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Analog Devices Inc. LTC2962HUD#TRPBF
- Part No.:
- LTC2962HUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC2962HUD#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,863
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Product details
Overview
LTC2962HUD#TRPBF from Analog Devices is a quad configurable power supply supervisor IC designed for high-reliability monitoring of four independent voltage rails in industrial, automotive, and telecom systems. It delivers ±0.5% threshold accuracy over –40°C to +125°C, supports 16 selectable per-channel thresholds (including 5V/3.3V/2.5V/1.8V/1.5V/1.2V/1.0V and ±ADJ modes), and features a programmable reset timeout via external capacitor or fixed 200ms internal timer. Its RST output remains valid down to VCC = 1V.
For engineers reviewing the LTC2962HUD#TRPBF datasheet, LTC2962HUD#TRPBF pinout, LTC2962HUD#TRPBF application, or LTC2962HUD#TRPBF equivalent, key selection criteria include H-grade temperature operation, ±0.5% threshold stability across temperature, push-pull/open-drain RST configurability via DVCC, reset disable (RDIS) for margining, and compatibility with 1% external resistors for precise threshold programming.
Technical Context
The LTC2962HUD#TRPBF implements a 4-channel analog comparator architecture with a buffered 1.195V reference (±0.1% typical drift over temperature) and a 4-bit ADC per PG input to decode resistor-divider ratios into one of 16 preset thresholds. Each channel independently selects between UV, OV, or negative-voltage monitoring using +ADJ (0.5V reference) or –ADJ (0.5V reference with inverted polarity) modes.
Reset assertion is immediate on threshold violation; release occurs after a user-configurable timeout (12ms/nF via CRT or fixed 200ms). The RST output is guaranteed functional at VCC ≥ 1V and supports both open-drain (DVCC = GND) and active push-pull (DVCC ≥ 1.6V) operation - critical for interfacing with diverse logic families in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.25V to 5.5V - powers all circuitry; RST guaranteed functional down to 1V during brownout. |
| Threshold Accuracy | ±0.5% over –40°C to +125°C - enables tighter system voltage margins and relaxed PSU tolerance requirements. |
| Reset Timeout | Configurable 12ms/nF (CRT) or fixed 200ms - allows precise control of processor hold time post-power-up or fault recovery. |
| Reference Voltage | 1.195V ±12mV (–40°C to +125°C) - stable internal reference for accurate PG-input decoding and ±ADJ mode operation. |
| Input Leakage (V1–V4) | ±15nA in ±ADJ mode; 0.8–1.6MΩ in fixed-threshold modes - minimizes error from divider current and enables high-impedance sensing. |
| RST Output Type | Configurable open-drain (DVCC = GND) or push-pull (DVCC ≥ 1.6V) - ensures interoperability with 1.8V/3.3V/5V logic without level shifters. |
| Operating Temp | –40°C to +125°C (H-grade) - qualified for under-hood automotive, base station, and industrial control applications. |
Pinout & Package
16-lead 3mm × 3mm plastic QFN (UD package) with exposed pad (pin 17, optional GND connection). Pin count and layout match LTC2962 family specifications; no thermal or mechanical deviation from datasheet UD package definition.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RDIS | Reset Disable Input | Logic-low disables RST assertion - enables safe voltage margining without triggering system reset. |
| MR | Manual Reset Input | Pulled up internally to VCC (10µA); falling edge forces immediate RST low - supports pushbutton or logic-initiated reset. |
| DVCC | Digital Logic Supply | Configures RST/WDO output drive: GND = open-drain; ≥1.6V = push-pull to DVCC - eliminates need for external pull-ups in mixed-voltage systems. |
| VCC | Analog Power Supply | Primary supply (2.25–5.5V); powers comparators, reference, and internal logic - RST guaranteed functional down to 1V. |
| REF | Buffered Reference Output | 1.195V ±12mV source/sink ≤1mA - used for PG resistor-divider bias and ±ADJ level shifting; stable over full temp range. |
| PG1–PG4 | Threshold Select Inputs | Accept ratiometric voltage (0–VREF) to select one of 16 thresholds per channel via internal 4-bit ADC - enables 1% resistor programming. |
| V1–V4 | Monitor Input Channels | High-impedance inputs (±15nA leakage in ±ADJ) - accept direct rail connections or scaled voltages for UV/OV/negative monitoring. |
