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HomeProductsIntegrated Circuits (ICs)Linear - ComparatorsLTC1441IN8#PBF
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LTC1441IN8#PBF - Analog Devices Inc.

Manufacturer Part Number
LTC1441IN8#PBF
Manufacturer
Analog Devices, Inc.
Allelco Part Number
98D-LTC1441IN8#PBF
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
39,787 pcs available, New & Original
Parts Description
IC COMPARATOR 2 GEN PUR 8DIP
Package
8-PDIP
Data sheet
LTC1441IN8#PBF.pdf

Environmental Information

Material Declaration LTC1441IN8#PBF.pdf
RoHs Status
ROHS3 Compliant
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In stock: 39787
  • Unit Price: $3.432
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Specifications

LTC1441IN8#PBF Tech Specifications
Analog Devices Inc. - LTC1441IN8#PBF technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc. - LTC1441IN8#PBF

Product Attribute Attribute Value
Manufacturer Analog Devices, Inc.
Voltage - Supply, Single/Dual (±) 2V ~ 11V, ±1V ~ 5.5V
Voltage - Input Offset (Max) 10mV @ 5V
Type General Purpose
Supplier Device Package 8-PDIP
Series -
Propagation Delay (Max) 15µs
Package / Case 8-DIP (0.300', 7.62mm)
Package Tube
Output Type CMOS, TTL
Product Attribute Attribute Value
Operating Temperature -40°C ~ 85°C
Number of Elements 2
Mounting Type Through Hole
Hysteresis -
Current - Quiescent (Max) 5.7µA
Current - Output (Typ) 40mA
Current - Input Bias (Max) -
CMRR, PSRR (Typ) 80dB CMRR, 80dB PSRR
Base Product Number LTC1441

