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Analog Devices Inc. LTC1443IS#TRPBF
- Part No.:
- LTC1443IS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1443IS#TRPBF.pdf
- Description:
- IC COMPARATOR 4 W/VOLT REF 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,713
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Product details
Overview
LTC1443IS#TRPBF from Analog Devices (formerly Linear Technology) is an ultralow power quad comparator with integrated 1.182V ±1% precision reference, TTL/CMOS-compatible push-pull outputs, and operation from single 2V–11V or dual ±1V–±5.5V supplies. It delivers ≤8.5µA supply current over temperature, supports input common-mode range from V– to V+ – 1.3V, and sources up to 40mA per output - ideal for battery-powered voltage monitoring and threshold detection in industrial sensor interfaces.
For engineers reviewing the LTC1443IS#TRPBF datasheet, LTC1443IS#TRPBF pinout, LTC1443IS#TRPBF application, or LTC1443IS#TRPBF equivalent, key selection criteria include its guaranteed 1.182V reference accuracy across –40°C to +85°C, absence of crowbar current during output transitions, 12µs typical propagation delay at 10mV overdrive, and compatibility with 0.01µF reference bypass capacitance without oscillation.
Technical Context
The LTC1443IS#TRPBF integrates four independent comparators sharing a single bandgap reference referenced to V–, with dedicated GND pin (Pin 14) for output stage return - enabling true split-supply operation (±1V to ±5.5V) while maintaining TTL logic compatibility. Its input stage features picoamp-level leakage (±10pA typ) and rail-to-rail input capability down to V–.
Unlike LTC1444/LTC1445 variants, the LTC1443IS#TRPBF lacks programmable hysteresis and HYST pin functionality; instead, it uses Pin 14 as GND and provides push-pull outputs capable of continuous 40mA sourcing and 0.8mA sinking - eliminating external pull-up resistors and reducing system power in always-on monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | ≤8.5µA max over full –40°C to +85°C range - enables multi-year operation on coin-cell batteries. |
| Reference Voltage | 1.182V ±1% (C-temp), ±1.5% (I-temp) - stable reference for precision threshold setting without external components. |
| Propagation Delay | 12µs typical at 10mV overdrive, COUT = 100pF - sufficient speed for slow-varying signals like battery voltage or temperature ramps. |
| Input Common-Mode Range | V– to V+ – 1.3V - supports direct sensing of signals near ground or high-side rails in single-supply systems. |
| Output Drive | 40mA continuous source, 0.8mA sink - drives LEDs, small relays, or microcontroller inputs directly without buffer stages. |
| Reference Load Capability | Sources 200µA / sinks 15µA with ≤1mV/≤2.5mV deviation - supports local decoupling with 0.01µF capacitor, eliminating noise-induced false triggering. |
| Supply Voltage Range | Single: 2V–11V; Dual: ±1V–±5.5V - accommodates wide input ranges including 3.3V, 5V, and legacy ±5V systems. |
Pinout & Package
Package: 16-pin SO (Small Outline), 150°C/W θJA, industrial temperature grade (–40°C to +85°C), tape-and-reel packaging (TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT B (1) | Comparator B output | Push-pull TTL/CMOS output; sources 40mA, sinks 0.8mA - directly interfaces with logic inputs or indicator loads. |
| OUT A (2) | Comparator A output | Identical to OUT B; enables independent signal conditioning for dual thresholds or redundancy. |
| V+ (3) | Positive supply rail | Accepts 2V–11V single or +1V–+5.5V dual supply; requires 0.1µF bypass if source impedance >1Ω. |
| IN A– (4) | Inverting input, Comp A | Input common-mode extends to V–; leakage <10pA - minimizes error in high-impedance divider networks. |
| IN A+ (5) | Noninverting input, Comp A | Matches IN A– specs; enables standard inverting/noninverting configurations with matched offset. |
| GND (14) | Output stage ground | Dedicated return for push-pull outputs; connects to system ground in single-supply mode or V– in dual-supply mode. |
| REF (8) | Reference voltage output | 1.182V ±1% w.r.t. V–; drives 0.01µF bypass cap stably - eliminates need for external reference ICs. |
| V– (9) | Negative supply rail | Connect to GND for single supply; or to –1V to –5.5V for dual supply - defines reference and output swing baseline. |
Key Features
| Feature | Design Value |
|---|---|
| No crowbar current during switching | Eliminates supply rail glitches that cause false triggers in adjacent analog or digital circuitry. |
| Integrated 1.182V ±1% reference | Reduces BOM count by one precision voltage reference IC and associated passive components. |
| 40mA output source capability | Drives LEDs, optocouplers, or MCU reset lines directly - avoids external driver transistors or buffers. |
| Input range includes V– | Enables ground-referenced sensing (e.g., battery voltage monitoring) without level-shifting circuitry. |
| Ultralow 8.5µA quiescent current | Supports >10-year operation on CR2032 coin cell in wake-on-threshold applications. |
Applications
| Battery Voltage Monitor | Industrial Threshold Detector |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger low-battery warning or cutoff. IC Role / Device Role / Timing Role: Quad comparator compares cell voltage against 1.182V reference scaled via resistor dividers to detect 2.8V, 3.0V, 3.3V, and 4.2V thresholds. Use Value: Eliminates external reference and reduces PCB area by 30% vs discrete reference + comparator solutions; 8.5µA ICC extends battery life. | Use Scenario: Detecting overvoltage/undervoltage conditions on 24V DC industrial power rails. IC Role / Device Role / Timing Role: LTC1443IS#TRPBF compares rail voltage against scaled reference to assert fault signals to PLC I/O modules. Use Value: Push-pull outputs interface directly with 24V-tolerant optocoupler inputs; wide 2V–11V supply allows self-powering from monitored rail. |
| Low-Power Sensor Interface | Microcontroller Wake-Up Circuit |
