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Analog Devices Inc. LTC1441IN8#PBF
- Part No.:
- LTC1441IN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LTC1441IN8#PBF.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,362
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Product details
Overview
LTC1441IN8#PBF from Analog Devices (formerly Linear Technology) is an ultralow power dual comparator with integrated 1.182V ±1% precision reference, programmable hysteresis capability (via HYST pin), TTL/CMOS-compatible rail-to-rail outputs, and 3.5µA typical supply current at –40°C to +85°C. It operates from single 2V–11V or dual ±1V–±5.5V supplies and is used in battery-powered voltage monitoring, threshold detection, and window comparator circuits.
For engineers reviewing the LTC1441IN8#PBF datasheet, LTC1441IN8#PBF pinout, LTC1441IN8#PBF application, or LTC1441IN8#PBF equivalent, key selection considerations include its dual-comparator architecture with independent inputs, V–-referenced reference output, hysteresis configurability, guaranteed input common-mode range to within 1.3V of V+, and output sourcing/sinking capability up to 40mA/5mA without crowbar current.
Technical Context
The LTC1441IN8#PBF integrates two independent comparators sharing a single internal 1.182V bandgap reference referenced to V–, enabling precise, low-drift threshold comparisons without external components. Its HYST pin supports adjustable hysteresis only on the LTC1440/LTC1442 variants - not on LTC1441 - confirming this part lacks hysteresis programming capability despite family-level documentation overlap.
Each comparator features rail-to-rail input operation from V– to (V+ − 1.3V), ±10pA typical input leakage, and CMOS outputs swinging between V– and V+. Unlike the LTC1440 (which has GND and V– pins separated), the LTC1441 uses V– as both negative supply and output swing reference, eliminating ground pin separation and simplifying dual-supply designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single: 2V to 11V; Dual: ±1V to ±5.5V - enables direct use in 3.3V, 5V, and ±5V systems without level-shifting. |
| Supply Current (TYP) | 3.5µA at –40°C to +85°C - ensures multi-year battery life in always-on sensor monitors and IoT endpoints. |
| Reference Voltage | 1.182V ±1% (0°C to 70°C), ±1.5% (–40°C to 85°C) - provides stable, factory-trimmed threshold for accurate low-voltage detection. |
| Input Offset Voltage | ±3mV (max, full temp range) - supports reliable detection of small signal differentials (e.g., 10mV overdrive yields 14µs propagation delay). |
| Propagation Delay | 14µs at 10mV overdrive, COUT = 100pF - balances speed and ultralow power for wake-up and alert generation. |
| Output Drive | Sources up to 40mA, sinks up to 5mA - directly drives LEDs, logic inputs, or small MOSFET gates without external buffers. |
| Input Common-Mode Range | V– to (V+ − 1.3V) - allows sensing near ground or high-side rails in single-supply configurations. |
Pinout & Package
Package: 8-lead PDIP (N8), lead-free, RoHS-compliant. Body dimensions: 9.27mm × 6.35mm × 3.3mm. Pin 1 identifier: notch or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Comparator A output | CMOS output swinging rail-to-rail between V– and V+; capable of 40mA source / 5mA sink. |
| 2 - V– | Negative supply | Reference node for both comparators and internal reference; must be ≤ V+ and ≥ GND in single-supply mode. |
| 3 - IN A+ | Noninverting input A | High-impedance (±10pA leakage) input with common-mode range from V– to V+ − 1.3V. |
| 4 - IN A– | Inverting input A | Identical electrical characteristics to IN A+; supports differential or single-ended sensing. |
| 5 - IN B– | Inverting input B | Independent second comparator input; no shared circuitry with Comparator A beyond V+ and V– rails. |
| 6 - IN B+ | Noninverting input B | Enables dual-threshold or window comparator top/bottom detection using same reference. |
| 7 - V+ | Positive supply | Accepts 2V–11V single or ±1V–±5.5V dual; bypassing with 0.1µF recommended if source impedance >1Ω. |
| 8 - OUT B | Comparator B output | Functionally identical to OUT A; supports independent logic generation per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Two fully isolated comparator cores sharing only V+, V–, and REF - enables simultaneous high/low threshold detection in battery monitors. |
| Integrated 1.182V reference | Factory-trimmed ±1% accuracy over 0°C–70°C; eliminates need for external precision reference and reduces BOM count. |
| Rail-to-rail CMOS outputs | Swing from V– to V+ with 40mA sourcing capability - directly interfaces with 3.3V/5V logic and drives indicator LEDs without series resistors. |
| No crowbar current | Eliminates supply glitches during output transitions - critical for noise-sensitive analog subsystems and mixed-signal PCB layouts. |
| Ultralow quiescent current | 3.5µA typ over –40°C to +85°C - enables decade-scale operation on coin cells in remote sensors and wearables. |
Applications
| Battery Voltage Monitor | Low-Power Threshold Detector |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during sleep mode to trigger wake-up at 3.0V and shut-down at 2.8V. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against internally referenced thresholds; OUT A signals low-voltage warning, OUT B triggers shutdown. Use Value: Eliminates external reference and resistor dividers, reducing standby current to <4µA while maintaining ±1% trip accuracy across temperature. | Use Scenario: Detecting when a 3.3V system rail drops below 3.0V due to brown-out or load surge. IC Role / Device Role / Timing Role: Single comparator (A or B) compares rail voltage (via divider) to 1.182V reference; hysteresis not supported on LTC1441 but fixed thresholds suffice for basic detection. Use Value: Achieves reliable detection with <3.5µA supply draw - 10× lower than standard comparators - extending hold-up time in backup power systems. |
| Window Comparator | Oscillator Circuit |
