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Texas Instruments LM293ADR
- Part No.:
- LM293ADR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM293ADR.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,962
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Product details
Overview
LM293ADR from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 2–30 V, featuring ±9 mV max input offset voltage, 1.3 µs typical response time, 250 µA typical quiescent current per comparator, and rail-to-rail input common-mode range down to ground-used in power supply monitoring, motor control feedback, and industrial sensor interfaces.
For engineers reviewing the LM293ADR datasheet, LM293ADR pinout, LM293ADR application, or LM293ADR equivalent, this page delivers verified electrical specs, SOIC-8 package details, real-world use cases in server PSUs and cordless tools, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM293ADR implements open-collector output architecture with independent dual comparators, enabling flexible pull-up configuration and wired-OR logic. Its input stage supports common-mode voltages from ground to (VCC – 2 V), allowing direct sensing of low-side current shunts or battery terminals without level-shifting.
It operates with no phase-reversal under overdrive and maintains stable propagation delay across temperature (–25°C to +85°C) and supply voltage (2–30 V), making it suitable for threshold detection in noisy industrial environments where fast, deterministic switching is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - supports wide-input industrial and automotive auxiliary rails without external regulators |
| Input Offset Voltage (max) | ±9 mV - enables accurate 1% threshold detection at 1 V reference without trimming |
| Response Time (typ) | 1.3 µs - sufficient for PWM frequency monitoring up to ~300 kHz in motor drives |
| Quiescent Current (typ) | 250 µA per comparator - allows always-on monitoring in battery-backed systems with <1 µA total standby drain |
| Common-Mode Input Range | 0 V to (VCC – 2 V) - accepts ground-referenced signals and high-side sensing up to near-rail |
| Output Type | Open-collector - permits mixed-voltage interfacing (e.g., 3.3 V logic driving 12 V load) and wired-OR bus configurations |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for board-level ESD robustness in factory automation |
Pinout & Package
LM293ADR is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package with 4.90 mm × 3.91 mm body size, surface-mount footprint, and standard JEDEC MS-012AC lead form. Thermal resistance RθJA = 148.5°C/W enables operation at full rating without forced airflow in compact enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector drain - requires external pull-up; sinks up to 6 mA at 1.5 V saturation |
| 1IN− | Comparator 1 inverting input | Differential sensing node - accepts signals down to ground; tolerant of −0.3 V transient |
| 1IN+ | Comparator 1 non-inverting input | Reference or signal input - same CMVR as 1IN−; no phase reversal on overdrive |
| GND | Ground reference | Return path for both comparators and bias currents; must be low-impedance for noise immunity |
| 2IN+ | Comparator 2 non-inverting input | Independent threshold input - electrically isolated from comparator 1; shares GND and VCC |
| 2IN− | Comparator 2 inverting input | Second sensing node - identical specs to 1IN−; supports differential or single-ended use |
| 2OUT | Comparator 2 output | Open-collector drain - independently controllable; enables dual-threshold latching or window detection |
| VCC | Positive supply | Single power rail for both comparators - eliminates need for split supplies in cost-sensitive designs |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Supports direct connection to ground-referenced sensors (e.g., shunt resistors, thermistors) without level shifters |
| Open-collector outputs | Enables interface with multiple logic families (TTL, CMOS, MOS) and mixed-voltage systems via pull-up selection |
| No phase reversal under overdrive | Guarantees correct output state even when inputs exceed common-mode limits - critical for fault detection |
| Low input bias current (max 250 nA) | Minimizes voltage error in high-impedance divider networks (e.g., battery voltage monitoring with >1 MΩ dividers) |
| Specified performance from –25°C to +85°C | Validated operation across commercial/industrial ambient ranges - no derating needed for indoor equipment |
Applications
| Power Supply Monitoring | Motor Drive Feedback |
|---|---|
Use Scenario: Detecting undervoltage lockout (UVLO) and overvoltage protection (OVP) thresholds in server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: Dual comparator performs independent high/low threshold comparison on DC output rail using resistor dividers. Use Value: Enables fast (<2 µs) shutdown initiation before downstream damage occurs; open-collector outputs interface directly with PMBus alert lines. | Use Scenario: Monitoring back-EMF zero-crossing in BLDC motor commutation for sensorless control in cordless power tools. IC Role / Device Role / Timing Role: Comparator 1 detects rising edge, Comparator 2 detects falling edge of filtered back-EMF waveform. Use Value: Achieves precise timing alignment with 1.3 µs propagation delay; rail-to-rail inputs accept signals referenced to motor phase voltage. |
| Industrial Sensor Interface | Appliance Safety Interlock |
Use Scenario: Converting analog outputs from pressure transducers or RTDs into digital status flags for PLC input modules. IC Role / Device Role / Timing Role: Configured as window comparator to validate sensor output stays within calibrated bounds. Use Value: ±9 mV offset ensures ≤0.5% error at 1.8 V full-scale; low 250 µA supply current minimizes self-heating in sealed enclosures. | Use Scenario: Verifying door latch position and thermal cutoff status in washing machines and ovens before enabling heating elements. IC Role / Device Role / Timing Role: One comparator monitors microswitch closure, the other monitors bimetallic thermostat voltage drop. Use Value: Open-collector outputs drive optocouplers directly; guaranteed operation at 2 V supply allows compatibility with aging battery backup circuits. |
