?
The LM293ADGKRG4 has an absolute maximum supply voltage of 36V, but its recommended operating range is 2V to 30V. Operating above 30V risks exceeding specified electrical characteristics such as input offset drift and propagation delay stability. The device remains functional at 36V per absolute ratings, though TI specifies performance guarantees only up to 30V in datasheet conditions.
Does LM293ADGKRG4 support rail-to-rail input operation?
Yes, the LM293ADGKRG4 supports rail-to-rail input common-mode voltage from 0V (ground) up to VCC − 2V. This allows direct interfacing with ground-referenced sensors or signals without external biasing. However, inputs must not go below –0.3V or above VCC + 0.3V to avoid excessive input current or incorrect output states.
Can LM293ADGKRG4 replace LM393ADR in existing designs?
Yes, LM293ADGKRG4 is functionally and electrically compatible with LM393ADR - both share identical A-grade specifications (±9mV offset, 1.3µs delay, 2–30V supply). The only differences are package (VSSOP-8 vs. SOIC-8) and thermal pad presence. Pinout matches exactly, but PCB layout must accommodate the smaller VSSOP footprint and thermal pad connection to GND.
What is the output configuration of LM293ADGKRG4?
The LM293ADGKRG4 features two independent open-collector outputs. Each output sinks current when its respective comparator asserts low (IN+ < IN−) and presents high-impedance otherwise. External pull-up resistors are mandatory; values depend on load capacitance and required rise time - typical choices range from 4.7kΩ (for 5V logic) to 10kΩ (for 12V systems).
Is LM293ADGKRG4 suitable for automotive applications?
The LM293ADGKRG4 is rated for operation from –25°C to +85°C, which covers passenger cabin environments but not under-hood locations. For automotive applications requiring –40°C to +125°C, TI recommends LM2903DR or LM2903B - both offer extended temperature range and higher supply tolerance (up to 32V or 36V), while maintaining pin compatibility with LM293ADGKRG4 in SOIC-8.
LM293ADGKRG4 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:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Open-Drain, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 2mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -25°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-VSSOP
LM293ADGKRG4 FAQ
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Please submit a Request for Quotation (RFQ) for LM293ADGKRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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5.How can I obtain technical support or documentation for LM293ADGKRG4?
For technical support, including LM293ADGKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM293ADGKRG4 requirements.
6.How does Aetrix verify that LM293ADGKRG4 is sourced from the original manufacturer or authorized distributors?
All LM293ADGKRG4 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 LM293ADGKRG4 meets industry standards.
7.What is the process for return or replacement of LM293ADGKRG4?
All LM293ADGKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM293ADGKRG4, 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 LM293ADGKRG4 part is unused and in its original packaging.
Return procedure for LM293ADGKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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