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

How does the LTC1441IN8#PBF handle input offset voltage in precision analog applications, and what design considerations arise when operating near its specified maximum of 10mV at 5V supply?
The LTC1441IN8#PBF features a maximum input offset voltage of 10mV at 5V supply, which directly impacts precision signal conditioning in high-gain amplifier or sensor interface circuits. This parameter becomes significant when amplifying small differential signals below 100mV, where even minor offsets can lead to output saturation or reduced dynamic range. Engineers must ensure that system gain stages are designed with sufficient headroom, or consider calibration techniques to compensate for this offset. In battery-powered applications where supply voltage drifts, the offset may vary, requiring margin analysis across temperature and supply conditions. The low quiescent current of 5.7µA further supports such designs by minimizing power consumption without sacrificing stability.
What are the key performance trade-offs when using dual comparators like the LTC1441IN8#PBF in space-constrained PCB layouts compared to discrete comparator solutions?
Integrating two general-purpose comparators in a single 8-DIP package like the LTC1441IN8#PBF reduces component count and board footprint compared to using two separate ICs, but introduces coupling risks due to shared supply rails and thermal profiles. While the device offers consistent propagation delay (max 15µs) and matched CMRR (80dB), layout symmetry must be carefully maintained to avoid crosstalk, especially in mixed-signal environments. Discrete comparators allow independent biasing and grounding strategies, offering greater flexibility in noise isolation. However, the LTC1441IN8#PBF’s integrated nature improves timing correlation between channels—critical in window detection or dual-threshold monitoring systems—making it preferable when synchronization outweighs layout complexity concerns.
Can the LTC1441IN8#PBF reliably drive TTL logic levels from CMOS inputs, and under what supply conditions does this compatibility break down?
Yes, the LTC1441IN8#PBF supports both CMOS and TTL outputs, enabling direct interfacing between modern CMOS microcontrollers and legacy TTL-based subsystems. This dual-output capability functions effectively within the specified supply range of 2V to 11V single-supply or ±1V to ±5.5V dual-supply operation. However, when operating near the lower end of the supply range—such as 2.5V single supply—the output high level may drop close to the input threshold, potentially violating TTL high-level specifications (typically V_IH > 2.0V). Therefore, in low-voltage systems, verifying actual output levels with a scope or logic analyzer is recommended to confirm clean transitions before committing to TTL signaling paths.
How does the propagation delay of 15µs in the LTC1441IN8#PBF influence real-time control loop design, particularly in motor control or power management applications?
With a maximum propagation delay of 15µs per comparator stage, the LTC1441IN8#PBF introduces measurable latency in feedback-critical systems. For example, in a buck converter using hysteretic control, this delay can shift the switching node edge timing, affecting frequency stability and ripple magnitude. In a motor driver application requiring fast overcurrent protection, the 15µs response time may be acceptable for slow-to-react faults but insufficient for sub-millisecond transients. Designers should account for this delay when calculating minimum dead times or setting comparator thresholds to avoid false triggering during rapid signal changes. Additionally, cascading multiple comparator stages multiplies this latency, making single-stage architectures like the LTC1441IN8#PBF advantageous for time-sensitive decisions.
What role does the common-mode rejection ratio (CMRR) of 80dB play in noisy industrial environments when using the LTC1441IN8#PBF?
An 80dB CMRR means the LTC1441IN8#PBF attenuates input noise or interference that appears equally on both comparator inputs by a factor of 10,000. In environments with electromagnetic interference (EMI) or ground loops—such as factory floors or HVAC systems—this helps preserve accurate decision-making by rejecting common-mode disturbances. For instance, if a 100mV noise spike appears across both inputs due to poor shielding, only 10µV will appear at the output after CMRR filtering. This characteristic is particularly valuable in sensor measurement circuits where the signal of interest is small relative to ambient noise. Still, proper layout practices—like star grounding and differential routing—are essential to fully leverage this specification.
Is the LTC1441IN8#PBF suitable for battery-operated devices requiring ultra-low power operation beyond just quiescent current considerations?
While the LTC1441IN8#PBF consumes only 5.7µA maximum quiescent current—a strong attribute for low-power systems—its total energy consumption also depends on switching dynamics. Each comparator can source/sink up to 40mA, meaning brief high-current pulses during output transitions may dominate average current draw in duty-cycled applications. In a battery monitor circuit sampling every 10 seconds, the comparator spends most time idle, making the LTC1441IN8#PBF highly efficient. However, in continuous-sampling modes or with capacitive loads, the turn-on transient current could reduce effective runtime. Thus, while the IC excels in static power savings, system-level duty cycling remains critical for optimal battery life.
How should hysteresis be implemented externally when using the LTC1441IN8#PBF for noise immunity in threshold detection, and what impact does added hysteresis have on propagation delay?
Since the LTC1441IN8#PBF does not include internal hysteresis, designers typically add external positive feedback through a resistor network connected from the output to the non-inverting input. For a 100mV hysteresis target in a 5V system, a typical configuration uses a 100kΩ feedback resistor and a 10kΩ resistor from the input to ground, creating a voltage divider that shifts the trip point dynamically. This method introduces negligible additional propagation delay—well within the existing 15µs limit—because the feedback path operates passively and does not alter the comparator’s internal switching speed. However, excessive resistor values increase susceptibility to leakage currents and noise pickup, so balancing impedance and stability is necessary.
What environmental and regulatory factors must be considered when sourcing and deploying the LTC1441IN8#PBF in commercial or industrial equipment?
The LTC1441IN8#PBF is RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99, facilitating global distribution without export restrictions. Its MSL rating of 1 allows unlimited storage time without baking, simplifying inventory management. Operating temperature range spans -40°C to 85°C, aligning with industrial standards and automotive-grade expectations. These attributes make the part suitable for embedded systems in harsh environments, including factory automation, telecom infrastructure, and remote sensing nodes. No special handling or certification beyond standard ESD precautions is required, reducing compliance overhead during mass production and assembly.
How does the dual-element architecture of the LTC1441IN8#PBF benefit system redundancy or parallel processing compared to single-channel alternatives?
The inclusion of two independent comparators in a single 8-PDIP package enables compact implementation of redundant monitoring functions—such as dual overvoltage detection for critical supplies—without duplicating footprints or increasing BOM complexity. Both comparators share the same supply and ground, ensuring correlated response behavior across temperature and process variations. This symmetry enhances reliability in safety-critical applications where one channel can serve as a backup if failure modes are mutually exclusive. Additionally, the matched propagation delays allow synchronized decision-making in phase-comparison or envelope-detection schemes, improving timing accuracy over discrete solutions where channel mismatches could introduce skew.
