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Texas Instruments LM393ADGKRG4
- Part No.:
- LM393ADGKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM393ADGKRG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
LM393ADGKRG4 from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±4 mV max input offset voltage, 1.3 µs typical response time, 25 mA output sink capability, rail-to-rail input common-mode range including ground, and TTL/CMOS/MOS-compatible open-collector outputs - widely deployed in server PSU overvoltage protection circuits.
For engineers reviewing the LM393ADGKRG4 datasheet, LM393ADGKRG4 pinout, LM393ADGKRG4 application, or LM393ADGKRG4 equivalent, this page delivers verified electrical specs, package-validated pin functions, real-world use cases in industrial power systems, and two confirmed alternative comparators with documented functional and thermal differences.
Technical Context
The LM393ADGKRG4 implements two independent, internally compensated comparators with open-collector outputs. Its input stage supports common-mode voltages down to ground and up to VCC – 2 V, enabling direct sensing of low-side current shunts and battery terminals without level-shifting.
Propagation delay is specified at 1.3 µs under 100 mV input overdrive with 5.1 kΩ pull-up and 15 pF load; quiescent supply current remains stable at 0.8–1.0 mA across 5 V to 30 V operation, independent of supply voltage per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - supports wide-input industrial and telecom power rails without external regulation |
| Input Offset Voltage (max) | ±4 mV - enables accurate threshold detection within ±10 mV windows at room temperature |
| Response Time (typ) | 1.3 µs - sufficient for fast overvoltage lockout in 500 kHz switching PSUs |
| Output Sink Current | 25 mA - drives standard LED indicators or MOSFET gate resistors directly |
| Input Bias Current (max) | 250 nA - minimizes error in high-impedance sensor interfaces (e.g., thermistor dividers) |
| Common-Mode Input Range | 0 V to (VCC – 2 V) - allows direct connection to ground-referenced signals and VCC-sensed rails |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for board-level handling robustness |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector drain - requires external pull-up to define logic HIGH level |
| 1IN− | Comparator 1 inverting input | Differential sensing node - referenced to 1IN+ for threshold comparison |
| 1IN+ | Comparator 1 non-inverting input | Reference or signal input - accepts voltages from GND to VCC − 2 V |
| GND | Ground reference | Return path for supply and inputs; thermal pad must be soldered to PCB GND plane |
| 2IN+ | Comparator 2 non-inverting input | Independent threshold input - electrically isolated from comparator 1 |
| 2IN− | Comparator 2 inverting input | Second differential pair input - supports separate voltage monitoring channel |
| 2OUT | Comparator 2 output | Open-collector output - shares no internal connection with 1OUT |
| VCC | Positive supply | Single supply rail - powers both comparators; no negative supply required |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Enables direct interface with ground-sensed current monitors and battery terminals without level shifters |
| Open-collector outputs | Supports wired-OR logic, mixed-voltage interfacing (e.g., 3.3 V logic driving 12 V load), and flexible pull-up selection |
| Low input bias current (250 nA max) | Preserves accuracy in high-impedance divider networks used for precision voltage monitoring |
| Stable quiescent current vs. supply | Ensures predictable power budgeting across 2 V–30 V input range - critical for wide-input DC/DC supervision |
| 2 kV HBM ESD rating | Reduces need for external protection diodes in automated assembly and field-deployed equipment |
Applications
| Server Power Supply Monitoring | Industrial Motor Drive Fault Detection |
|---|---|
Use Scenario: Real-time monitoring of +12 V and +5 V rails in redundant server PSUs to trigger shutdown on overvoltage events. IC Role / Device Role / Timing Role: Dual comparator performing independent voltage window comparison with <1.5 µs latency. Use Value: Prevents downstream ASIC damage by asserting fault latch within 2 µs of excursion beyond ±5% tolerance. | Use Scenario: Detecting phase loss or overcurrent via shunt voltage comparison in 3-phase BLDC motor inverters. IC Role / Device Role / Timing Role: Comparing amplified shunt signals against fixed thresholds to generate immediate hardware trip signals. Use Value: Enables sub-10 µs fault response - faster than microcontroller-based protection loops - safeguarding IGBTs. |
| Building Automation Sensor Interface | Cordless Power Tool Battery Management |
Use Scenario: Converting analog temperature/humidity sensor outputs into digital status flags for HVAC controller inputs. IC Role / Device Role / Timing Role: Threshold detector converting linear sensor voltage into clean logic-level signals. Use Value: Eliminates ADC resource usage and firmware polling; reduces BOM cost versus integrated MCU solutions. | Use Scenario: Cell voltage balancing enable/disable control and pack overvoltage cutoff in 18 V Li-ion tool batteries. IC Role / Device Role / Timing Role: Dual comparator supervising individual cell voltages and total pack voltage simultaneously. Use Value: Provides hardware-level safety cutoff independent of fuel gauge IC - meets UL 2580 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | SOIC-8 package (4.90 × 3.91 mm); 1.3 µs response; ±9 mV max offset; 1 mA supply current | Higher board space requirement; lower precision; suitable for cost-sensitive consumer designs | Select when footprint flexibility and lower unit cost outweigh precision and thermal performance needs |
| LM2903PWR | TSSOP-8 package (3.00 × 4.40 mm); same 1.3 µs response; ±7 mV max offset; rated for –40°C to +125°C | Wider temperature range; identical pinout; higher thermal resistance (200.6°C/W vs. 193.7°C/W) | Select for automotive under-hood or industrial ambient >85°C where extended temp grade is mandatory |
Compared with LM393DR and LM2903PWR, the LM393ADGKRG4 offers superior offset voltage (±4 mV vs. ±9/±7 mV) and lower thermal resistance in VSSOP packaging, making it optimal for space-constrained, precision power supervision in commercial-grade industrial equipment.
