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Texas Instruments LM3302D
- Part No.:
- LM3302D
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM3302D.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:838
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Product details
Overview
LM3302D from Texas Instruments is a quad voltage comparator IC designed for single- or dual-supply operation across 2 V to 28 V, featuring 0.8 mA typical supply current, 25 nA typical input bias current, and open-collector TTL/MOS/CMOS-compatible outputs - used in precision level detection and window comparator circuits in industrial control systems.
For engineers reviewing the LM3302D datasheet, LM3302D pinout, LM3302D application, or LM3302D equivalent, key selection criteria include input offset voltage (3 mV typ), common-mode range including ground, ±28 V differential input capability, and SOIC-14 package compatibility with automated assembly.
Technical Context
The LM3302D integrates four independent comparators with internal current regulation and rail-to-rail input capability down to ground. Its architecture supports wired-AND logic via open-collector outputs and maintains stable performance across −40°C to 85°C ambient temperature.
Each comparator exhibits low input offset current (3 nA typ), low input offset voltage (3 mV typ at 25°C), and fast response time (0.3 µs for TTL-level steps), enabling reliable threshold detection in mixed-signal monitoring and power sequencing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 28 V - enables direct use with 3.3 V, 5 V, 12 V, and 24 V industrial rails without level-shifting. |
| Input Offset Voltage | 3 mV typ at 25°C - ensures accurate threshold detection within ±3 mV error under nominal conditions. |
| Input Bias Current | 25 nA typ - minimizes loading on high-impedance sensor sources like thermistors or photodiodes. |
| Common-Mode Input Range | Includes ground to VCC−2 V - allows direct sensing of signals referenced to system ground. |
| Output Type | Open-collector - supports wired-AND logic, pull-up to any voltage ≤28 V, and interface with TTL/MOS/CMOS loads. |
| Response Time | 0.3 µs (TTL step) - suitable for real-time overvoltage/undervoltage monitoring in power supplies. |
| Supply Current (4 comp) | 0.8 mA typ - enables low-power operation in battery-backed or energy-constrained systems. |
Pinout & Package
LM3302D is housed in a 14-pin SOIC (D package) with standard JEDEC outline, 1.27 mm pitch, and RoHS-compliant NiPdAu finish. Thermal resistance θJA is 86°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5, 6, 8, 9, 12, 13 | Comparator Inputs (IN+, IN−) | Eight total input pins - four independent pairs supporting flexible signal referencing and hysteresis configuration. |
| 3, 4, 10, 11 | Comparator Outputs (OUT) | Open-collector outputs - require external pull-up; enable wired-AND logic and voltage-level translation. |
| 7 | GND | Ground reference for all comparators and internal biasing - must be connected to system ground plane. |
| 14 | VCC | Positive supply pin - accepts 2 V to 28 V; powers all four comparators and internal current regulators. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range including ground | Enables direct interfacing with ground-referenced sensors and ADC references without level-shifting circuitry. |
| Low input offset voltage (3 mV typ) | Reduces false triggering in precision window comparators used for battery voltage monitoring. |
| Independent supply current vs. VCC | Ensures consistent power consumption across wide input voltage swings - critical for unregulated supply monitoring. |
| Differential input voltage tolerance ±28 V | Allows safe comparison of signals exceeding supply rails - e.g., detecting overvoltage transients on 24 V lines. |
| Open-collector outputs compatible with TTL/MOS/CMOS | Permits flexible logic interfacing and multi-comparator wired-AND functions in fault-detection trees. |
Applications
| Power Supply Monitoring | Industrial Sensor Interface |
|---|---|
Use Scenario: Real-time detection of undervoltage lockout (UVLO) and overvoltage protection (OVP) thresholds in 12 V and 24 V DC power supplies. IC Role / Device Role / Timing Role: Quad comparator performing independent high/low threshold comparisons with hysteresis on each rail. Use Value: LM3302D's ±28 V differential input rating and ground-inclusive common-mode range allow direct connection to unregulated inputs without attenuators or clamps. | Use Scenario: Converting analog outputs from RTDs, thermocouples, or pressure transducers into digital logic states for PLC input modules. IC Role / Device Role / Timing Role: Level translator and threshold detector converting millivolt-level sensor signals into clean CMOS/TTL logic levels. Use Value: LM3302D's 25 nA input bias current prevents loading of high-impedance sensor bridges, preserving measurement accuracy. |
| Motor Control Fault Detection | Automated Test Equipment (ATE) |
Use Scenario: Monitoring phase currents and bus voltage in BLDC motor drives to trigger shutdown on overcurrent or overvoltage events. IC Role / Device Role / Timing Role: Fast-response comparator detecting fault conditions within microseconds to protect IGBT gate drivers. Use Value: LM3302D's 0.3 µs TTL-step response time meets real-time fault reaction requirements in safety-critical motor control loops. | Use Scenario: Implementing pass/fail go/no-go decisions on DUT output voltages during functional testing sequences. IC Role / Device Role / Timing Role: Precision reference comparator comparing measured DUT outputs against programmable thresholds stored in DACs. Use Value: LM3302D's 3 mV input offset voltage ensures sub-10 mV threshold accuracy - essential for validating 12-bit DAC linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Higher input offset voltage (7 mV max), wider temp range (−40°C to 125°C), same SOIC-14 package and open-collector outputs. | Preferred for automotive under-hood environments where extended temperature operation is required. | Select LM339DR when operating above 85°C ambient or when higher offset tolerance is acceptable. |
| TLV3704IDR | Rail-to-rail input/output, 1 µA supply current, 1.8 V to 16 V supply, but not rated for >24 V operation. | Suitable for low-voltage portable instrumentation, not for 24 V industrial monitoring. | Choose TLV3704IDR only for battery-powered systems requiring ultra-low power and rail-to-rail output swing. |
Compared with LM3302D, LM339DR offers broader temperature support but looser offset specs, while TLV3704IDR delivers rail-to-rail flexibility at the cost of reduced voltage range - making LM3302D optimal for 2–28 V industrial monitoring where ground-referenced inputs and moderate speed are prioritized.
