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Analog Devices Inc. LTC2966HUD#PBF
- Part No.:
- LTC2966HUD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC2966HUD#PBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,178
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Product details
Overview
LTC2966HUD#PBF from Analog Devices is a micropower dual-channel high-voltage voltage monitor IC designed for system-level power supervision in harsh environments. It supports input monitoring from 3.5V to 100V, delivers ±1.4% max threshold accuracy over temperature, features 100V-rated open-drain outputs with internal 500kΩ pull-up, and operates with only 7µA quiescent current. It is used in automotive battery management, telecom power shelves, and industrial 48V/24V DC systems to generate reliable undervoltage/overvoltage status signals.
For engineers reviewing the LTC2966HUD#PBF datasheet, LTC2966HUD#PBF pinout, LTC2966HUD#PBF application, or LTC2966HUD#PBF equivalent, key selection considerations include its dual independent channel architecture with selectable 5x/10x/20x/40x internal resistive scaling, built-in hysteresis enablement via INH/INL grounding, polarity inversion per channel via PSA/PSB, and guaranteed operation up to 125°C ambient.
Technical Context
The LTC2966HUD#PBF implements two fully independent comparator channels (A and B), each with programmable input scaling using RS1/RS2 pins to select 5×, 10×, 20×, or 40× attenuation of the internal high-impedance resistive divider. Each channel uses separate INHA/INLA and INHB/INLB reference inputs biased from a buffered 2.402V on-chip reference (±0.5% initial tolerance) to set rising and falling thresholds.
Its output stage combines an active low-side MOSFET capable of sinking 5mA with a gated 500kΩ internal pull-up to a regulated internal supply (3.5–5V), enabling direct interfacing to 100V logic rails without external components. UVLO protection activates below 3V on either VINA or VINB, forcing both OUTA and OUTB low regardless of polarity configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 3.5V to 100V on VINA/VINB - enables direct monitoring of 12V, 24V, 48V, and 96V bus systems without external level-shifting. |
| Quiescent Current | 7µA typical - allows continuous supervision in battery-backed or energy-harvesting applications with multi-year runtime. |
| Threshold Accuracy | ±1.4% max over –40°C to +125°C - ensures reliable trip points across automotive and industrial temperature ranges. |
| Output Rating | 100V absolute max on OUTA/OUTB - supports direct connection to high-voltage logic buses or optocoupler inputs without clamping diodes. |
| Propagation Delay | 40–80µs at 10% overdrive - provides deterministic response timing for fault detection in safety-critical power sequencing. |
| Input Leakage | ±0.1nA (H-grade) at INH/INL - minimizes error contribution from external resistor networks used for threshold setting. |
| Reference Voltage | 2.402V ±0.5% (25°C), ±1.5mV/°C drift - serves as stable bias source for precision external dividers or as logic-high for control pins. |
Pinout & Package
Package: 16-Lead (3mm × 3mm) Plastic QFN with exposed pad (UD package); RoHS-compliant, lead-free finish; rated for –40°C to +125°C operating ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Buffered reference output | Provides stable 2.402V reference for biasing INH/INL dividers and logic-level signaling to PS/RS pins. |
| 2 (INHA) | Channel A high-threshold reference input | Scaled by RS1A/RS2A to set VINA rising threshold; ground to enable built-in hysteresis on rising edge. |
| 3 (INLA) | Channel A low-threshold reference input | Scaled by RS1A/RS2A to set VINA falling threshold; ground to enable built-in hysteresis on falling edge. |
| 4 (RS1A) | Channel A range select bit 1 | Logic input (GND/REF) selecting 5x/10x/20x/40x internal divider scaling for Channel A. |
| 5 (GND) | Device ground | Primary return path for internal circuitry and reference; exposed pad may be left floating or tied to GND. |
| 6 (INHB) | Channel B high-threshold reference input | Scaled by RS1B/RS2B to set VINB rising threshold; ground to enable built-in hysteresis on rising edge. |
| 7 (INLB) | Channel B low-threshold reference input | Scaled by RS1B/RS2B to set VINB falling threshold; ground to enable built-in hysteresis on falling edge. |
| 8 (RS1B) | Channel B range select bit 1 | Logic input (GND/REF) selecting 5x/10x/20x/40x internal divider scaling for Channel B. |
| 9 (OUTA) | Channel A status output | Open-drain, 100V-rated output with internal 500kΩ pull-up; polarity controlled by PSA. |
| 10 (VINA) | Channel A high-voltage monitor input | Connects to monitored rail; internal 70MΩ divider draws <7µA at 100V; prioritized for internal supply generation. |
| 11 (VINB) | Channel B high-voltage monitor input | Connects to second monitored rail; shares UVLO with VINA; internal 70MΩ divider draws <7µA at 100V. |
| 12 (OUTB) | Channel B status output | Open-drain, 100V-rated output with internal 500kΩ pull-up; polarity controlled by PSB. |
| 13 (RS2A) | Channel A range select bit 2 | Logic input (GND/REF) completing 2-bit code for 5x/10x/20x/40x scaling on Channel A. |
| 14 (PSA) | Channel A polarity select | Ground = noninverting (OUTA low when VINA falls below INLA); REF = inverting (OUTA low when VINA rises above INHA). |
