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Analog Devices Inc. LTC2966IUD#PBF
- Part No.:
- LTC2966IUD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC2966IUD#PBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,519
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Product details
Overview
LTC2966IUD#PBF from Analog Devices is a micropower dual-channel high-voltage voltage monitor IC designed for system-level power supervision in 12V–48V–96V industrial and automotive rails. It features two independent 100V-rated monitoring channels, ±1.4% threshold accuracy over temperature, 7µA quiescent current, and configurable 5x/10x/20x/40x internal resistive dividers - enabling precise undervoltage/overvoltage detection in telecom power supplies and battery management systems.
For engineers reviewing the LTC2966IUD#PBF datasheet, LTC2966IUD#PBF pinout, LTC2966IUD#PBF application, or LTC2966IUD#PBF equivalent, key selection considerations include its 16-lead 3mm × 3mm QFN package with exposed pad, –40°C to +85°C industrial temperature grade, dual-channel hysteresis configuration via INH/INL grounding, and 100V output capability with internal 500kΩ pull-up.
Technical Context
The LTC2966IUD#PBF implements two independent comparator-based monitoring channels, each with programmable attenuation (5x–40x) via RS1/RS2 pins and polarity inversion via PSA/PSB. Thresholds are set by external resistive dividers referenced to the 2.402V on-chip REF, with VIN(RISE) = RANGE × INH and VIN(FALL) = RANGE × INL.
Each channel includes built-in hysteresis (14–30mV at input, scaled per range), UVLO protection (3V threshold), and high-voltage outputs capable of sinking 5mA while being pulled up to 100V externally. Supply current is drawn from the higher of VINA or VINB, with priority given to VINA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3.5V to 100V on VINA/VINB - supports direct monitoring of 48V telecom, 60V EV auxiliary, and 96V industrial bus rails without external level-shifting. |
| Quiescent Current | 7µA typical - enables always-on supervision in battery-backed systems with multi-year runtime. |
| Threshold Accuracy | ±1.4% max over –40°C to +85°C - ensures reliable trip points across full industrial temperature range without calibration. |
| Input Monitor Range | 1.75V to 98V (configurable per channel) - covers common supply thresholds: 3.3V logic, 5V USB, 12V automotive, 24V PLC, 48V PoE++, and 96V DC-link. |
| Output Rating | 100V tolerant, active pull-down + 500kΩ internal pull-up - allows direct interface to high-side MOSFET gates or optocouplers without external drivers. |
| Propagation Delay | 40–80µs (10x range, 10% overdrive) - provides deterministic response for fast fault isolation in safety-critical power systems. |
| Reference Voltage | 2.402V ±12mV (–40°C to +85°C) - stable low-drift reference for accurate external resistor-based threshold setting. |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic QFN with exposed pad (UD package); RoHS-compliant lead-free finish; thermal resistance θJA = 68°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | On-chip reference output | 2.402V buffered reference used to bias external INH/INL dividers; max 100µA load; requires ≤1nF bypass. |
| 2 (INHA) | Channel A high-threshold reference input | Scaled by RS1A/RS2A to set rising-edge trip point on VINA; grounded to enable built-in hysteresis on rising edge. |
| 3 (INLA) | Channel A low-threshold reference input | Scaled by RS1A/RS2A to set falling-edge trip point on VINA; grounded 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 attenuation; paired with RS2A per Table 1 in datasheet. |
| 5 (GND) | Device ground | Analog and digital reference node; exposed pad may be left floating or connected to PCB GND for thermal relief. |
| 6 (INHB) | Channel B high-threshold reference input | Functionally identical to INHA but for VINB; enables independent dual-rail monitoring (e.g., main + backup supply). |
| 7 (INLB) | Channel B low-threshold reference input | Functionally identical to INLA but for VINB; supports asymmetric hysteresis per channel. |
| 8 (RS1B) | Channel B range select bit 1 | Independent range control for Channel B; allows different scaling on VINA vs VINB (e.g., 10x on 24V, 40x on 96V). |
| 9 (OUTA) | Channel A status output | Open-drain compatible, 100V-rated output with internal 500kΩ pull-up to ~3.5–5V rail; polarity controlled by PSA. |
| 10 (VINA) | Channel A high-voltage monitor input | Internally connected to 70MΩ resistive divider; draws only 7µA at 100V - eliminates need for external HV divider network. |
