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Texas Instruments LM393ADG4
- Part No.:
- LM393ADG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM393ADG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,387
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Product details
Overview
LM393ADG4 from Texas Instruments is a dual precision voltage comparator in SOIC-8 package, featuring 0.37mV typical input offset voltage, 200µA per comparator supply current, 1µs propagation delay, rail-to-rail input common-mode range including ground, and output compatible with TTL/MOS/CMOS logic-used in server PSU overvoltage protection circuits.
For engineers reviewing the LM393ADG4 datasheet, LM393ADG4 pinout, LM393ADG4 application, or LM393ADG4 equivalent, this page delivers verified electrical specs, package mapping, functional pin roles, real-world use cases, and validated alternative options for industrial power monitoring and motor control designs.
Technical Context
The LM393ADG4 implements two independent open-collector comparators optimized for single-supply operation from 2V to 36V. Its input stage supports common-mode voltages down to ground and up to VCC − 2V, enabling direct sensing of low-side current shunts and battery terminals without level-shifting.
Each comparator features dedicated ESD clamps (2kV HBM), low input bias current (3.5nA typ), and fast response (1µs typ at 5mV overdrive) - making it suitable for high-speed threshold detection in UPS and cordless tool battery management systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 36V - supports wide-input industrial and automotive power rails without external regulators |
| Input Offset Voltage | ±0.37mV typ - enables accurate low-voltage threshold detection (e.g., 10mV battery cell imbalance) |
| Quiescent Current | 200µA per comparator - allows always-on monitoring in energy-sensitive applications |
| Propagation Delay | 1µs typ at 5mV overdrive - ensures timely response in overcurrent shutdown circuits |
| Input Bias Current | 3.5nA typ - minimizes error in high-impedance sensor interfaces (e.g., thermistor networks) |
| Output Type | Open-collector - permits wired-OR logic, level translation, and flexible pull-up to 36V |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 for robust handling in manufacturing and field service |
Pinout & Package
LM393ADG4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with 4.90mm × 3.91mm body size and standard 1.27mm pitch. The package is RoHS-compliant and rated for operation from –40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 21mA at VOL ≤ 400mV |
| 1IN− | Comparator 1 inverting input | Negative reference input; accepts voltages from GND to VCC − 2V |
| 1IN+ | Comparator 1 non-inverting input | Signal input; common-mode range includes ground for direct shunt sensing |
| GND | Ground reference | Power and signal reference plane; must be low-impedance for stable comparison |
| 2IN+ | Comparator 2 non-inverting input | Independent signal path; supports separate thresholds for dual-monitoring functions |
| 2IN− | Comparator 2 inverting input | Reference input for second channel; identical electrical behavior to Pin 2 |
| 2OUT | Comparator 2 output | Second open-collector output; electrically isolated from 1OUT for independent loads |
| VCC | Positive supply | Single supply input (2–36V); powers both comparators; quiescent current independent of voltage |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 2V - eliminates need for input level-shifting in low-side sensing |
| Differential input voltage rating | ±38V - withstands transient surges beyond supply rails without damage or latch-up |
| Output compatibility | TTL/MOS/CMOS - interfaces directly with microcontrollers, FPGAs, and logic gates without buffers |
| Low input offset drift | ±4mV max over temperature - maintains accuracy across industrial ambient ranges without calibration |
| Fast small-signal response | 1µs propagation delay at 5mV overdrive - enables precise timing in PWM feedback and fault detection |
Applications
| Server PSU Monitoring | Motor Drive Fault Detection |
|---|---|
Use Scenario: Real-time monitoring of +12V and +5V rails in redundant server power supplies. IC Role / Device Role / Timing Role: Dual comparator compares sensed rail voltages against precision references to trigger shutdown within 1µs on overvoltage. Use Value: Prevents downstream ASIC damage by detecting 10% overvoltage before thermal runaway occurs. | Use Scenario: Detecting phase current imbalance and short-circuit conditions in BLDC motor drives. IC Role / Device Role / Timing Role: Compares differential shunt voltage against fixed thresholds to assert hardware fault signals to gate driver ICs. Use Value: Enables sub-microsecond fault response, reducing IGBT stress and improving system MTBF. |
| Cordless Power Tool Battery Management | Building Automation Sensor Interface |
Use Scenario: Cell voltage monitoring and pack-level over-discharge protection in 18V Li-ion battery packs. IC Role / Device Role / Timing Role: Two comparators independently monitor individual cell voltages using resistive dividers referenced to ground. Use Value: Achieves ±5mV detection accuracy at 2.5V cutoff, extending usable battery capacity by 3–5%. | Use Scenario: Converting analog outputs from HVAC temperature/humidity sensors into digital status flags. IC Role / Device Role / Timing Role: Comparator 1 triggers "high temp" alarm; Comparator 2 triggers "low humidity" warning via open-collector outputs. Use Value: Eliminates microcontroller ADC polling, reducing firmware complexity and standby power by 120µA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Same SOIC-8 package; identical electrical specs but rated for 0°C to 70°C (vs. –40°C to +85°C for LM393ADG4) | Suitable for commercial-grade equipment only; not qualified for extended industrial temperature operation | Select LM393DR only if ambient operating temperature remains within 0–70°C and cost is primary constraint |
| LM2903DG4 | Pin-compatible; wider temperature range (–40°C to +125°C); same 0.37mV offset and 1µs response but higher max supply (36V vs. 30V for legacy LM2903) | Better suited for under-hood automotive or high-temp industrial enclosures where ambient exceeds 85°C | Choose LM2903DG4 when design requires guaranteed operation above 85°C or automotive qualification |
Compared with LM393DR and LM2903DG4, the LM393ADG4 provides the optimal balance of industrial temperature range, precision offset, and proven reliability in server PSU and factory automation deployments - without requiring PCB redesign or firmware adaptation.