| 15 (PSB) | Channel B polarity select | Ground = noninverting (OUTB low when VINB falls below INLB); REF = inverting (OUTB low when VINB rises above INHB). |
| 16 (RS2B) | Channel B range select bit 2 | Logic input (GND/REF) completing 2-bit code for 5x/10x/20x/40x scaling on Channel B. |
| 17 (Exposed Pad) | Thermal and electrical ground | Optional PCB GND connection; improves thermal dissipation (θJA = 68°C/W) and reduces noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monitoring channels | Enables simultaneous supervision of primary and backup supplies (e.g., 48V main + 12V aux) or over/under-voltage detection on same rail. |
| Selectable 5×/10×/20×/40× internal scaling | Eliminates need for high-voltage external resistors; supports precise threshold setting from 1.75V to 98V with one external divider network per channel. |
| Built-in hysteresis enablement | Reduces external component count by allowing hysteresis activation via single-pin grounding (INH or INL), delivering fixed 110–880mV VIN-referred hysteresis. |
| 100V-rated open-drain outputs | Permits direct interface to legacy 24V/48V PLC I/O, optocouplers, or microcontroller GPIOs without level translators or protection diodes. |
| –40°C to +125°C operating range | Validated for under-hood automotive, industrial motor drives, and telecom rectifier cabinets where ambient temperatures exceed 100°C. |
| UVLO with priority-based supply selection | Ensures robust startup/shutdown behavior: internal rail derived from higher of VINA/VINB; both outputs forced low if either input drops below 3V. |
Applications
| Automotive Battery Supervision | Telecom Power Shelf Monitoring |
|---|---|
Use Scenario: Continuous monitoring of 12V starter battery and 48V mild-hybrid rail in ADAS ECUs to detect deep discharge or overvoltage faults before system reset. IC Role / Device Role / Timing Role: Dual-channel voltage supervisor generating independent fault flags for battery management MCU; propagation delay <80µs ensures timely intervention during load dump events. Use Value: Eliminates need for two discrete high-voltage comparators and external references, reducing BOM count by ≥6 components while maintaining ±1.4% threshold accuracy at 125°C. | Use Scenario: Real-time supervision of +54V DC output from telecom rectifiers feeding distributed base station equipment, detecting brownouts or surges that could damage RF amplifiers. IC Role / Device Role / Timing Role: High-side voltage monitor interfacing directly to 100V-capable FPGA I/O; OUTA/OUTB wired-OR'd to trigger immediate shutdown upon any rail deviation. Use Value: Internal 500kΩ pull-up and 100V output rating remove external pull-up resistors and TVS diodes, simplifying layout and improving reliability in high-noise telecom environments. |
| Industrial 24V/48V PLC I/O Modules | Portable Medical Equipment Power Sequencing |
Use Scenario: Monitoring field-side 24V DC power in programmable logic controller modules to detect wiring faults, short circuits, or upstream supply failure before actuator misfire. IC Role / Device Role / Timing Role: Dual comparator providing isolated "power good" and "undervoltage lockout" signals to safety controller; RS1/RS2 pins configured for 10x scaling to match 24V nominal. Use Value: 7µA quiescent current extends backup battery life during mains outage; ±1.4% accuracy ensures compliance with IEC 61000-4-29 immunity testing thresholds. | Use Scenario: Supervising lithium-ion pack voltage (3.0–4.2V/cell) and isolated 5V auxiliary rail in portable ultrasound scanners to prevent data corruption during battery swap or low-power mode transitions. IC Role / Device Role / Timing Role: Low-power voltage monitor enabling wake-on-fault capability; INHA/INLA biased from REF to set precise 3.0V undervoltage and 4.2V overvoltage thresholds. Use Value: Micropower operation (7µA) extends standby time between charges; built-in hysteresis eliminates false triggers during transient load steps common in pulsed Doppler imaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel high-voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2965HUD#PBF | Single-channel version; identical 100V rating, 7µA IQ, and 16-QFN package but lacks Channel B and associated pins (INHB, INLB, OUTB, etc.). | Suitable only for single-rail monitoring; cannot replace LTC2966HUD#PBF in dual-supply or over/under-voltage configurations without redesign. | Select when supervising only one critical rail and board space is constrained; requires routing changes and firmware updates to accommodate single-output logic. |
| MAX6805–MAX6809 family | Fixed-threshold, single-channel supervisors (e.g., MAX6806: 3.08V); no internal scaling, no adjustable hysteresis, max 6V supply rating, SOT23-5 package. | Designed for low-voltage microprocessor reset only; cannot monitor >6V rails directly and lacks dual-channel flexibility. | Use only for sub-6V logic supply supervision; not a functional substitute for high-voltage, dual-rail, or programmable-threshold applications requiring LTC2966HUD#PBF. |
Compared with LTC2965HUD#PBF and MAX6806, the LTC2966HUD#PBF uniquely delivers dual independent 100V-monitoring channels with programmable scaling and hysteresis in a thermally enhanced 3×3mm QFN, making it irreplaceable for compact, high-reliability multi-rail supervision where space, voltage range, and configurability are simultaneously constrained.