| RST | Reset Output | Active-low, configurable drive strength - asserts immediately on fault, releases after timeout when all channels recover. |
| RT | Reset Timeout Capacitor Input | Connect CRT to GND for 12ms/nF timing; tie to VCC for fixed 200ms - provides flexible startup sequencing control. |
| GND | Device Ground | Common reference for all analog and digital functions - exposed pad (pin 17) may be connected to PCB ground for improved thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| ±0.5% Threshold Accuracy Over Temperature | Reduces required system voltage margin by 1% vs ±1% supervisors - enables smaller bulk capacitors and lower nominal rail voltages. |
| 16 Per-Channel Threshold Options | Includes standard rails (5V/3.3V/2.5V/1.8V/1.5V/1.2V/1.0V) and ±ADJ modes - supports simultaneous monitoring of heterogeneous supplies with single IC. |
| Configurable RST Drive (Open-Drain/Push-Pull) | DVCC pin selects output type - eliminates external level shifters when interfacing with 1.8V FPGA I/O or 5V microcontroller reset inputs. |
| Reset Disable (RDIS) Function | Hardware-enables supply margining tests without system reset - critical for validating worst-case voltage droop during load transients. |
| H-Grade Temperature Range (–40°C to +125°C) | Qualified for under-hood automotive ECUs and telecom base station power modules - meets AEC-Q100 stress test requirements. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Management |
|---|---|
Use Scenario: Monitoring 5V sensor supply, 3.3V MCU core, 1.8V FPGA I/O, and 12V ignition rail in engine bay environment. IC Role / Device Role / Timing Role: Quad supervisor asserting RST if any rail falls below programmed threshold; H-grade operation ensures reliability at 125°C ambient. Use Value: ±0.5% accuracy prevents false resets during transient load dumps; RDIS enables margin testing of 5V regulator under cold-crank conditions. |
Use Scenario: Supervising isolated 24V DC-DC outputs powering CPU, I/O, communication, and analog front-end in factory automation controller. IC Role / Device Role / Timing Role: Configured with 24V, 12V, 5V, and 3.3V thresholds using external 1% dividers; RT capacitor sets 50ms reset hold time. Use Value: Single-chip solution reduces BOM count vs discrete supervisors; push-pull RST drives 3.3V CPLD reset directly without pull-up resistor. |
| Telecom Base Station Power Shelf | Medical Imaging Power Sequencing |
Use Scenario: Verifying integrity of +48V backplane, +12V fan supply, +3.3V management controller, and –12V analog bias in outdoor cabinet. IC Role / Device Role / Timing Role: –ADJ mode monitors –12V rail against 0.5V reference; +ADJ mode configures 48V threshold with 10:1 divider. Use Value: Eliminates need for separate negative-voltage supervisor; ±0.5% accuracy ensures compliance with GR-63-CORE telecom reliability standards. |
Use Scenario: Coordinating power-up sequence of detector ASIC (1.2V), FPGA (1.8V), ADC (3.3V), and motor driver (24V) in MRI subsystem. IC Role / Device Role / Timing Role: Four independent thresholds ensure each rail reaches regulation before enabling next stage; RST release timed via CRT. Use Value: Prevents latch-up during ramp-up; 16ms minimum timeout (CRT = 1.33nF) satisfies FPGA configuration timing requirements. |
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, fixed 5V/3.3V/2.5V thresholds only, no ±ADJ or programmable timeout. | Lacks fourth channel and adjustable thresholds - requires two ICs to match LTC2962HUD#TRPBF channel count and flexibility. | Select only if system uses only three standard rails and cost sensitivity outweighs design flexibility and accuracy needs. |
| TPS3307-33DGNR | Dual supervisor (2 channels), ±2.5% accuracy, fixed 3.3V/1.25V thresholds, no external resistor programming, no RDIS or DVCC configuration. | Cannot monitor four rails simultaneously; no support for negative or adjustable thresholds - unsuitable for heterogeneous rail monitoring. | Consider only for simple dual-rail systems where ±0.5% accuracy and quad supervision are not required. |
Compared with MAX6812HEUT+T and TPS3307-33DGNR, the LTC2962HUD#TRPBF provides full quad supervision, ±0.5% accuracy, and hardware-configurable RST drive - enabling single-chip solutions for complex, high-reliability systems where margining, negative rail monitoring, and tight voltage tolerances are mandatory.