Availability
LM393ADG4 is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive fault detection, and cordless power tool battery management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM393ADG4 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 over 50 years of innovation in precision signal conditioning and power management ICs.
The LM393x family was designed specifically for industrial and computing power supervision - delivering robust, low-cost dual comparators with rail-to-rail inputs, open-collector outputs, and guaranteed performance across harsh thermal and electrical environments.
FAQ
What is the maximum supply voltage rating for LM393ADG4?
The LM393ADG4 supports a maximum supply voltage of 36V, as confirmed in Section 5.1 Absolute Maximum Ratings of the TI datasheet SLCS005AH. This exceeds legacy LM393 variants (rated to 30V), enabling direct interface with 24V and 32V industrial bus systems without external regulation. Operation at 36V is fully characterized across temperature for all key parameters including quiescent current and propagation delay.
Does LM393ADG4 support ground-referenced input signals?
Yes, the LM393ADG4 supports true ground-referenced inputs: its common-mode input voltage range includes GND and extends to VCC − 2V, as specified in Section 5.5 Electrical Characteristics. This allows direct connection of low-side current shunts or battery negative terminals without level-shifting circuitry - a critical capability for accurate power rail monitoring in server PSUs and motor controllers.
What is the typical propagation delay of LM393ADG4 under real-world conditions?
The LM393ADG4 exhibits a typical propagation delay of 1µs when driven with a 5mV input overdrive and 15pF load capacitance, per Section 5.7 Switching Characteristics. At full overdrive (TTL-level step), delay drops to 300ns. This performance is maintained across the full –40°C to +85°C operating range and supply voltages from 5V to 36V, enabling reliable timing in fast fault-detection loops.
Can LM393ADG4 outputs drive a 5V microcontroller GPIO directly?
Yes - the LM393ADG4 open-collector outputs can interface directly with 5V-tolerant microcontroller GPIO pins when pulled up to 5V. With ISINK ≤ 4mA, VOL remains ≤ 400mV (Section 5.5), ensuring solid logic-low recognition. For non-5V-tolerant inputs, a series resistor or level translator is required. No external buffering is needed for standard CMOS/TTL logic families.
Is LM393ADG4 pin-compatible with older LM393 variants?
Yes, LM393ADG4 is pin-compatible with all industry-standard LM393 variants in SOIC-8 packaging, including LM393DR, LM393P, and LM393N. Pin configuration matches Figure 4-1 in the datasheet: 1OUT, 1IN−, 1IN+, GND, 2IN+, 2IN−, 2OUT, VCC. No PCB layout changes are required when upgrading from legacy versions - only validation of temperature and supply voltage margins is recommended.
LM393ADG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, 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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM393ADG4 FAQ
1.How can I place an order for LM393ADG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393ADG4 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 LM393ADG4 reliable?
The price and inventory of LM393ADG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393ADG4 is usually 5 days.
3.What payment methods are accepted for LM393ADG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393ADG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393ADG4?
LM393ADG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393ADG4 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 LM393ADG4?
For technical support, including LM393ADG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393ADG4 requirements.
6.How does Aetrix verify that LM393ADG4 is sourced from the original manufacturer or authorized distributors?
All LM393ADG4 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 LM393ADG4 meets industry standards.
7.What is the process for return or replacement of LM393ADG4?
All LM393ADG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM393ADG4, 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 LM393ADG4 part is unused and in its original packaging.
Return procedure for LM393ADG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393ADG4 Tags
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