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Analog Devices Inc. LTC2966CSW#PBF
- Part No.:
- LTC2966CSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC2966CSW#PBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:155
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Product details
Overview
LTC2966CSW#PBF from Analog Devices is a micropower dual-channel high-voltage voltage monitor IC designed for system-level power supervision. It monitors two independent input voltages (VINA, VINB) up to 100V with ±1.4% threshold accuracy over temperature, 7µA quiescent current, and 100V-rated open-drain outputs. It enables precise undervoltage/overvoltage detection in telecom power supplies and industrial DC bus monitoring.
For engineers reviewing the LTC2966CSW#PBF datasheet, LTC2966CSW#PBF pinout, LTC2966CSW#PBF application, or LTC2966CSW#PBF equivalent, key selection criteria include its 20-lead SOIC-Wide package, 40x scaling range capability, built-in hysteresis configuration via INH/INL grounding, polarity-selectable outputs, and internal 2.4V reference with 140µVRMS noise.
Technical Context
The LTC2966CSW#PBF integrates two independent high-voltage comparator channels, each with programmable 5x/10x/20x/40x internal resistive dividers and dual reference inputs (INHA/INLA, INHB/INLB) for rising/falling threshold definition. Thresholds are scaled by range-select pins (RS1A/RS2A, RS1B/RS2B) and referenced to an on-chip 2.402V buffered reference.
Each channel features polarity-selectable outputs (via PSA/PSB), 100V-tolerant open-drain outputs with internal 500kΩ pull-up to an internally generated 3.5–5V rail, and configurable built-in hysteresis (14–30mV) activated by grounding INH or INL. Supply current is drawn from the higher of VINA or VINB, with UVLO active below 3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3.5V to 100V on VINA/VINB - supports direct monitoring of 48V telecom, 24V industrial, and 98V battery systems without external level-shifting. |
| Quiescent Current | 7µA typical - enables multi-year battery life in portable and remote sensor applications. |
| Threshold Accuracy | ±1.4% max over –40°C to 125°C - ensures reliable trip points across automotive and industrial ambient conditions. |
| Reference Voltage | 2.402V ±12mV - provides stable low-noise (140µVRMS) bias for external resistor networks setting INH/INL thresholds. |
| Output Rating | 100V absolute max on OUTA/OUTB - allows direct connection to high-side rails up to 98V with no external protection required. |
| Propagation Delay | 40–80µs at 10% overdrive - supports fast fault response in hot-swap and power sequencing circuits. |
| Input Leakage | ±0.1nA max on INH/INL - minimizes error in high-impedance threshold dividers using >1MΩ resistors. |
Pinout & Package
Package: 20-Lead Plastic Small Outline (Wide, 0.300 inch), RoHS-compliant, operating temperature range 0°C to 70°C (C-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA | Channel A high-voltage monitor input | Internally connected to 70MΩ resistive divider; supplies internal bias rail when ≥ VINB; must exceed 3.5V for full functionality. |
| NC | No-connect | Pins 2, 4, 12, 14 are unconnected - must be left floating or tied to GND per layout guidelines. |
| OUTA | Channel A status output | Open-drain, 100V-rated; includes internal 500kΩ pull-up to internal 3.5–5V rail; polarity controlled by PSA. |
| REF | 2.402V buffered reference output | Supplies precision bias for external INH/INL resistor networks; max load 100µA; bypass with ≤1nF capacitor. |
| INHA / INLA | Channel A comparator reference inputs | Set rising/falling thresholds via external resistive divider; valid common-mode range 0.35–2.45V; grounding either enables built-in hysteresis. |
| RS1A / RS2A | Channel A range select inputs | Binary-coded pins (L/L = 5x, H/L = 10x, L/H = 20x, H/H = 40x) configuring internal divider attenuation for VINA monitoring. |
| PSA | Channel A polarity select | Connect to REF (>1.4V) for inverting output (OUTA low on overvoltage); connect to GND for noninverting (OUTA low on undervoltage). |
| VINB | Channel B high-voltage monitor input | Secondary monitor input; lower priority than VINA for internal supply generation; supports independent 48V/24V monitoring. |
| GND | Device ground | Primary return path; exposed pad (not present in SW package) is optional in QFN variant only. |
