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Texas Instruments LM393ADRG4
- Part No.:
- LM393ADRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM393ADRG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,960
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Product details
Overview
LM393ADRG4 from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail input common-mode range including ground-used in server PSU overvoltage detection and motor drive current sensing.
For engineers reviewing the LM393ADRG4 datasheet, LM393ADRG4 pinout, LM393ADRG4 application, or LM393ADRG4 equivalent, this page delivers verified electrical specs, SOIC-8 package details, real-world use cases in industrial power systems, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM393ADRG4 implements open-collector output architecture enabling flexible pull-up voltage selection up to 36 V, with independent comparator channels sharing only the supply and ground terminals. Its input stage supports differential input voltages up to ±36 V and operates with inputs extending to VCC without damage.
Designed for robustness in noisy environments, it integrates dedicated ESD clamps delivering 2 kV HBM rating and maintains stable performance across −40°C to +85°C ambient temperature, with low input bias current (3.5 nA typ) minimizing source impedance errors in high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial and automotive power rails without external regulation |
| Input Offset Voltage (max) | ±4 mV over temperature - enables accurate threshold detection in precision level-shifting circuits |
| Quiescent Current | 600 µA max at 36 V - ensures low-power operation in battery-backed or energy-sensitive systems |
| Propagation Delay | 1 µs typical at 5 V - suitable for fast-response feedback loops in DC-DC converters and fault monitors |
| Input Bias Current (typ) | 3.5 nA - minimizes loading error on high-impedance sources like thermistors or photodiodes |
| Output Sink Current | 21 mA max - drives standard LEDs, MOSFET gates, or TTL logic directly without buffer stages |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
LM393ADRG4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with gull-wing leads optimized for automated PCB assembly and thermal dissipation via exposed pad grounding in compatible variants (not applicable to SOIC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector drain requiring external pull-up; sinks current when comparator trips |
| 1IN− | Inverting input of comparator 1 | Accepts reference or feedback signal; common-mode range includes ground |
| 1IN+ | Non-inverting input of comparator 1 | Accepts sensed voltage; supports input up to VCC without damage |
| GND | Ground reference | Common return for both comparators and pull-up resistors |
| 2IN+ | Non-inverting input of comparator 2 | Independent channel for secondary monitoring function (e.g., undervoltage lockout) |
| 2IN− | Inverting input of comparator 2 | Accepts second reference; fully decoupled from comparator 1 inputs |
| 2OUT | Comparator 2 output | Separate open-collector output enabling independent load control |
| VCC | Positive supply | Single supply powers both comparators; no split-rail requirement |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs from ground to VCC, eliminating need for level-shifting in single-supply systems |
| Open-collector outputs | Enable wired-OR logic, mixed-voltage interfacing (e.g., 3.3 V logic driving 24 V loads), and simplified fault-bus architectures |
| Low input offset drift | ±0.37 mV typical offset ensures consistent trip points across temperature and supply variations |
| High ESD tolerance | 2 kV HBM rating reduces risk of field failure during handling or system integration |
| Wide supply range compatibility | Functions identically from 2 V (low-power sensors) to 36 V (industrial controls), reducing BOM count |
Applications
| Server Power Supply Monitoring | Motor Drive Current Sensing |
|---|---|
Use Scenario: Detecting overvoltage conditions on +12 V and +5 V rails in redundant server PSUs to trigger shutdown before downstream damage occurs. IC Role / Device Role / Timing Role: Dual comparator independently compares each rail against precision references; outputs feed OR-gated fault latch. Use Value: Enables sub-1 µs response to transient overvoltage events, meeting IEC 62368-1 safety timing requirements. | Use Scenario: Monitoring shunt resistor voltage in BLDC motor phase legs to detect overcurrent and initiate PWM blanking. IC Role / Device Role / Timing Role: Comparator 1 senses high-side current; comparator 2 monitors low-side current; both feed interrupt-capable microcontroller inputs. Use Value: 1 µs propagation delay allows real-time current limiting within switching cycle boundaries, preventing IGBT shoot-through. |
| Industrial Temperature Control | Appliance Door Interlock System |