| 11 (VINB) | Channel B high-voltage monitor input | Same architecture as VINA; prioritized lower for internal supply generation if both inputs active. |
| 12 (OUTB) | Channel B status output | Electrically identical to OUTA; supports wire-OR connection for combined fault signaling. |
| 13 (RS2A) | Channel A range select bit 2 | Completes 2-bit range code with RS1A (LL=5x, HL=20x, LH=10x, HH=40x). |
| 14 (PSA) | Channel A polarity select | Ground = noninverting (OUTA low when VINA < threshold); REF = inverting (OUTA low when VINA > threshold). |
| 15 (PSB) | Channel B polarity select | Same function as PSA, independent control for VINB monitoring logic. |
| 16 (RS2B) | Channel B range select bit 2 | Completes 2-bit range code for Channel B, independent of Channel A settings. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 100V monitor channels | Enables simultaneous supervision of primary and backup supplies (e.g., 48V main + 12V control rail) with no shared timing or accuracy coupling. |
| Configurable 5x/10x/20x/40x internal attenuation | Eliminates external HV resistors - reduces board space, leakage error, and thermal drift in precision threshold applications. |
| Built-in hysteresis (14–30mV, range-scaled) | Prevents chatter during slow-rising/falling transients without requiring external RC networks or comparator feedback. |
| 2.402V ±12mV reference with 140µVRMS noise | Supports <±0.5% total threshold error with 1% external resistors - critical for ASIL-B functional safety compliance. |
| 100V-rated outputs with internal 500kΩ pull-up | Directly drives optocoupler LEDs, MOSFET gates, or microcontroller GPIOs without level shifters or external pull-ups. |
| –40°C to +85°C operating range (I-grade) | Validated for use in under-hood automotive modules, industrial PLCs, and outdoor telecom cabinets without derating. |
Applications
| Telecom Power Supervision | Automotive Battery Management |
|---|---|
|
Use Scenario: Monitoring –48V DC telecom plant battery backup and rectifier output rails. IC Role / Device Role / Timing Role: Dual-channel undervoltage lockout supervisor detecting failure of primary rectifier and secondary battery discharge below 42V. Use Value: 7µA quiescent current extends battery hold-up time; ±1.4% threshold accuracy prevents nuisance trips during line sags. |
Use Scenario: 12V starter battery and 48V mild-hybrid auxiliary supply monitoring in engine control units. IC Role / Device Role / Timing Role: Independent voltage watchdog for both rails, triggering safe shutdown if either falls below OEM-defined thresholds (e.g., 10.5V/40V). Use Value: 100V output rating allows direct connection to high-side gate drivers; built-in hysteresis avoids oscillation during cranking transients. |
| Industrial PLC Power Rails | Server PSU Redundancy Control |
|
Use Scenario: Supervising 24V control logic and 48V actuator power in programmable logic controllers. IC Role / Device Role / Timing Role: Dual comparator generating separate FAULT_A and FAULT_B signals for redundant power path validation. Use Value: Independent range selection (e.g., 10x on 24V, 20x on 48V) maintains optimal INH/INL voltage within 0.35–2.45V common-mode range. |
Use Scenario: Detecting loss-of-output in parallel server power supplies with OR-ing FET control. IC Role / Device Role / Timing Role: Wire-OR'd OUTA/OUTB outputs driving gate of high-side N-channel OR-ing MOSFET to isolate failed PSU. Use Value: 40–80µs propagation delay enables sub-100µs fault response; 5mA sink capability directly drives MOSFET gate without buffer. |
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 |
|---|---|---|---|
| MAX6375KA+T | Single-channel, 60V max, 1.25V fixed threshold, no range selection or REF output | Lacks dual monitoring, adjustable thresholds, and high-voltage flexibility - suitable only for simple single-rail UVLO. | Select LTC2966IUD#PBF when dual independent rails, programmable thresholds, or >60V operation are required. |
| TPS3897ADBVR | Single-channel, 60V max, 1% accuracy, integrated watchdog timer, no REF pin or hysteresis control | Includes window-watchdog functionality but lacks dual monitoring, range scaling, and 100V output drive. | Choose LTC2966IUD#PBF for true dual-rail supervision with precision hysteresis and 100V-compatible outputs. |
Compared with MAX6375KA+T and TPS3897ADBVR, the LTC2966IUD#PBF uniquely delivers dual independent 100V monitoring channels with user-configurable scaling, on-chip reference, and hysteresis - making it the only option for compact, high-accuracy supervision of multiple high-voltage rails in space-constrained industrial and automotive designs.