When replacing an existing comparator in a legacy design with the LTC1441IN8#PBF, what compatibility issues might arise regarding pinout and mechanical integration?
The LTC1441IN8#PBF uses an 8-pin PDIP package with a standard 0.3" spacing, ensuring drop-in compatibility with many legacy DIP socketed designs. However, careful verification of pin functions against the original schematic is essential, as some single-comparator replacements may map different pins to V+, V-, and OUT. For example, if the prior design relied on open-drain output requiring an external pull-up, but the new comparator drives CMOS/TTL levels actively, level-shifting circuitry may be needed. Mechanical fit is generally assured, but double-checking solder joint accessibility in dense boards prevents rework risks. Thermal performance remains similar due to equivalent die size and packaging, preserving reliability under extended operation.
In what scenarios would the LTC1441IN8#PBF outperform faster comparator families despite its 15µs propagation delay?
The LTC1441IN8#PBF trades speed for superior power efficiency and integration density, making it ideal in applications where bandwidth requirements are modest but longevity and simplicity are paramount. Examples include battery-backed RTC alarms, low-frequency sensor comparators, or LED fault detectors operating at <1kHz rates. Here, the 5.7µA quiescent current yields years of operation on a coin cell, whereas faster comparators consuming hundreds of µA would deplete the battery rapidly. Furthermore, the dual-channel feature reduces board area and cost in multi-sensor systems, providing better value than two discrete high-speed parts. Speed-critical tasks like ADC triggering or RF envelope detection remain better served by specialized devices, but for infrequent decisions, the LTC1441IN8#PBF delivers optimal balance.
How does the input bias current behavior of the LTC1441IN8#PBF affect high-impedance sensor interfaces, and what mitigation strategies exist?
Although the datasheet lists "Current - Input Bias (Max)" as unspecified, the CMOS input stage implies extremely low bias current—likely in the picoampere range—minimizing loading effects on high-resistance sources like thermistors or piezoelectric sensors. This allows direct connection without buffer amplifiers, preserving signal integrity in low-power measurement chains. However, long trace lengths or high parasitic capacitance can interact with even tiny leakage currents to create RC time constants that distort transient responses. To mitigate, keep input traces short, use guard rings around sensitive nodes, and avoid floating inputs. Given the 10mV max offset voltage, these precautions are especially important when interfacing with millivolt-level sensor outputs.
What advantages does Through Hole mounting provide when deploying the LTC1441IN8#PBF in prototyping versus surface-mount alternatives?
The Through Hole package of the LTC1441IN8#PBF simplifies manual soldering and debugging during prototype development, allowing easy probing with oscilloscopes or multimeters via accessible leads. It also withstands higher mechanical stress and vibration better than SOIC variants, making it suitable for ruggedized test setups or educational labs where repeated connections occur. While SMT packages offer superior high-frequency performance and miniaturization, the PDIP format ensures reliable hand-soldered joints without hot air rework tools. For low-volume iterations or breadboarding, this approach accelerates design validation cycles without committing to reflow processes or custom PCBs early.
How should supply decoupling be implemented around the LTC1441IN8#PBF to minimize PSRR degradation and ensure stable operation?
The LTC1441IN8#PBF exhibits 80dB PSRR, meaning it rejects power supply noise by a factor of 10,000. To maintain this performance, place a 100nF ceramic capacitor as close as possible to the V+ and GND pins, preferably with a 10µF tantalum or electrolytic capacitor nearby for bulk filtering. Avoid routing digital return currents through the analog ground plane near the IC, as switching noise couples into the supply rail. Use a solid ground plane and star topology if multiple regulators feed the circuit. Decoupling effectiveness drops significantly above 1MHz, so additional ferrite beads or RC filters may be needed in noisy environments to preserve comparator stability during transient load events.
What design constraints emerge when cascading the LTC1441IN8#PBF in a window detector configuration for undervoltage/overvoltage protection?
Implementing a window detector with two instances of the LTC1441IN8#PBF requires careful matching of input offset voltages and propagation delays to prevent race conditions near threshold boundaries. Since each comparator has up to 10mV offset, slight mismatches can cause one comparator to trigger slightly earlier than intended, leading to asymmetric window edges. Additionally, the combined propagation delay (up to 30µs total) introduces latency in fault response, which may violate safety timelines in fast-responding protection circuits. Using external precision resistors for threshold setting helps stabilize trip points, and adding small hysteresis ensures clean switching. The dual-channel advantage here lies in shared calibration and compact layout, but system-level timing budgets must include the cumulative delay.
How does the operating temperature range of -40°C to 85°C influence component selection for outdoor or automotive applications using the LTC1441IN8#PBF?
The industrial temperature grade (-40°C to 85°C) of the LTC1441IN8#PBF covers most commercial and light-industrial environments, including outdoor enclosures exposed to seasonal extremes or unheated garages. Unlike automotive-grade parts rated to 125°C, this range suffices for non-powertrain systems such as security panels, irrigation controllers, or remote telemetry units. However, thermal derating may still apply: at 85°C, the absolute maximum ratings must not be exceeded, and solder joint integrity should be verified under thermal cycling. For applications requiring wider margins or higher reliability, conformal coating and stress-free PCB layout further enhance robustness, extending functional lifespan beyond basic spec limits.
Why might a designer choose the tube-packaged LTC1441IN8#PBF over tape-and-reel for small-batch production, and what logistical implications does this entail?
The tube packaging of the LTC1441IN8#PBF suits low-volume prototyping or repair scenarios where automated pick-and-place equipment isn’t available or economical. It allows manual handling and visual inspection before soldering, reducing risk of damage during handling. Logistically, tubes occupy less storage space than reels and simplify inventory tracking for sporadic usage patterns. However, they lack the protection of moisture barriers present in reel packaging, necessitating controlled storage conditions if unused components are kept long-term. For high-volume runs, switching to reel packaging reduces assembly costs and improves machine feeding reliability, but for R&D or pilot lines, the tube format offers practicality without sacrificing performance.
How does the LTC1441IN8#PBF compare to other dual comparators like the LM393 or MAX902 in terms of power efficiency and output characteristics for battery-powered IoT endpoints?
Compared to the LM393—which lacks push-pull output and draws higher quiescent current (~180µA)—the LTC1441IN8#PBF offers significantly lower power consumption (5.7µA vs. 180µA) and active drive capability, eliminating need for external pull-ups and improving response speed. Against the MAX902 (dual, 1.7µA typical), the LTC1441IN8#PBF trades marginal current savings for broader supply range (up to 11V single-supply) and robust 40mA output drive, useful in noisy environments where output glitches must be suppressed quickly. The MAX902 excels in nanoamp sleep modes, but the LTC1441IN8#PBF provides better versatility for moderate-duty applications requiring both low idle power and strong output swing. Choice depends on whether ultra-low sleep current or flexible voltage operation dominates system priorities.