Availability
LM393ADGKRG4 is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive fault detection, and building automation sensor interface requiring stable component supply and consistent parametric performance across production batches.
Supply support for LM393ADGKRG4 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The LM393x family was engineered as industry-standard dual comparators for reliable, low-cost voltage supervision - optimized for single-supply operation, wide temperature stability, and interoperability across legacy and new designs.
FAQ
What is the maximum supply voltage rating for LM393ADGKRG4?
The LM393ADGKRG4 has an absolute maximum supply voltage of 36 V, but its recommended operating range is 2 V to 30 V per the datasheet's Recommended Operating Conditions table. Operation above 30 V risks exceeding thermal limits and degrading long-term reliability, even if within absolute ratings. Always verify layout thermal relief and derate for ambient temperature per RθJA = 193.7°C/W.
Does LM393ADGKRG4 support rail-to-rail input operation?
Yes, the LM393ADGKRG4 supports a common-mode input voltage range from ground (0 V) up to VCC – 2 V, enabling true rail-to-rail sensing on the lower end and near-rail operation on the upper end. Neither input may go below –0.3 V or above VCC + 0.3 V without risking incorrect output states or excessive input current - design must include clamping if transient overvoltage is possible.
Can LM393ADGKRG4 drive a 5 V logic input directly?
No - LM393ADGKRG4 features 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 connected to each output (e.g., 10 kΩ). The output will sink current when active low, pulling the logic node to ~0.4 V (max) at 4 mA sink, satisfying TTL and CMOS LOW-level input requirements.
What is the thermal pad connection requirement for LM393ADGKRG4?
The exposed thermal pad on the bottom of the LM393ADGKRG4 VSSOP-8 package must be soldered directly to a PCB copper area tied to the GND net. This connection is mandatory for thermal performance - omitting it increases junction-to-board thermal resistance by >100°C/W and risks thermal shutdown or accelerated parametric drift during sustained 25 mA output sinking.
How does LM393ADGKRG4 differ from LM393B variants?
The LM393ADGKRG4 belongs to the legacy LM393 "A" grade (±4 mV offset, 0°C to +70°C), while LM393B offers improved specs: ±0.37 mV offset, 2 kV HBM ESD, 36 V supply, and –40°C to +85°C operation. LM393ADGKRG4 is not a drop-in replacement for LM393B due to differing temperature range, offset, and ESD rating - redesign validation is required for migration.
LM393ADGKRG4 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, 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-VSSOP
LM393ADGKRG4 FAQ
1.How can I place an order for LM393ADGKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393ADGKRG4 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 LM393ADGKRG4 reliable?
The price and inventory of LM393ADGKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393ADGKRG4 is usually 5 days.
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LM393ADGKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393ADGKRG4 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 LM393ADGKRG4?
For technical support, including LM393ADGKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393ADGKRG4 requirements.
6.How does Aetrix verify that LM393ADGKRG4 is sourced from the original manufacturer or authorized distributors?
All LM393ADGKRG4 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 LM393ADGKRG4 meets industry standards.
7.What is the process for return or replacement of LM393ADGKRG4?
All LM393ADGKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM393ADGKRG4, 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 LM393ADGKRG4 part is unused and in its original packaging.
Return procedure for LM393ADGKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393ADGKRG4 Tags
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LM2903DR
Texas Instruments
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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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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