Use Scenario: Converting output of high-impedance temperature sensor (e.g., thermistor divider) into digital alert signal. IC Role / Device Role / Timing Role: Comparator A monitors thermistor voltage; REF provides stable bias; GND pin isolates output noise from analog sensor path. Use Value: <10pA input leakage prevents loading of high-Z dividers; 12µs delay ensures timely response to thermal events. | Use Scenario: Waking deep-sleep MCU when external event (e.g., door open, motion) exceeds preset analog threshold. IC Role / Device Role / Timing Role: One comparator output drives MCU interrupt pin; others monitor auxiliary conditions (e.g., tamper, power fail). Use Value: 8.5µA total supply current enables always-on monitoring; push-pull output guarantees clean logic-level assertion without pull-up resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1441IS#TRPBF | Dual comparator (not quad); same 1.182V reference; 5.7µA ICC; 8µs propagation delay. | Requires two devices for quad functionality; better suited for space-constrained dual-threshold designs. | Select when only two comparators needed and lower ICC is critical - saves ~30% quiescent power vs LTC1443IS#TRPBF. |
| LTC1440CS#TRPBF | Single comparator with 1.128V ±1% reference; 5.5µA ICC; 10µs propagation delay. | Not functionally equivalent - lacks quad integration; reference voltage differs by 54mV. | Choose only for single-threshold applications where 1.128V reference matches system design; not a drop-in replacement. |
Compared with LTC1441IS#TRPBF and LTC1440CS#TRPBF, the LTC1443IS#TRPBF uniquely delivers four comparators plus reference in one SO-16 package with 40mA sourcing - making it optimal for multi-level monitoring where board space and component count are constrained.
Availability
LTC1443IS#TRPBF is available at Aetrix Electronics and suitable for battery-powered system monitoring, industrial threshold detection, low-power sensor interfaces, and microcontroller wake-up circuits requiring stable component supply across extended temperature ranges.
Supply support for LTC1443IS#TRPBF 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 its high-performance analog portfolio, emphasizing precision signal conditioning, power management, and sensor interface ICs for industrial, automotive, and medical applications.
The LTC1443IS#TRPBF belongs to Linear's ultralow power comparator family designed specifically for energy-constrained systems requiring integrated reference stability, rail-to-rail input operation, and robust output drive - targeting long-life portable and remote monitoring equipment.
FAQ
What is the reference voltage tolerance of the LTC1443IS#TRPBF over temperature?
The LTC1443IS#TRPBF features a 1.182V internal reference with ±1% initial accuracy at 25°C and ±1.5% maximum deviation over the full –40°C to +85°C industrial temperature range. This specification is verified per the Electrical Characteristics table in the official datasheet, ensuring reliable threshold setting without external calibration.
Can the LTC1443IS#TRPBF operate from a single 3.3V supply?
Yes, the LTC1443IS#TRPBF operates from a single 2V to 11V supply, fully supporting 3.3V systems. At 3.3V, its push-pull outputs deliver VOH ≥ 2.9V and VOL ≤ 0.4V under 0.8mA load, maintaining TTL/CMOS compatibility. The 1.182V reference remains stable, enabling precise ratio-based threshold detection.
Does the LTC1443IS#TRPBF support dual-supply operation?
Yes, the LTC1443IS#TRPBF supports dual-supply operation from ±1V to ±5.5V. In this configuration, V+ connects to +VCC, V– to –VEE, and GND (Pin 14) to system ground - allowing comparator outputs to swing between ground and +VCC while referencing the internal 1.182V bandgap to V–.
What is the maximum capacitive load the REF pin can drive without oscillation?
The REF pin of the LTC1443IS#TRPBF can drive up to 0.01µF (10nF) bypass capacitance without oscillation, as confirmed in the Typical Application section and Absolute Maximum Ratings. For larger capacitors (up to 100µF), a series damping resistor (e.g., 430Ω for 1µF) must be added per Figure 1 in the datasheet.
Is the LTC1443IS#TRPBF pin-compatible with any legacy comparators?
Yes, the LTC1443IS#TRPBF is explicitly documented as a pin-compatible upgrade for the MAX924 quad comparator. Both share identical SO-16 pinouts, push-pull outputs, and reference functionality - enabling drop-in replacement in existing designs without PCB changes, provided supply and reference voltage requirements align.
LTC1443IS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 4
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 2V ~ 11V, ±1V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- 0.015mA @ 5V
- Current - Output (Typ):
- 8.5µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- 50mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 16-SO
LTC1443IS#TRPBF FAQ
1.How can I place an order for LTC1443IS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1443IS#TRPBF 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 LTC1443IS#TRPBF reliable?
The price and inventory of LTC1443IS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1443IS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1443IS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1443IS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1443IS#TRPBF?
LTC1443IS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1443IS#TRPBF 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 LTC1443IS#TRPBF?
For technical support, including LTC1443IS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1443IS#TRPBF requirements.
6.How does Aetrix verify that LTC1443IS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1443IS#TRPBF 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 LTC1443IS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1443IS#TRPBF?
All LTC1443IS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1443IS#TRPBF, 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 LTC1443IS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1443IS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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