| INHB / INLB | Channel B comparator reference inputs | Functionally identical to INHA/INLA; used to configure independent thresholds for VINB. |
| RS1B / RS2B | Channel B range select inputs | Independent binary control for VINB's internal divider scaling (5x/10x/20x/40x). |
| PSB | Channel B polarity select | Same logic as PSA; enables independent output polarity for Channel B. |
| OUTB | Channel B status output | Functionally identical to OUTA; supports wire-OR with OUTA for combined fault signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-voltage monitoring | Simultaneous supervision of two separate DC rails (e.g., 48V primary + 24V backup) with no shared reference dependency. |
| Programmable 40x scaling range | Enables accurate 14–98V monitoring using low-value, high-precision resistors at INH/INL - reduces sensitivity to leakage and noise. |
| Built-in hysteresis activation | Grounding INH or INL selects fixed hysteresis (14–30mV referred to VIN) without external components - simplifies undervoltage lockout design. |
| 100V-rated open-drain outputs | Eliminates need for external level-shifters or MOSFET drivers when interfacing with microcontrollers or FPGAs powered from lower rails. |
| Internal 2.402V reference with low noise | 140µVRMS broadband noise and ±12mV tolerance enable <±0.5% threshold error when paired with 0.1% external resistors. |
Applications
| Telecom Power Supervision | Industrial DC Bus Monitoring |
|---|---|
Use Scenario: Continuous monitoring of –48V telecom distribution systems for brownout and overvoltage events. IC Role / Device Role / Timing Role: Dual-channel voltage supervisor detecting both undervoltage (<–42V) and overvoltage (>–56V) on primary and backup feeds. Use Value: Enables failover switching within 80µs propagation delay while drawing only 7µA - critical for energy-efficient central office equipment. | Use Scenario: Real-time supervision of 24V/48V PLC I/O module power rails in factory automation. IC Role / Device Role / Timing Role: Independent channel A (48V bus) and channel B (24V logic rail) monitoring with separate hysteresis and polarity settings. Use Value: Prevents spurious resets during motor startup transients via configurable 20x scaling and built-in hysteresis - improves system uptime. |
| Automotive Battery Management | Hot-Swap Controller Interface |
Use Scenario: Monitoring 12V/24V vehicle battery voltage during cold-cranking and alternator regulation. IC Role / Device Role / Timing Role: Undervoltage lockout (UVLO) with 3.5V minimum operating voltage and 70mV hysteresis to reject cranking dips. Use Value: Guarantees clean reset assertion down to 1.25V input - prevents MCU latch-up during deep discharge conditions. | Use Scenario: Fault signaling interface between hot-swap controller and system management unit in server backplanes. IC Role / Device Role / Timing Role: High-side status translator converting 12V/48V hot-swap fault signals to 3.3V-compatible open-drain outputs. Use Value: 100V output rating withstands 140V ABSOLUTE MAX transients - eliminates external TVS diodes and saves board space. |
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 |
|---|---|---|---|
| LTC2965CSW#PBF | Single-channel version; identical pinout except missing INHB/INLB, RS1B/RS2B, PSB, OUTB, VINB - occupies same 20-lead SOIC footprint. | Used where only one high-voltage rail requires supervision; not suitable for dual-rail or redundancy monitoring. | Select LTC2965CSW#PBF when cost-sensitive single-rail monitoring is sufficient and PCB layout reuse is prioritized. |
| MAX6326–MAX6328 series | Fixed-threshold (no INH/INL configuration); 3-pin SOT23 packages; no internal reference; 5.5V max supply; 6V max input. | Limited to low-voltage (≤5.5V) systems; lacks programmability, hysteresis control, and high-voltage capability. | Choose MAX6326–MAX6328 only for simple, low-cost 3.3V/5V supply monitoring - not a functional substitute for LTC2966CSW#PBF's 100V operation. |
Compared with LTC2965CSW#PBF and MAX6326–MAX6328, the LTC2966CSW#PBF uniquely delivers dual independent 100V monitoring with user-configurable thresholds, built-in hysteresis, and an integrated reference - enabling compact, high-accuracy supervision of telecom, industrial, and automotive DC systems without external support components.
