My Inquiry
My Account
Analog Devices Inc. LTC1841CS8#PBF
- Part No.:
- LTC1841CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1841CS8#PBF.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,716
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1841CS8#PBF from Analog Devices (formerly Linear Technology) is an ultralow-power dual comparator IC with rail-to-rail input capability and open-drain outputs, designed for battery-powered monitoring circuits. It operates from a single 2V–11V or dual ±1V–±5.5V supply, draws only 3.5µA typical supply current, features ±3mV input offset voltage, and supports input common-mode range from V– to V+ – 1.3V - enabling direct sensing of low-voltage battery thresholds in portable Li-ion systems.
For engineers reviewing the LTC1841CS8#PBF datasheet, LTC1841CS8#PBF pinout, LTC1841CS8#PBF application, or LTC1841CS8#PBF equivalent, key selection considerations include its 12µs propagation delay at 10mV overdrive, 20mA output sink capability, absence of switching-induced supply glitches, and SO-8 package compatibility with space-constrained embedded monitoring designs.
Technical Context
The LTC1841CS8#PBF implements two independent comparators with inputs referenced to V–, each featuring open-drain NMOS output stages capable of sinking >20mA while maintaining sub-5.7µA total quiescent current across temperature. Its input stage operates down to the negative rail and up to 1.3V below the positive rail, eliminating need for level-shifting in single-supply battery-sense configurations.
No internal reference or hysteresis circuitry is present - unlike LTC1842/LTC1843 variants - making it suitable for applications requiring externally defined thresholds and custom hysteresis networks. The absence of REF and HYST pins simplifies PCB layout where integrated reference functionality is unnecessary.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single: 2V to 11V; Dual: ±1V to ±5.5V - supports wide-input battery systems including 1–4 cell Li-ion and alkaline stacks. |
| Quiescent Current | 3.5µA typical, ≤5.7µA max over temperature - enables multi-year operation on coin-cell or small Li-ion batteries. |
| Input Offset Voltage | ±3mV typical, ±10mV max - ensures accurate threshold detection without trimming in low-power voltage-monitoring circuits. |
| Input Common-Mode Range | V– to V+ – 1.3V - allows direct connection to battery terminals without resistor dividers or bias networks. |
| Propagation Delay | 12µs at 10mV overdrive, 4µs at 100mV - provides predictable response timing for undervoltage lockout (UVLO) and charge termination logic. |
| Output Sink Current | >20mA typical - drives LEDs, MOSFET gates, or pull-down loads directly without external buffers. |
| Input Leakage Current | ±0.01nA typical - minimizes error in high-impedance divider-based sensing networks. |
Pinout & Package
Package: 8-lead plastic SO-8 (narrow, 0.150-inch width), RoHS-compliant, surface-mountable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Comparator A open-drain output | Sinks >20mA; requires external pull-up for logic-high assertion; enables wired-OR and level-shifting. |
| V– (Pin 2) | Negative supply rail | Reference ground for both comparators and input common-mode range; connects to battery negative or system GND. |
| IN A+ (Pin 3) | Noninverting input of Comparator A | Accepts signals from V– to V+ – 1.3V; 10pA leakage enables high-Z resistive dividers. |
| IN A– (Pin 4) | Inverting input of Comparator A | Matches IN A+ specs; used for standard inverting comparator configuration or window detector top threshold. |
| IN B– (Pin 5) | Inverting input of Comparator B | Independent second comparator input; supports dual-threshold detection (e.g., UVLO + OVLO). |
| IN B+ (Pin 6) | Noninverting input of Comparator B | Enables noninverting configuration for second threshold; same voltage range and leakage as IN A±. |
| V+ (Pin 7) | Positive supply rail | Accepts 2V–11V single or ±1V–±5.5V dual supply; bypass capacitor recommended for transient immunity. |
| OUT B (Pin 8) | Comparator B open-drain output | Functionally identical to OUT A; allows independent control of two system states (e.g., LBO and CHG_DONE). |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow supply current | 3.5µA typical enables >10-year battery life in always-on monitoring nodes. |
| Rail-to-rail input capability | Input range from V– to V+ – 1.3V eliminates need for external biasing in single-supply battery sensing. |
| Glitch-free switching | No cross-conduction current during output transitions prevents supply rail disturbance in sensitive analog subsystems. |
| High output sink strength | >20mA per output drives MOSFET gates or indicator LEDs directly, reducing BOM count. |
| Low input leakage | ±0.01nA typical preserves accuracy in megaohm-level voltage divider networks. |
Applications
| Battery Voltage Monitoring | Low-Battery Disconnect |
|---|---|
|
Use Scenario: Real-time monitoring of single-cell Li-ion battery voltage during discharge to prevent deep depletion. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against programmable upper (OVLO) and lower (UVLO) thresholds using resistor dividers. Use Value: Enables precise 3.0V undervoltage cutoff and 4.2V overvoltage protection without external reference or hysteresis components. |
Use Scenario: Automatic disconnection of load when battery voltage drops below safe operating level. IC Role / Device Role / Timing Role: LTC1841CS8#PBF drives gate of high-side PMOS switch via open-drain output and pull-up network. Use Value: Prevents battery damage from over-discharge while consuming only nanowatts in standby state. |
