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Analog Devices Inc. LTC1443CDHD#TRPBF
- Part No.:
- LTC1443CDHD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC1443CDHD#TRPBF.pdf
- Description:
- IC COMPARATOR 4 W/VOLT REF 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
LTC1443CDHD#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 2V to 11V single supply or ±1V to ±5.5V dual supply. It delivers ≤8.5µA quiescent current over temperature, supports 40mA continuous output source capability, and enables battery-powered threshold detection without external reference components.
For engineers reviewing the LTC1443CDHD#TRPBF datasheet, LTC1443CDHD#TRPBF pinout, LTC1443CDHD#TRPBF application, or LTC1443CDHD#TRPBF equivalent, key selection criteria include its micropower consumption, built-in reference accuracy, rail-to-rail input range (V– to V+ – 1.3V), 12µs typical propagation delay at 10mV overdrive, and DFN-16 (5mm × 4mm) package for space-constrained monitoring systems.
Technical Context
The LTC1443CDHD#TRPBF integrates four independent comparators sharing a single internal bandgap reference referenced to V–. Its input stage operates with ±10pA typical leakage and common-mode range extending from V– to within 1.3V of V+, enabling direct sensing near ground in single-supply configurations. The output stage eliminates crowbar current during switching, preventing supply glitches.
This device uses a dedicated GND pin (Pin 14) - distinct from V– - to isolate the output stage ground, supporting true split-supply operation (±1V to ±5.5V) while maintaining TTL compatibility. The reference output drives up to 0.01µF bypass capacitance without oscillation and provides 1.182V ±1.5% over –40°C to 85°C.
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) - eliminates need for external voltage reference IC or resistor divider |
| Input Common-Mode Range | V– to V+ – 1.3V - supports direct ground-referenced sensing in 3.3V/5V systems |
| Propagation Delay | 12µs typ at 10mV overdrive, COUT = 100pF - suitable for slow-varying DC thresholds, not high-speed signal comparison |
| Output Drive | 40mA continuous source, 5mA sink - directly drives LEDs, small relays, or logic inputs without buffer transistors |
| Supply Range | Single: 2V to 11V; Dual: ±1V to ±5.5V - compatible with Li-ion, alkaline, and industrial DC rails |
| Input Offset Voltage | ±10mV max - sets minimum detectable differential voltage across inputs |
Pinout & Package
Package: 16-lead plastic DFN (5mm × 4mm × 0.8mm), exposed pad internally connected to V–. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT B (1) | Comparator B output | Push-pull TTL/CMOS output; sources up to 40mA, sinks 5mA; connects to load or logic input |
| OUT A (2) | Comparator A output | Identical drive capability to OUT B; independent control of two thresholds |
| V+ (3) | Positive supply rail | Accepts 2V–11V single or +1V–+5.5V dual; requires 0.1µF local bypass if source impedance >1Ω |
| IN A– (4) | Inverting input A | High-impedance node (±10pA leakage); common-mode range includes V– |
| IN A+ (5) | Noninverting input A | Same specs as IN A–; used with resistive dividers for precise trip-point setting |
| REF (8) | Reference output | 1.182V ±1% referenced to V–; drives 0.01µF capacitor directly; max 200µA source / 15µA sink |
| GND (14) | Output stage ground | Dedicated ground for comparator outputs; connect to system GND in single-supply mode |
| V– (9) | Negative supply rail | Connect to GND for single supply; use as negative rail for dual supply (±1V to ±5.5V) |
| Exposed Pad (17) | Thermal connection | Internally tied to V–; soldering improves thermal dissipation but is optional |
Key Features
| Feature | Design Value |
|---|---|
| No crowbar current during output transitions | Eliminates supply rail glitches that could falsely trigger other circuitry in shared power domains |
| Reference drives 0.01µF capacitor without oscillation | Enables stable local decoupling without external RC damping network or layout sensitivity | 40mA continuous output source current | Directly interfaces with status LEDs, optocouplers, or low-power logic families without external drivers |
| Input common-mode range includes V– | Allows direct connection of sensor outputs (e.g., thermistor dividers) to ground-referenced inputs |
| 12µs propagation delay at 10mV overdrive | Optimized for DC and low-frequency monitoring (e.g., battery voltage, temperature thresholds), not RF or fast edges |
Applications
| Battery Voltage Monitor | Industrial Power Supply Sequencing |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles to trigger low-battery shutdown or charging state transitions. IC Role / Device Role / Timing Role: Quad comparator compares divided cell voltage against multiple thresholds (e.g., 4.2V full, 3.6V nominal, 3.0V critical) using internal reference. Use Value: Eliminates external reference and reduces BOM count by 3–4 components per monitored rail while maintaining ±1% trip accuracy over temperature. | Use Scenario: Validating correct power-up order of +12V, +5V, and +3.3V rails in programmable logic controllers before enabling FPGA configuration. IC Role / Device Role / Timing Role: Each comparator independently verifies individual rail presence using resistor-divided inputs and shared REF. Use Value: Single-chip solution replaces discrete op-amp + reference designs, reducing PCB area by >60% and improving long-term drift stability. |
| Portable Medical Sensor Interface | Smart Energy Meter Threshold Detection |
