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Analog Devices Inc. LTC1443CS#TRPBF
- Part No.:
- LTC1443CS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1443CS#TRPBF.pdf
- Description:
- IC COMPARATOR 4 W/VOLT REF 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,626
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Product details
Overview
LTC1443CS#TRPBF from Analog Devices (formerly Linear Technology) is an ultralow power quad comparator IC 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 - enabling battery-powered voltage monitoring and threshold detection in space-constrained industrial sensors.
For engineers reviewing the LTC1443CS#TRPBF datasheet, LTC1443CS#TRPBF pinout, LTC1443CS#TRPBF application, or LTC1443CS#TRPBF equivalent, key selection criteria include its guaranteed 1.182V reference accuracy over –40°C to +85°C, absence of crowbar current during output transitions, and compatibility with 0.01µF reference bypass capacitance without oscillation - critical for low-noise, glitch-immune comparator designs.
Technical Context
The LTC1443CS#TRPBF integrates four independent comparators sharing a single bandgap reference referenced to V–, with each comparator's inputs operating rail-to-rail down to the negative supply and within 1.3V of V+. Its output stage uses complementary CMOS drivers (not open-drain), enabling true sourcing and sinking capability while eliminating cross-conducting current during logic transitions.
Pin 14 functions as GND (not HYST), distinguishing it from LTC1444/LTC1445 variants; this enables split-supply operation with separate ground for the output stage. The reference output drives up to 200µA source / 15µA sink load while maintaining ±1% initial accuracy and <100µVRMS noise (100Hz–100kHz), supporting stable biasing in high-impedance sensing networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | ≤8.5µA max over full temperature range - enables multi-year operation on coin-cell batteries. |
| Reference Voltage | 1.182V ±1% (C-temp), ±1.5% (I-temp) - provides stable, factory-trimmed threshold without external components. |
| Input Offset Voltage | ±10mV max - ensures reliable detection of small differential signals above noise floor. |
| Propagation Delay | 14µs typical (10mV overdrive, 100pF load) - balances speed and ultralow power for slow-varying DC monitoring. |
| Output Drive | 40mA continuous source, 5mA sink - directly interfaces with LEDs, logic inputs, or small relays without external buffers. |
| Input Common-Mode Range | V– to V+–1.3V - supports direct sensing of signals near ground or supply rails in single-supply systems. |
| Reference Load Capability | Drives 0.01µF capacitor without oscillation - simplifies noise filtering without stability analysis. |
Pinout & Package
Package: 16-pin SO (Small Outline, 150 mil width), RoHS-compliant, lead-free finish, tape-and-reel packaging (TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 15, 16 | OUT B, OUT A, OUT D, OUT C | CMOS push-pull outputs - each sources up to 40mA and sinks 5mA; compatible with TTL/CMOS logic families. |
| 3 | V+ | Positive supply input - accepts 2V–11V single or ±1V–±5.5V dual supply configurations. |
| 4, 5, 6, 7, 10, 11, 12, 13 | IN A–, IN A+, IN B–, IN B+, IN C–, IN C+, IN D–, IN D+ | Differential comparator inputs - rail-to-rail capable down to V–, with ±10pA typical leakage at 25°C. |
| 8 | REF | 1.182V reference output - referenced to V–, drives 0.01µF bypass cap stably, sources 200µA max. |
| 9 | V– | Negative supply input - tied to GND for single-supply use; internally connected to exposed pad in DFN variant. |
| 14 | GND | Ground for comparator output stage - distinct from V– in split-supply mode; not HYST (unlike LTC1444/1445). |
Key Features
| Feature | Design Value |
|---|---|
| No crowbar current | Eliminates supply glitches during output transitions - critical for mixed-signal systems sharing noisy rails. |
| Ultralow quiescent current | ≤8.5µA over temperature - enables always-on monitoring in energy-harvesting and portable medical devices. |
| Integrated precision reference | 1.182V ±1% (0°C–70°C), ±1.5% (–40°C–85°C) - removes need for external voltage reference IC or resistor divider. |
| Wide supply range | Single: 2V–11V; Dual: ±1V–±5.5V - supports operation from single Li-ion cell (2.7V–4.2V) up to 9V battery stacks. |
| Input voltage range includes V– | Inputs operate down to V– - allows direct ground-referenced signal comparison without level-shifting circuitry. |
Applications
| Battery Voltage Monitor | Industrial Threshold Detector |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in handheld instruments. IC Role / Device Role / Timing Role: Quad comparator compares cell voltage against 1.182V reference scaled by precision resistors to detect under-voltage (2.8V) and over-voltage (4.3V) thresholds. Use Value: Eliminates external reference and reduces BOM count by 3 components; 8.5µA quiescent current extends standby time beyond 10 years on CR2032. |
Use Scenario: Detecting out-of-tolerance analog sensor outputs (e.g., 4–20mA loop current) in PLC I/O modules. IC Role / Device Role / Timing Role: One comparator channel monitors loop current via shunt resistor; REF pin provides stable 1.182V reference for accurate 4mA/20mA trip points. Use Value: Input common-mode range extending to V– enables direct sensing of grounded-loop signals; no level-shifter required. |
| Glitch-Immune Power Sequencing | Low-Power Window Comparator |
|