Parts with Similar Specifications

The three parts on the right have similar specifications to Analog Devices Inc. LTC1441IN8#PBF

Product Attribute LTC1441CN8#PBF LTC1441IS8#TRPBF LTC1441IS8#PBF LTC1441CS8#PBF
Part Number LTC1441CN8#PBF LTC1441IS8#TRPBF LTC1441IS8#PBF LTC1441CS8#PBF
Manufacturer Analog Devices Inc. Analog Devices Inc. Analog Devices Inc. Analog Devices Inc.
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Current - Input Bias (Max) - - - -
Type - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage - Input Offset (Max) - - - -
CMRR, PSRR (Typ) - - - -
Series - - - -
Hysteresis - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Current - Output (Typ) - - - -
Propagation Delay (Max) - - - -
Number of Elements - - - -
Voltage - Supply, Single/Dual (±) - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Mounting Type - Surface Mount Through Hole Surface Mount
Current - Quiescent (Max) - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C

LTC1441IN8#PBF Datasheet PDF

Download LTC1441IN8#PBF pdf datasheets and Analog Devices Inc. documentation for LTC1441IN8#PBF - Analog Devices Inc..

Datasheets
LTC1440,41,42 Datasheet.pdf
PCN Design/Specification
Multiple Parts 06/Aug/2022.pdf Mult Dev 11/Oct/2022.pdf
Environmental Information
Material Declaration LTC1441IN8#PBF.pdf

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LTC1441IN8#PBF Image

LTC1441IN8#PBF

Analog Devices Inc.
98D-LTC1441IN8#PBF

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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