Availability
LTC2962HUD#TRPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, and telecom base station power shelves requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2962HUD#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, 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.
FAQ
What is the operating temperature range for the LTC2962HUD#TRPBF?
The LTC2962HUD#TRPBF is rated for –40°C to +125°C (H-grade), making it suitable for under-hood automotive, industrial control, and telecom infrastructure applications. This rating is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet, with all key parameters-including threshold accuracy and reset timeout-guaranteed across this full range.
How does the LTC2962HUD#TRPBF achieve ±0.5% threshold accuracy?
The LTC2962HUD#TRPBF achieves ±0.5% threshold accuracy through a combination of a highly stable 1.195V bandgap reference (±12mV over –40°C to +125°C), precision internal comparator offsets, and a 4-bit ADC that converts PG-input voltage ratios into one of 16 calibrated thresholds. External 1% resistors set the PG voltage, and the ADC's digital decoding eliminates resistor tolerance impact on final threshold value - verified in the Typical Performance Characteristics plots and Electrical Characteristics tables.
Can the LTC2962HUD#TRPBF monitor negative voltages?
Yes, the LTC2962HUD#TRPBF can monitor negative voltages using its –ADJ mode. In this mode, the comparator references the 0.5V internal REF voltage but inverts polarity, so a negative input (e.g., –12V) applied to V1–V4 through an appropriate resistive divider will trigger RST assertion when the input exceeds the programmed negative threshold - explicitly supported in the Applications Information and PIN FUNCTIONS sections of the datasheet.
What is the function of the DVCC pin on the LTC2962HUD#TRPBF?
The DVCC pin on the LTC2962HUD#TRPBF configures the RST output drive type: when grounded, RST operates as an open-drain output weakly pulled to VCC (6µA); when biased ≥1.6V, RST becomes an active push-pull output driven to DVCC voltage. This dual-mode capability eliminates external pull-up resistors in mixed-voltage systems and ensures clean logic-level compatibility - detailed in the PIN FUNCTIONS and OPERATION sections.
Is the LTC2962HUD#TRPBF pin-compatible with other members of the LTC2962/LTC2963/LTC2964 family?
Yes, the LTC2962HUD#TRPBF shares the identical 16-pin 3mm × 3mm QFN (UD) package and pinout with all LTC2962 variants (e.g., LTC2962CUD#TRPBF, LTC2962IUD#TRPBF). However, it is not pin-compatible with LTC2963 or LTC2964, which use a 20-pin 3mm × 4mm QFN (UDC) package and include additional pins (WDI, WDO, WDS, WT, OUT1–OUT4) - confirmed in the ORDER INFORMATION and PIN CONFIGURATION diagrams.
LTC2962HUD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC2962HUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2962HUD#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 LTC2962HUD#TRPBF reliable?
The price and inventory of LTC2962HUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2962HUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2962HUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2962HUD#TRPBF transactions.
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4.How is shipping managed for LTC2962HUD#TRPBF?
LTC2962HUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2962HUD#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 LTC2962HUD#TRPBF?
For technical support, including LTC2962HUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2962HUD#TRPBF requirements.
6.How does Aetrix verify that LTC2962HUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2962HUD#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 LTC2962HUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2962HUD#TRPBF?
All LTC2962HUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2962HUD#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 LTC2962HUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2962HUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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