Availability
LTC2966IUD#PBF is available at Aetrix Electronics and suitable for telecom power systems, automotive battery management units, industrial PLCs, and server redundant PSUs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2966IUD#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2966IUD#PBF belongs to Linear's precision power supervision product line, engineered specifically for high-reliability voltage monitoring in harsh environments where wide input range, micropower operation, and guaranteed accuracy over temperature are mandatory.
FAQ
What is the maximum input voltage the LTC2966IUD#PBF can monitor?
The LTC2966IUD#PBF supports an absolute maximum input voltage of 140V on VINA and VINB, with guaranteed operation from 3.5V to 100V. Its internal 70MΩ resistive dividers enable direct monitoring of 48V, 60V, and 96V industrial and telecom rails without external components - reducing bill-of-materials cost and PCB area while maintaining 7µA quiescent current.
How does the LTC2966IUD#PBF achieve ±1.4% threshold accuracy over temperature?
The LTC2966IUD#PBF achieves ±1.4% max threshold accuracy over –40°C to +85°C through trimmed internal resistive dividers (±0.4% range error), low-offset comparators (±3mV), and a tightly regulated 2.402V reference (±12mV). These specifications are tested and guaranteed across temperature - eliminating need for system-level calibration in industrial and automotive applications.
Can the LTC2966IUD#PBF monitor two different voltage rails simultaneously?
Yes, the LTC2966IUD#PBF independently monitors VINA and VINB with fully separate configurations: each channel has dedicated INHA/INLA/RS1A/RS2A/PSA and INHB/INLB/RS1B/RS2B/PSB pins. This allows distinct range scaling (e.g., 10x on 24V, 40x on 96V), independent hysteresis, and polarity control - essential for redundant power architectures.
What is the purpose of the REF pin on the LTC2966IUD#PBF?
The REF pin on the LTC2966IUD#PBF provides a buffered 2.402V ±12mV reference used to bias external resistive dividers that set INH and INL voltages. It also serves as a logic-high source for RS1/RS2 and PSA/PSB pins. The REF output supports up to 100µA load and requires ≤1nF bypass capacitance for stability - enabling accurate, low-drift threshold configuration without external references.
Does the LTC2966IUD#PBF require external pull-up resistors on OUTA and OUTB?
No - the LTC2966IUD#PBF includes internal 500kΩ pull-up resistors to an internally generated 3.5–5V rail, eliminating need for external pull-ups in low-power applications. However, external pull-up resistors (to up to 100V) are supported and automatically disabled when external voltage exceeds VOH (~2.5V), enabling direct interface to high-voltage logic or optocouplers without additional components.
LTC2966IUD#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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LTC2966IUD#PBF FAQ
1.How can I place an order for LTC2966IUD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2966IUD#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 LTC2966IUD#PBF reliable?
The price and inventory of LTC2966IUD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2966IUD#PBF is usually 5 days.
3.What payment methods are accepted for LTC2966IUD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2966IUD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2966IUD#PBF?
LTC2966IUD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2966IUD#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 LTC2966IUD#PBF?
For technical support, including LTC2966IUD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2966IUD#PBF requirements.
6.How does Aetrix verify that LTC2966IUD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2966IUD#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 LTC2966IUD#PBF meets industry standards.
7.What is the process for return or replacement of LTC2966IUD#PBF?
All LTC2966IUD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2966IUD#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 LTC2966IUD#PBF part is unused and in its original packaging.
Return procedure for LTC2966IUD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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