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Analog Devices Inc. LTC2962HUD#PBF
- Part No.:
- LTC2962HUD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC2962HUD#PBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2962HUD#PBF from Analog Devices is a quad configurable power supply supervisor IC designed for high-reliability systems requiring precise voltage monitoring across four independent rails. It delivers ±0.5% threshold accuracy over temperature (–40°C to 125°C), supports 16 selectable thresholds per channel (including 5V/3.3V/2.5V/1.8V/1.5V/1.2V/1.0V and ±ADJ modes), and guarantees RST output validity down to VCC = 1V. It is used in automotive control units to prevent processor malfunction during rail brownout events.
For engineers reviewing the LTC2962HUD#PBF datasheet, LTC2962HUD#PBF pinout, LTC2962HUD#PBF application, or LTC2962HUD#PBF equivalent, this page provides verified technical context, exact pin functions, real-world application mappings, and validated alternative parts with documented functional and packaging differences - all specific to the H-grade 16-lead QFN variant.
Technical Context
The LTC2962HUD#PBF implements a 4-channel analog comparator architecture with internal 1.195V buffered reference and 4-bit ADC-based threshold selection via PG1–PG4 inputs. Each channel independently selects one of 16 preset or adjustable thresholds using external 1% resistors, enabling simultaneous monitoring of mixed-supply systems (e.g., 3.3V, 1.8V, 1.2V, and –5V) with guaranteed ±0.5% accuracy across –40°C to 125°C.
It features a programmable reset timeout (12ms/nF via RT capacitor or fixed 200ms), push-pull or open-drain RST output (configurable via DVCC), and margining support via RDIS input. Unlike LTC2963/LTC2964 variants, it excludes watchdog timer and individual comparator outputs - confirming its role as a pure quad supervisor without timing supervision or per-channel status signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.25V to 5.5V - powers entire IC; ensures operation across industrial and automotive supply rails. |
| Threshold Accuracy | ±0.5% over –40°C to 125°C - eliminates need for calibration; enables tight system voltage margins (e.g., 1V ±4.5% load tolerates 0.955V–0.965V threshold band). |
| Reset Timeout | 12ms/nF (RT) or 200ms internal - allows precise reset hold time tuning for processor boot sequencing or brownout recovery. |
| RST Output Type | Configurable push-pull (DVCC ≥ 1.6V) or open-drain (DVCC = GND) - supports direct interface to 1.8V/3.3V/5V logic families without level shifters. |
| Monitor Input Current | ±15nA in ±ADJ mode; 0.8–1.6MΩ in fixed-threshold modes - minimizes loading on sensitive power rails and enables high-impedance divider networks. |
| Operating Temp | –40°C to 125°C (H-grade) - qualified for under-hood automotive, industrial motor drives, and telecom base station applications. |
| VREF Output | 1.195V ±12mV (±1%) - stable reference for external resistor dividers; drives ≤1000pF bypass capacitors without oscillation. |
Pinout & Package
16-lead 3mm × 3mm plastic QFN (UD package) with exposed pad (Pin 17, optional PCB GND connection). Pinout optimized for compact layout and minimal trace coupling between monitor inputs and reference path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RDIS | Reset Disable Input | Pulling low forces RST high - enables safe voltage margining tests without triggering system reset. |
| MR | Manual Reset Input | Active-low input with internal 10µA pull-up - accepts pushbutton or logic signal; debounced internally for noise immunity. |
| DVCC | Digital Logic Supply | Configures RST output drive strength: ≥1.6V → push-pull to DVCC; GND → open-drain to VCC. |
| VCC | Main Power Supply | 2.25–5.5V supply; powers all circuitry; RST and internal pull-ups referenced to this rail. |
| REF | Buffered Reference Output | 1.195V ±12mV source for PG resistor dividers; sinks/sources ±1mA; stable with ≤1000pF capacitance. |
| PG1–PG4 | Threshold Select Inputs | Analog inputs accepting 0–VREF voltage; decoded by internal 4-bit ADC to select one of 16 thresholds per channel. |
| V1–V4 | Monitor Inputs | High-impedance inputs (±15nA in ±ADJ mode); accept positive/negative supplies via external resistor networks. |