Use Scenario: Comparing thermistor voltage against upper/lower thresholds in HVAC controllers to maintain setpoint bands. IC Role / Device Role / Timing Role: LM393ADRG4 provides hysteresis-free window comparison using external resistive dividers on each input pair. Use Value: 3.5 nA input bias current prevents measurement error in high-resistance thermistor networks (≥100 kΩ). | Use Scenario: Validating mechanical door switch closure before enabling microwave magnetron or washing machine drum rotation. IC Role / Device Role / Timing Role: One comparator verifies switch continuity; second validates auxiliary safety interlock; outputs enable power relay only when both are active. Use Value: SOIC-8 package fits compact appliance control boards; 36 V rating accommodates 24 V solenoid drivers without level translation. |
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 and core specs; lacks G4 suffix indicating RoHS-compliant green molding compound and lead-free finish | No functional difference; LM393DR may require requalification for lead-free soldering processes or environmental compliance | Select LM393ADRG4 for new designs requiring IPC-1752-compliant materials and Pb-free assembly. |
| LM2903DR | Identical pinout and electrical specs but rated for −40°C to +125°C operating range vs. LM393ADRG4's −40°C to +85°C | Preferred in under-hood automotive or high-temperature industrial enclosures where extended thermal margin is required | Choose LM2903DR if ambient exceeds 85°C; otherwise LM393ADRG4 offers identical performance at lower cost. |
Compared with LM393DR, LM393ADRG4 adds RoHS compliance and tighter offset voltage distribution; versus LM2903DR, it trades extended temperature capability for lower unit cost and qualification effort in commercial-grade applications.
Availability
LM393ADRG4 is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive current sensing, and industrial temperature control requiring stable component supply across multi-year production cycles.
Supply support for LM393ADRG4 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 90 years of innovation in precision analog ICs.
The LM393x family was engineered for cost-sensitive, high-reliability industrial and consumer power management applications, emphasizing wide supply range, robust input tolerance, and open-collector flexibility.
FAQ
What is the maximum supply voltage for LM393ADRG4?
The LM393ADRG4 supports a maximum supply voltage of 36 V, as specified in its absolute maximum ratings. This allows direct interface with 24 V industrial buses and 32 V telecom supplies without external regulators. Operation above 36 V risks permanent damage, and the device is not rated for sustained operation at 38 V - that specification applies only to the newer LM393B variant.
Does LM393ADRG4 have rail-to-rail input capability?
Yes, the LM393ADRG4 features a rail-to-rail input common-mode voltage range that extends from ground (V−) to within 2 V of VCC. Either input can safely reach the positive supply rail without damage or output malfunction, making it ideal for single-supply systems where sensor signals swing near VCC or GND.
Can LM393ADRG4 drive a 5 V logic input directly?
No, LM393ADRG4 cannot drive a 5 V logic input directly because its outputs are open-collector and require an external pull-up resistor. To interface with 5 V CMOS or TTL inputs, connect a pull-up resistor from 2OUT or 1OUT to a 5 V supply; the comparator will sink current when active, pulling the node low.
What is the input offset voltage specification for LM393ADRG4?
The LM393ADRG4 has a maximum input offset voltage of ±4 mV over the full operating temperature range (−40°C to +85°C), with a typical value of ±0.37 mV at 25°C. This offset is measured differentially between IN+ and IN− pins and directly impacts threshold accuracy in precision level-detection circuits.
Is LM393ADRG4 pin-compatible with LM2903?
Yes, LM393ADRG4 is pin-compatible with LM2903 in SOIC-8 packaging, sharing identical pinout, electrical characteristics, and functional behavior. However, LM2903 is rated for −40°C to +125°C operation, while LM393ADRG4 is specified for −40°C to +85°C - thermal validation is required if substituting in high-temperature environments.
LM393ADRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
LM393ADRG4 FAQ
1.How can I place an order for LM393ADRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM393ADRG4 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 LM393ADRG4 reliable?
The price and inventory of LM393ADRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM393ADRG4 is usually 5 days.
3.What payment methods are accepted for LM393ADRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM393ADRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM393ADRG4?
LM393ADRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM393ADRG4 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 LM393ADRG4?
For technical support, including LM393ADRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM393ADRG4 requirements.
6.How does Aetrix verify that LM393ADRG4 is sourced from the original manufacturer or authorized distributors?
All LM393ADRG4 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 LM393ADRG4 meets industry standards.
7.What is the process for return or replacement of LM393ADRG4?
All LM393ADRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM393ADRG4, 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 LM393ADRG4 part is unused and in its original packaging.
Return procedure for LM393ADRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM393ADRG4 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
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