Use Scenario: Validating sensor output (e.g., thermistor voltage) stays within safe operating bounds (1.0V–1.3V). IC Role / Device Role / Timing Role: Comparator A detects upper limit (IN A+ tied to 1.3V ref), Comparator B detects lower limit (IN B– tied to 1.0V ref); OR'd outputs indicate in-window state. Use Value: Uses single IC with shared reference to enforce tight 300mV window with <4µA total current - ideal for portable medical devices. | Use Scenario: Building a low-power relaxation oscillator for timing or clock generation in energy-harvesting nodes. IC Role / Device Role / Timing Role: One comparator acts as Schmitt trigger with RC feedback; second comparator monitors charge/discharge cycles via reference-based thresholds. Use Value: Enables sub-10µA oscillator operation with stable frequency set by passive components - no crystal or external clock required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1442IN8#PBF | Includes HYST pin for programmable hysteresis; otherwise identical reference, supply current, and pinout. | Required where adjustable hysteresis is needed to prevent chatter in noisy environments (e.g., motor control feedback). | Select LTC1442IN8#PBF only if hysteresis configuration is mandatory; LTC1441IN8#PBF is preferred for fixed-threshold, cost-optimized designs. |
| TLV3702IDR | Lower supply current (1.8µA), rail-to-rail I/O, but no integrated reference - requires external 1.2V reference and resistor network. | Suitable for ultra-low-power apps where board space allows external reference; lacks monolithic simplicity of LTC1441IN8#PBF. | Choose TLV3702IDR only when <2µA supply current is critical and external reference integration is acceptable. |
Compared with LTC1442IN8#PBF, the LTC1441IN8#PBF omits hysteresis control but maintains identical accuracy, speed, and drive strength - making it optimal for deterministic threshold detection. Versus TLV3702IDR, it trades 1.7µA lower current for full integration, reducing component count and layout complexity in space-constrained designs.
Availability
LTC1441IN8#PBF is available at Aetrix Electronics and suitable for battery-powered system monitoring, ultralow-power threshold detection, and industrial sensor interface applications requiring stable component supply across extended temperature ranges.
Supply support for LTC1441IN8#PBF 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
Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC1441IN8#PBF belongs to the LTC® micropower comparator family, designed specifically for energy-constrained applications including portable instrumentation, remote sensors, and long-life battery systems where sub-5µA quiescent current and integrated precision reference are essential.
FAQ
Does the LTC1441IN8#PBF support hysteresis programming?
No, the LTC1441IN8#PBF does not support hysteresis programming. Unlike the LTC1440 and LTC1442 variants, it lacks a dedicated HYST pin. The LTC1441IN8#PBF is a dual comparator with fixed-threshold operation only. Hysteresis must be implemented externally using positive feedback if required for noise immunity in the target application.
What is the operating temperature range of the LTC1441IN8#PBF?
The LTC1441IN8#PBF is rated for –40°C to +85°C (Industrial grade). This is confirmed by the "I" suffix in the part number (LTC1441IN8#PBF) and specified in the Absolute Maximum Ratings table. Performance parameters such as supply current (3.5µA typ), reference accuracy (±1.5%), and input offset (±10mV max) are guaranteed across this full range.
Can the LTC1441IN8#PBF operate from a single 3.3V supply?
Yes, the LTC1441IN8#PBF operates from a single 3.3V supply. Connect V– to GND, V+ to 3.3V, and use the internal 1.182V reference to set thresholds. Input common-mode range extends from GND to 2.0V (V+ − 1.3V), and outputs swing rail-to-rail between GND and 3.3V - ensuring full compatibility with 3.3V logic systems.
Is the reference output of the LTC1441IN8#PBF buffered and capable of driving capacitive loads?
Yes, the LTC1441IN8#PBF reference output is internally buffered and can drive up to a 0.01µF bypass capacitor without oscillation. This is explicitly stated in the datasheet and verified in Typical Performance Characteristics (Figure G11–G13). For larger capacitors (>0.01µF), a series damping resistor (e.g., 10kΩ for 1µF) is required to maintain stability.
How does the LTC1441IN8#PBF differ from the LTC1440IN8#PBF?
The LTC1441IN8#PBF is a dual comparator, whereas the LTC1440IN8#PBF is a single comparator with separate GND and V– pins. The LTC1441IN8#PBF lacks the HYST pin and reference bypass flexibility of the LTC1440IN8#PBF but offers two independent comparator channels in the same 8-pin PDIP package. Both share the same 1.182V reference, supply current spec, and temperature range.
LTC1441IN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 2V ~ 11V, ±1V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- 40mA
- Current - Output (Typ):
- 5.7µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 15µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 8-PDIP
LTC1441IN8#PBF FAQ
1.How can I place an order for LTC1441IN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1441IN8#PBF 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 LTC1441IN8#PBF reliable?
The price and inventory of LTC1441IN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1441IN8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1441IN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1441IN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1441IN8#PBF?
LTC1441IN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1441IN8#PBF 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 LTC1441IN8#PBF?
For technical support, including LTC1441IN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1441IN8#PBF requirements.
6.How does Aetrix verify that LTC1441IN8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1441IN8#PBF 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 LTC1441IN8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1441IN8#PBF?
All LTC1441IN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1441IN8#PBF, 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 LTC1441IN8#PBF part is unused and in its original packaging.
Return procedure for LTC1441IN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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