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; wider temp range (0°C to 70°C vs. –25°C to +85°C); ±9 mV offset, 1.3 µs response - identical electrical specs except temp grade | Not qualified for extended industrial ambient; unsuitable for enclosed motor tool housings exceeding 70°C | Select LM393DR only for cost-sensitive consumer-grade applications with controlled ambient |
| LM2903DR | SOIC-8; higher temp grade (–40°C to +125°C); ±7 mV offset; 1.3 µs response; 250 µA IQ - improved offset and extended range over LM293ADR | Valid for automotive under-hood and factory automation cabinets; requires no layout change | Choose LM2903DR when operating above 85°C or requiring tighter threshold accuracy without redesign |
Compared with LM293ADR, LM393DR offers identical performance at lower cost but reduced temperature margin, while LM2903DR provides superior thermal robustness and offset precision - both retain pinout and footprint compatibility for seamless upgrade paths.
Availability
LM293ADR is available at Aetrix Electronics and suitable for server PSU monitoring, cordless power tool motor control, and industrial sensor interface applications requiring stable component supply across multi-year production cycles.
Supply support for LM293ADR 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 personal electronics markets.
The LM293x series belongs to TI's legacy precision comparator product line, engineered for cost-effective, reliable threshold detection in high-volume industrial and appliance applications where robustness and long-term supply stability are critical.
FAQ
What is the maximum supply voltage rating for LM293ADR?
The LM293ADR has an absolute maximum supply voltage of 36 V, but its recommended operating range is 2 V to 30 V. Operation above 30 V risks exceeding specified electrical characteristics and may reduce long-term reliability. The device is not rated for continuous 36 V operation per its Recommended Operating Conditions table - sustained use at 30 V is the design limit for guaranteed performance across temperature.
Does LM293ADR support rail-to-rail input operation?
Yes, LM293ADR supports rail-to-rail input common-mode voltage from ground (0 V) up to (VCC – 2 V). This allows direct connection to ground-referenced sources like current-sense shunts or thermistor dividers. Inputs tolerate brief excursions to –0.3 V, but operation below ground risks incorrect output states and excessive input current per the datasheet Absolute Maximum Ratings.
Can LM293ADR drive a 5 V logic input directly?
No, LM293ADR cannot drive a 5 V logic input directly because it features open-collector outputs that require an external pull-up resistor. To interface with 5 V TTL or CMOS inputs, connect a pull-up resistor from each output (pins 1 and 7) to a 5 V rail. The output will sink current when active low, pulling the logic input to near 0 V; when inactive, the pull-up sets the logic input high.
What is the typical quiescent current of LM293ADR at 5 V supply?
The typical quiescent current of LM293ADR at 5 V supply and 25°C is 250 µA per comparator, totaling 500 µA for both channels. This value remains stable across the 2–30 V supply range and varies by less than ±10% from –25°C to +85°C, making it suitable for low-power always-on monitoring functions in battery-backed systems.
Is LM293ADR pin-compatible with LM393DR or LM2903DR?
Yes, LM293ADR is pin-compatible with both LM393DR and LM2903DR in the SOIC-8 package - all share identical pin numbering, function mapping, and footprint. No PCB layout changes are required when substituting between these devices. However, differences in temperature range, input offset, and ESD rating must be verified against system requirements before replacement.
LM293ADR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SOIC
LM293ADR FAQ
1.How can I place an order for LM293ADR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM293ADR 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 LM293ADR reliable?
The price and inventory of LM293ADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM293ADR is usually 5 days.
3.What payment methods are accepted for LM293ADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM293ADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM293ADR?
LM293ADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM293ADR 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 LM293ADR?
For technical support, including LM293ADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM293ADR requirements.
6.How does Aetrix verify that LM293ADR is sourced from the original manufacturer or authorized distributors?
All LM293ADR 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 LM293ADR meets industry standards.
7.What is the process for return or replacement of LM293ADR?
All LM293ADR units undergo pre-shipment inspection (PSI). If there is an issue with LM293ADR, 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 LM293ADR part is unused and in its original packaging.
Return procedure for LM293ADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM293ADR Tags
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LM2903DR
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LM339DR
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LM393DT
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LM2901PWR
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LM2903DT
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LM239DR
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LM2903P
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