Use Scenario: Validating correct power-up sequence of multiple rails (e.g., 3.3V before 1.2V) in FPGA-based embedded systems. IC Role / Device Role / Timing Role: Two comparators monitor each rail against REF-derived thresholds; open-collector OR-ing of outputs generates global "POWER_OK" signal. Use Value: Absence of crowbar current prevents false resets caused by supply coupling during rail transitions. |
Use Scenario: Detecting valid temperature sensor output (e.g., thermistor voltage) within safe operating window in HVAC controllers. IC Role / Device Role / Timing Role: Two comparators form window detector: one checks upper limit (REF × R1/R2), another lower limit (REF × R3/R4); third comparator debounces output. Use Value: Integrated REF eliminates drift between upper/lower thresholds; 100µVRMS noise ensures clean decision boundaries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad micropower comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1441IS#TRPBF | Dual comparator (not quad); same 1.182V reference, 5.7µA supply current, 8µs propagation delay. | Requires two devices to match LTC1443CS#TRPBF channel count; better suited for space-constrained dual-threshold designs. | Select when only two comparator channels are needed and lowest possible supply current (5.7µA vs 8.5µA) is prioritized. |
| LTC1440CS#TRPBF | Single comparator with 1.128V ±1% reference; 5.5µA supply current; no programmable hysteresis. | Not functionally equivalent due to single-channel architecture and different reference voltage - requires redesign for quad functionality. | Choose only for new single-channel designs where 1.128V threshold is acceptable and ultra-low 5.5µA current is mandatory. |
Compared with LTC1443CS#TRPBF, LTC1441IS#TRPBF offers lower quiescent current but halves channel count, while LTC1440CS#TRPBF provides the lowest current but lacks both channel count and reference voltage match - making LTC1443CS#TRPBF the only drop-in solution for existing quad-comparator layouts requiring 1.182V reference stability.
Availability
LTC1443CS#TRPBF is available at Aetrix Electronics and suitable for battery-powered system monitoring, threshold detectors, and window comparators requiring stable component supply across commercial and industrial temperature ranges.
Supply support for LTC1443CS#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, inheriting its legacy of precision analog ICs for demanding industrial, automotive, and instrumentation applications.
The LTC1443CS#TRPBF belongs to Linear's ultralow power comparator family designed specifically for long-life, battery-operated systems where supply current, reference accuracy, and output drive capability must coexist without compromise.
FAQ
What is the reference voltage tolerance of the LTC1443CS#TRPBF over temperature?
The LTC1443CS#TRPBF features a 1.182V internal reference with ±1% initial accuracy over 0°C to 70°C (commercial grade), and ±1.5% over –40°C to +85°C (industrial grade). This specification is guaranteed in the datasheet and applies to the LTC1443CS#TRPBF variant specifically - unlike LTC1444/LTC1445 which use 1.221V.
Can the LTC1443CS#TRPBF operate from a single 3.3V supply?
Yes, the LTC1443CS#TRPBF supports single-supply operation from 2V to 11V. At 3.3V, it maintains ≤8.5µA supply current, 1.182V reference accuracy, and full input common-mode range from GND to 2.0V (V+–1.3V), making it ideal for 3.3V microcontroller peripheral monitoring.
Does the LTC1443CS#TRPBF have programmable hysteresis?
No, the LTC1443CS#TRPBF does not support programmable hysteresis. Pin 14 is GND, not HYST - hysteresis capability is exclusive to LTC1444 and LTC1445 variants. For hysteresis requirements, LTC1444CS#TRPBF or LTC1445CS#TRPBF must be selected instead.
What is the maximum capacitive load the REF pin of the LTC1443CS#TRPBF can drive?
The REF pin of the LTC1443CS#TRPBF can drive up to 0.01µF (10nF) bypass capacitance without oscillation. Larger values require series damping resistance (e.g., 430Ω for 1µF), as detailed in Figure 1 of the datasheet - a design constraint specific to the LTC1443CS#TRPBF's internal reference buffer.
Is the LTC1443CS#TRPBF pin-compatible with MAX924?
Yes, the LTC1443CS#TRPBF is explicitly documented as a pin-compatible upgrade for MAX924 in the datasheet Features section. Both use identical 16-pin SO packaging, matching pin functions including GND at Pin 14 and REF at Pin 8 - enabling direct replacement without PCB modification.
LTC1443CS#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):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 16-SO
LTC1443CS#TRPBF FAQ
1.How can I place an order for LTC1443CS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1443CS#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 LTC1443CS#TRPBF reliable?
The price and inventory of LTC1443CS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1443CS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1443CS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1443CS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1443CS#TRPBF?
LTC1443CS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1443CS#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 LTC1443CS#TRPBF?
For technical support, including LTC1443CS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1443CS#TRPBF requirements.
6.How does Aetrix verify that LTC1443CS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1443CS#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 LTC1443CS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1443CS#TRPBF?
All LTC1443CS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1443CS#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 LTC1443CS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1443CS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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