Use Scenario: Detecting out-of-range ECG electrode contact impedance or pulse oximeter LED driver current faults in handheld diagnostic devices. IC Role / Device Role / Timing Role: Two comparators monitor analog front-end bias currents; remaining two validate reference stability and supply integrity. Use Value: 8.5µA total supply current extends AA battery life beyond 5 years in standby, meeting IEC 62304 Class B requirements. | Use Scenario: Identifying voltage sags, swells, and neutral-ground faults in residential smart meters using AC-derived DC monitoring rails. IC Role / Device Role / Timing Role: Configured as window comparator (two comparators) plus undervoltage/overvoltage detectors (two comparators) on rectified mains-derived supply. Use Value: Integrated 1.182V reference ensures consistent trip points across meter production batches, eliminating calibration steps during manufacturing. |
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 |
|---|---|---|---|
| LTC1443CS#TRPBF | 16-lead SOIC package (5.3mm × 10.2mm); same electrical specs and pinout | Preferred for through-hole prototyping, manual rework, or legacy board compatibility | Select when DFN assembly infrastructure is unavailable or thermal mass requirements exceed DFN capability |
| LTC1441IS#TRPBF | Dual comparator (not quad); 1.182V reference; 5.7µA supply current; SOIC-8 package | Requires two devices to match channel count; lower power but higher component count | Choose when only two thresholds needed and ultra-low 5.7µA ICC justifies doubling footprint and assembly cost |
Compared with LTC1443CS#TRPBF, the LTC1443CDHD#TRPBF saves >70% board area and improves thermal resistance (θJA = 41.7°C/W vs 150°C/W), while LTC1441IS#TRPBF trades integration for lower quiescent current but doubles assembly complexity for quad functionality.
Availability
LTC1443CDHD#TRPBF is available at Aetrix Electronics and suitable for battery-powered system monitoring, threshold detectors, window comparators, and oscillator circuits requiring stable component supply across commercial temperature range (0°C to 70°C).
Supply support for LTC1443CDHD#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 full product support, datasheet documentation, and long-term supply commitment for legacy Linear parts.
The LTC1443 series belongs to Linear's ultralow power analog portfolio, designed specifically for energy-constrained applications including portable instrumentation, remote sensors, and always-on supervisory circuits where µA-level supply current and integrated precision references are mandatory.
FAQ
What is the operating temperature range for the LTC1443CDHD#TRPBF?
The LTC1443CDHD#TRPBF is specified for the commercial temperature range of 0°C to 70°C. This is confirmed by the "C" grade designation in the part number and the Order Information table, which lists "0°C to 70°C" for all LTC1443CDHD variants. Industrial-grade versions (LTC1443IDHD#TRPBF) extend to –40°C to 85°C.
Does the LTC1443CDHD#TRPBF require external hysteresis components?
No, the LTC1443CDHD#TRPBF does not support programmable hysteresis. Unlike the LTC1444/LTC1445 variants, the LTC1443 uses Pin 14 as GND (not HYST) and lacks hysteresis control circuitry. Hysteresis must be implemented externally via positive feedback resistors if noise immunity is required in the application.
Can the LTC1443CDHD#TRPBF operate from a single 3.3V supply?
Yes, the LTC1443CDHD#TRPBF fully supports single-supply operation from 3.3V. Its supply range is 2V to 11V, and its inputs operate from V– (GND) to V+ – 1.3V (2.0V at 3.3V), allowing direct interface with 3.3V microcontroller ADC references or sensor outputs. The 1.182V reference remains accurate and stable at this rail.
What is the maximum capacitive load the REF pin can drive on the LTC1443CDHD#TRPBF?
The REF pin of the LTC1443CDHD#TRPBF can drive up to 0.01µF (10nF) bypass capacitance without oscillation, as explicitly stated in the datasheet Features section and Applications Information. Larger capacitors require external series damping resistors - Figure 2 in the datasheet provides resistor values for 0.1µF to 100µF.
Is the LTC1443CDHD#TRPBF pin-compatible with MAX924?
Yes, the LTC1443CDHD#TRPBF is a pin-compatible upgrade for MAX924, as confirmed in the datasheet Features list ("Pin Compatible Upgrades for MAX924"). Both devices share identical pin functions, supply ranges, and output drive characteristics in the 16-pin DFN package, enabling drop-in replacement without PCB modification.
LTC1443CDHD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-WFDFN Exposed Pad
- 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-DFN (5x4)
LTC1443CDHD#TRPBF FAQ
1.How can I place an order for LTC1443CDHD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1443CDHD#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 LTC1443CDHD#TRPBF reliable?
The price and inventory of LTC1443CDHD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1443CDHD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1443CDHD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1443CDHD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1443CDHD#TRPBF?
LTC1443CDHD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1443CDHD#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 LTC1443CDHD#TRPBF?
For technical support, including LTC1443CDHD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1443CDHD#TRPBF requirements.
6.How does Aetrix verify that LTC1443CDHD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1443CDHD#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 LTC1443CDHD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1443CDHD#TRPBF?
All LTC1443CDHD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1443CDHD#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 LTC1443CDHD#TRPBF part is unused and in its original packaging.
Return procedure for LTC1443CDHD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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