Availability
LTC2966HUD#PBF is available at Aetrix Electronics and suitable for automotive battery management, telecom power shelf supervision, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges.
Supply support for LTC2966HUD#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2966HUD#PBF belongs to Analog Devices' Linear Technology voltage supervisor product line, engineered specifically for high-voltage, low-power, and high-accuracy power monitoring in mission-critical systems operating beyond 85°C.
FAQ
What is the maximum input voltage the LTC2966HUD#PBF can monitor?
The LTC2966HUD#PBF supports a wide input monitoring range of 1.75V to 98V, enabled by its selectable internal resistive dividers (5x/10x/20x/40x). Its absolute maximum rating for VINA and VINB is 140V, and the device is specified to operate continuously up to 100V. This makes the LTC2966HUD#PBF suitable for monitoring 12V, 24V, 48V, and 96V systems without external components.
How does the built-in hysteresis work on the LTC2966HUD#PBF?
The LTC2966HUD#PBF enables built-in hysteresis by grounding either INHA (for rising-edge hysteresis on Channel A) or INLA (for falling-edge hysteresis on Channel A); similarly for INHB/INLB on Channel B. The hysteresis voltage referred to VIN is fixed per range setting: 110mV (5x), 220mV (10x), 440mV (20x), or 880mV (40x). This eliminates the need for external hysteresis resistors while ensuring stable switching behavior.
Can the LTC2966HUD#PBF drive a 24V logic input directly?
Yes. The LTC2966HUD#PBF features 100V-rated open-drain outputs (OUTA and OUTB) with an internal 500kΩ pull-up to an internally regulated 3.5–5V supply. When externally pulled up to 24V via a resistor, the blocking circuitry prevents back-conduction into the internal supply. This allows direct interfacing with 24V PLC inputs, optocouplers, or industrial GPIOs without level shifters or protection diodes.
What is the operating temperature range of the LTC2966HUD#PBF?
The LTC2966HUD#PBF is rated for operation from –40°C to +125°C ambient temperature. This H-grade qualification makes it suitable for under-hood automotive applications, industrial motor drives, and telecom rectifier cabinets where sustained high-temperature operation is required. Its ±1.4% threshold accuracy is guaranteed across this full range.
How do I configure the LTC2966HUD#PBF for overvoltage detection on a 48V rail?
To configure overvoltage detection on a 48V rail using the LTC2966HUD#PBF, connect the rail to VINA, set RS1A/RS2A to "H/H" for 40x scaling, bias INHA to 1.2V from REF (yielding 48V rising threshold), and ground INLA to enable falling-edge hysteresis. Configure PSA = GND for noninverting output so OUTA goes high only when VINA exceeds 48V. The resulting hysteresis is 880mV (40x × 22mV), giving a clean 47.12V–48V window.
LTC2966HUD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Monitor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LTC2966HUD#PBF FAQ
1.How can I place an order for LTC2966HUD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2966HUD#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 LTC2966HUD#PBF reliable?
The price and inventory of LTC2966HUD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2966HUD#PBF is usually 5 days.
3.What payment methods are accepted for LTC2966HUD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2966HUD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2966HUD#PBF?
LTC2966HUD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2966HUD#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 LTC2966HUD#PBF?
For technical support, including LTC2966HUD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2966HUD#PBF requirements.
6.How does Aetrix verify that LTC2966HUD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2966HUD#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 LTC2966HUD#PBF meets industry standards.
7.What is the process for return or replacement of LTC2966HUD#PBF?
All LTC2966HUD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2966HUD#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 LTC2966HUD#PBF part is unused and in its original packaging.
Return procedure for LTC2966HUD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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