| RST | Reset Output | Open-drain (DVCC = GND) or push-pull (DVCC ≥ 1.6V); guaranteed valid down to VCC = 1V. |
| GND | Device Ground | Primary return path; exposed pad may be connected to PCB ground plane for thermal and EMI performance. |
| RT | Reset Timeout Capacitor Input | Connects to GND via CRT capacitor; sets timeout at 12ms/nF; tie to VCC for fixed 200ms timeout. |
Key Features
| Feature | Design Value |
|---|---|
| ±0.5% threshold accuracy over full temperature range | Reduces required system voltage margin by 1% vs ±1% supervisors - enables smaller bulk capacitors and lower nominal rail voltages. |
| 16 selectable thresholds per channel (5V to 1.0V + ±ADJ) | Supports mixed-rail monitoring (e.g., 3.3V I/O, 1.8V core, 1.2V DDR, –5V analog) without external comparators or DACs. |
| Configurable RST output (push-pull or open-drain) | Eliminates need for external MOSFETs or level translators when interfacing to diverse logic families (1.8V/3.3V/5V). |
| RDIS input for reset disable | Enables in-system voltage margining - e.g., lowering 1.2V core rail to 1.15V while keeping processor running - without false resets. |
| Guaranteed RST operation down to VCC = 1V | Ensures reliable power-on reset assertion even during slow-ramp or brownout conditions on main supply. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Management |
|---|---|
Use Scenario: Monitoring 5V sensor supply, 3.3V MCU core, 1.2V FPGA I/O, and –12V analog bias rail in under-hood ECU. IC Role / Device Role / Timing Role: Quad supervisor asserting RST if any rail falls below threshold; 200ms fixed timeout ensures clean MCU reboot after ignition cycle. Use Value: ±0.5% accuracy prevents nuisance resets during transient load dumps; H-grade temp rating ensures reliability at 125°C ambient. |
Use Scenario: Supervising redundant 24V DC input, 5V logic, 3.3V communication interface, and 1.8V FPGA configuration rail in modular PLC backplane. IC Role / Device Role / Timing Role: Single-chip quad monitor replacing discrete reset ICs; RDIS enables hot-swap testing of 24V input without disrupting logic rails. Use Value: 16-threshold flexibility accommodates legacy and new modules on same board; QFN package supports high-density industrial layout. |
| Telecom Base Station RF Power Amplifier | Medical Imaging Power Sequencing |
Use Scenario: Monitoring +28V PA supply, +5V bias, –5V gate control, and 1.0V digital control rail in GaN amplifier module. IC Role / Device Role / Timing Role: Simultaneous UV/OV detection: +ADJ mode for 28V, –ADJ for –5V, fixed thresholds for 5V/1.0V; RST holds PA enable until all rails stabilize. Use Value: ±ADJ capability eliminates need for external op-amps to scale negative rails; 125°C rating matches PA thermal envelope. |
Use Scenario: Coordinating startup of 12V analog front-end, 5V digital controller, 3.3V memory, and 1.5V ADC reference in MRI subsystem. IC Role / Device Role / Timing Role: Quad supervisor with RT capacitor tuned to 47ms timeout - matches FPGA configuration time before releasing system reset. Use Value: Independent PG inputs allow precise sequencing order without external logic; ±0.5% tolerance ensures consistent timing across production units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6812HEUT+T | Triple supervisor (3 channels), ±1.5% threshold accuracy, SOT-23-6 package, no adjustable thresholds or RDIS. | Limited to three rails; lacks ±ADJ mode and margining support - unsuitable for 4-rail or negative-voltage systems. | Select only if monitoring ≤3 rails with relaxed accuracy requirements and space-constrained layouts. |
| TPS3307-18DGNR | Dual supervisor (2 channels), ±2% accuracy, fixed 1.8V/3.3V thresholds, 8-pin MSOP, no PG programming or RDIS. | Requires two devices for 4-rail coverage; no configurability - increases BOM count and layout complexity. | Choose only for cost-sensitive, low-channel-count designs where fixed thresholds suffice and dual-device routing is acceptable. |
Compared with MAX6812HEUT+T and TPS3307-18DGNR, the LTC2962HUD#PBF provides full 4-channel supervision with ±0.5% accuracy, programmable thresholds, and RDIS functionality - reducing component count, improving system margin, and enabling test-mode voltage margining not possible with fixed-threshold alternatives.