Availability
LTC2966CSW#PBF is available at Aetrix Electronics and suitable for telecom power systems, industrial PLCs, and automotive battery management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC2966CSW#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 LTC2966CSW#PBF belongs to Analog Devices' Linear Technology voltage supervisor product line, engineered for ultra-low-power, high-voltage system monitoring in harsh environments where reliability and precision are critical.
FAQ
What is the maximum input voltage the LTC2966CSW#PBF can monitor?
The LTC2966CSW#PBF supports a maximum input voltage of 100V on VINA and VINB, with absolute maximum ratings extending to 140V. Its internal 70MΩ resistive dividers and high-voltage comparator architecture enable direct monitoring of 48V telecom, 24V industrial, and 98V battery systems without external attenuation. Operation above 100V violates recommended conditions and risks permanent damage.
How does the LTC2966CSW#PBF achieve ±1.4% threshold accuracy over temperature?
The LTC2966CSW#PBF achieves ±1.4% threshold accuracy over –40°C to 125°C through trimmed internal resistive dividers (±0.4% range error), low-offset comparators (±3mV), a tightly regulated 2.402V reference (±12mV), and matched temperature coefficients across its sensing and reference paths. This specification is guaranteed in production testing and applies to all four scaling ranges (5x–40x) under specified load and layout conditions.
Can the LTC2966CSW#PBF monitor two different voltage rails simultaneously?
Yes, the LTC2966CSW#PBF independently monitors VINA and VINB with fully separate configurations: distinct range select (RS1A/RS2A, RS1B/RS2B), polarity select (PSA, PSB), and reference inputs (INHA/INLA, INHB/INLB). This allows simultaneous supervision of, for example, a 48V primary rail and a 24V backup rail - each with unique thresholds, hysteresis, and output logic polarity.
What is the purpose of the REF pin on the LTC2966CSW#PBF?
The REF pin on the LTC2966CSW#PBF provides a buffered 2.402V ±12mV reference output with 140µVRMS noise, used to bias external resistor networks that set INH/INL threshold voltages. It also serves as a logic-high source for RS and PS pins. Loading beyond 100µA degrades accuracy; bypassing with ≤1nF to GND is recommended to maintain stability and noise performance.
Does the LTC2966CSW#PBF require external components to implement hysteresis?
No - the LTC2966CSW#PBF includes selectable built-in hysteresis (14–30mV referred to VIN) activated by grounding either INH (rising-edge hysteresis) or INL (falling-edge hysteresis). This eliminates external hysteresis resistors in basic undervoltage/overvoltage detection. For larger hysteresis, external resistor networks remain supported via the standard INH/INL configuration method.
LTC2966CSW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
LTC2966CSW#PBF FAQ
1.How can I place an order for LTC2966CSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2966CSW#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 LTC2966CSW#PBF reliable?
The price and inventory of LTC2966CSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2966CSW#PBF is usually 5 days.
3.What payment methods are accepted for LTC2966CSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2966CSW#PBF transactions.
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4.How is shipping managed for LTC2966CSW#PBF?
LTC2966CSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2966CSW#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 LTC2966CSW#PBF?
For technical support, including LTC2966CSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2966CSW#PBF requirements.
6.How does Aetrix verify that LTC2966CSW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2966CSW#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 LTC2966CSW#PBF meets industry standards.
7.What is the process for return or replacement of LTC2966CSW#PBF?
All LTC2966CSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2966CSW#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 LTC2966CSW#PBF part is unused and in its original packaging.
Return procedure for LTC2966CSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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