Availability
LM3302D is available at Aetrix Electronics and suitable for industrial power monitoring, sensor interface design, and motor control fault detection requiring stable component supply and long-term manufacturability.
Supply support for LM3302D 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 with emphasis on reliability, longevity, and industrial-grade performance.
The LM3302D belongs to TI's legacy precision comparator family, engineered for robust operation in harsh industrial environments where wide supply range, ground-sensing capability, and open-collector interoperability are essential.
FAQ
What is the maximum supply voltage for LM3302D?
The absolute maximum supply voltage for LM3302D is 28 V, as specified in the Absolute Maximum Ratings table. Operation beyond this voltage risks permanent damage. The recommended operating range is 2 V to 28 V, and the device maintains stable performance across this full span - confirmed by electrical characteristics data at VCC = 5 V, 15 V, and 28 V in the datasheet. LM3302D is routinely used in 24 V industrial systems with margin to spare.
Does LM3302D support single-supply operation with inputs at ground?
Yes, LM3302D supports true single-supply operation with common-mode input voltage range extending to ground (0 V), as explicitly stated in the datasheet: "Common-Mode Input Voltage Range Includes Ground." This allows direct interfacing with ground-referenced sensors and reference voltages without level-shifting circuitry - a key differentiator versus older comparators requiring input bias above ground.
What is the output configuration of LM3302D and how should it be used?
LM3302D features open-collector outputs on all four comparators. Each output requires an external pull-up resistor to a logic-compatible voltage (≤28 V). This configuration enables wired-AND logic, voltage-level translation, and direct interfacing with TTL, MOS, and CMOS inputs. Do not leave outputs unconnected or shorted to VCC - the datasheet warns that shorting to VCC may cause excessive heating and destruction.
Can LM3302D replace LM339 in existing designs?
LM3302D is not a drop-in replacement for LM339 due to differences in input offset voltage (3 mV typ vs. 7 mV max), supply current (0.8 mA vs. 0.8 mA typ but higher variation), and pinout compatibility - both use SOIC-14 but internal pin assignments differ. LM3302D has dedicated input/output pairing per comparator, while LM339 uses a shared VCC/GND layout. Redesign verification is required before substitution; LM3302D is best applied in new designs prioritizing tighter offset and ground-sensing capability.
Is LM3302D RoHS compliant and what is its moisture sensitivity level?
Yes, LM3302D is RoHS compliant and green (halogen-free), with NiPdAu lead finish and Moisture Sensitivity Level (MSL) 1 - rated for unlimited floor life at ≤30°C/85% RH and peak reflow temperature of 260°C. This MSL-1 rating simplifies manufacturing logistics, eliminating bake requirements prior to reflow soldering - confirmed in TI's Package Option Addendum dated 6-Feb-2020.
LM3302D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- CMOS, MOS, Open-Collector, TTL
- Voltage - Supply, Single/Dual (±):
- 2V ~ 28V, ±1V ~ 14V
- :
- 20mV @ 28V
- Voltage - Input Offset (Max):
- 0.5µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 800µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM3302D FAQ
1.How can I place an order for LM3302D through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3302D 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 LM3302D reliable?
The price and inventory of LM3302D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3302D is usually 5 days.
3.What payment methods are accepted for LM3302D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3302D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3302D?
LM3302D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3302D 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 LM3302D?
For technical support, including LM3302D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3302D requirements.
6.How does Aetrix verify that LM3302D is sourced from the original manufacturer or authorized distributors?
All LM3302D 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 LM3302D meets industry standards.
7.What is the process for return or replacement of LM3302D?
All LM3302D units undergo pre-shipment inspection (PSI). If there is an issue with LM3302D, 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 LM3302D part is unused and in its original packaging.
Return procedure for LM3302D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3302D Tags
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