Availability
LTC2962HUD#PBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, telecom base station power amplifiers, and medical imaging subsystems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC2962HUD#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 LTC2962 series belongs to Analog Devices' precision power monitoring product line, engineered specifically for mission-critical systems demanding ultra-accurate, multi-rail voltage supervision with robust operation across extreme temperatures and noisy environments.
FAQ
What is the operating temperature range of the LTC2962HUD#PBF?
The LTC2962HUD#PBF is rated for –40°C to +125°C (H-grade), making it suitable for under-hood automotive applications, industrial motor drives, and telecom infrastructure where ambient temperatures exceed standard commercial or industrial grades. This rating is confirmed in the "ORDER INFORMATION" table and applies to all electrical specifications unless otherwise noted.
Does the LTC2962HUD#PBF include a watchdog timer?
No, the LTC2962HUD#PBF does not include a watchdog timer. Watchdog functionality is exclusive to the LTC2963 variant (e.g., LTC2963HUDC-1#PBF), which adds WDI, WDO, WDS, and WT pins. The LTC2962HUD#PBF pinout and block diagram confirm absence of these signals - it is a dedicated quad supervisor without timing supervision.
How is the reset timeout configured on the LTC2962HUD#PBF?
The LTC2962HUD#PBF supports two reset timeout configurations: (1) connect an external capacitor CRT from RT to GND for adjustable timeout (12ms/nF), or (2) tie RT directly to VCC for a fixed 200ms timeout. Both methods are specified in the Electrical Characteristics table (tRST parameter) and validated in the Applications Information section.
Can the LTC2962HUD#PBF monitor negative voltages?
Yes, the LTC2962HUD#PBF supports negative voltage monitoring via its –ADJ mode. When a channel (e.g., V1) is configured in –ADJ mode using PG1, it compares the input to 0.5V - enabling undervoltage detection on negative rails (e.g., –5V) or overvoltage detection on positive rails. This is explicitly described in the FEATURES and PIN FUNCTIONS sections.
What is the function of the RDIS pin on the LTC2962HUD#PBF?
The RDIS (Reset Disable) pin on the LTC2962HUD#PBF forces the RST output high when pulled low, disabling automatic reset assertion. This allows safe voltage margining - for example, reducing a 1.2V core rail to 1.15V during validation - without triggering a system reset. Its internal 10µA pull-up ensures normal operation when left unconnected.
LTC2962HUD#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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open-Drain or Push-Pull
- Reset:
- Active Low
- Reset Timeout:
- 160ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LTC2962HUD#PBF FAQ
1.How can I place an order for LTC2962HUD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2962HUD#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 LTC2962HUD#PBF reliable?
The price and inventory of LTC2962HUD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2962HUD#PBF is usually 5 days.
3.What payment methods are accepted for LTC2962HUD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2962HUD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2962HUD#PBF?
LTC2962HUD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2962HUD#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 LTC2962HUD#PBF?
For technical support, including LTC2962HUD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2962HUD#PBF requirements.
6.How does Aetrix verify that LTC2962HUD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2962HUD#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 LTC2962HUD#PBF meets industry standards.
7.What is the process for return or replacement of LTC2962HUD#PBF?
All LTC2962HUD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2962HUD#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 LTC2962HUD#PBF part is unused and in its original packaging.
Return procedure for LTC2962HUD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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