| Charge Termination Control | Window Detector for Power Rails |
|
Use Scenario: Signaling full-charge condition in linear or switching battery chargers. IC Role / Device Role / Timing Role: Comparator B triggers CHG_DONE flag when battery reaches 4.2V ±1%, using precision resistor divider. Use Value: Eliminates need for dedicated charge management ICs in cost-sensitive portable designs. |
Use Scenario: Validating that 3.3V or 5V system rail remains within ±5% tolerance during operation. IC Role / Device Role / Timing Role: One comparator monitors upper limit, the other lower limit; outputs combined via OR logic. Use Value: Provides fail-safe power-good indication with <12µs response to out-of-spec conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1441CS8#PBF | Includes integrated 1.182V ±1% reference; no REF/HYST pins; 1.5µA higher ICC (5µA typ) | Requires no external reference but lacks flexibility for custom threshold setting | Choose when reference stability outweighs design flexibility and ultra-low ICC is secondary |
| TLV3702IDR | Lower VOS (±1.5mV), wider supply (1.8V–16V), but 800nA higher ICC (800nA vs 3.5µA) | Higher speed (1.5µs delay) but unsuitable for multi-year battery life requirements | Prefer for AC-powered or short-duration portable devices needing tighter offset and faster response |
Compared with LTC1441CS8#PBF and TLV3702IDR, the LTC1841CS8#PBF uniquely balances sub-4µA quiescent current, rail-to-rail input, and dual-comparator independence - making it optimal for long-life battery systems where external reference control and minimal supply interaction are critical.
Availability
LTC1841CS8#PBF is available at Aetrix Electronics and suitable for battery-powered system monitoring, threshold detection, window comparator circuits, and low-power oscillator designs requiring stable component supply and long-term lifecycle support.
Supply support for LTC1841CS8#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 acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for legacy Linear parts including the LTC series.
The LTC1841CS8#PBF belongs to Linear's ultralow-power comparator family, engineered specifically for energy-constrained applications such as portable medical devices, IoT sensors, and battery-management subsystems where microamp-level current budgeting is mandatory.
FAQ
What is the maximum supply voltage rating for the LTC1841CS8#PBF?
The LTC1841CS8#PBF has an absolute maximum V+ to V– rating of 12V. Its operational single-supply range is 2V to 11V, and dual-supply range is ±1V to ±5.5V. Exceeding 11V in normal operation or 12V in transient conditions risks permanent damage per Absolute Maximum Ratings table.
Does the LTC1841CS8#PBF include an internal voltage reference?
No, the LTC1841CS8#PBF does not include an internal voltage reference. Unlike LTC1842/LTC1843 variants, it lacks REF and HYST pins. Thresholds must be set externally using resistor dividers or precision references, giving designers full control over reference source and accuracy.
Can the LTC1841CS8#PBF drive a MOSFET gate directly?
Yes, the LTC1841CS8#PBF open-drain outputs can sink >20mA, sufficient to charge/discharge typical small-signal MOSFET gates (e.g., Si9924DY) within microseconds. For high-capacitance power MOSFETs, a buffer stage is recommended to ensure fast switching without exceeding output current limits.
What is the input common-mode voltage range of the LTC1841CS8#PBF?
The LTC1841CS8#PBF input common-mode range extends from V– to V+ – 1.3V. This allows direct connection to battery terminals in single-supply configurations - for example, monitoring a 4.2V Li-ion cell with V– = 0V and V+ = 5V yields usable input range from 0V to 3.7V.
Is the LTC1841CS8#PBF RoHS-compliant and lead-free?
Yes, the LTC1841CS8#PBF is RoHS-compliant and lead-free. The #PBF suffix explicitly denotes lead-free packaging per Analog Devices' part numbering convention, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements for surface-mount assembly.
LTC1841CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2V ~ 11V, ±1V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 5.7µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SO
LTC1841CS8#PBF FAQ
1.How can I place an order for LTC1841CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1841CS8#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 LTC1841CS8#PBF reliable?
The price and inventory of LTC1841CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1841CS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1841CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1841CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1841CS8#PBF?
LTC1841CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1841CS8#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 LTC1841CS8#PBF?
For technical support, including LTC1841CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1841CS8#PBF requirements.
6.How does Aetrix verify that LTC1841CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1841CS8#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 LTC1841CS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1841CS8#PBF?
All LTC1841CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1841CS8#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 LTC1841CS8#PBF part is unused and in its original packaging.
Return procedure for LTC1841CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1841CS8#PBF Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
