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Analog Devices Inc. LTC2966HUD#TRPBF
- Part No.:
- LTC2966HUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC2966HUD#TRPBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
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Product details
Overview
LTC2966HUD#TRPBF from Analog Devices is a micropower dual-channel high-voltage voltage monitor IC designed for system-level power supervision in harsh environments. 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 is used in automotive battery monitoring, telecom power rails, and industrial DC bus supervision.
For engineers reviewing the LTC2966HUD#TRPBF datasheet, LTC2966HUD#TRPBF pinout, LTC2966HUD#TRPBF application, or LTC2966HUD#TRPBF equivalent, key selection criteria include its 16-lead QFN package, –40°C to 125°C operating range, built-in hysteresis configuration, scalable 5x–40x internal resistive dividers, and dual-channel undervoltage/overvoltage detection capability.
Technical Context
The LTC2966HUD#TRPBF integrates two independent comparator channels, each with programmable attenuation (5x/10x/20x/40x) via RS1/RS2 pins and polarity inversion via PSA/PSB pins. Each channel uses an internal 70MΩ resistive divider and compares scaled VIN against externally set INH/INL reference voltages derived from the 2.402V on-chip REF.
It features a prioritized dual-supply architecture where VINA dominates internal rail generation, UVLO activation at 3V, and 100V-tolerant outputs with internal 500kΩ pull-up to a 3.5–5V internal supply. Built-in hysteresis (14–30mV) is enabled by grounding INH or INL, scaling linearly with range selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3.5V to 100V on VINA/VINB - supports direct monitoring of 24V, 48V, and 96V DC systems without external level-shifting. |
| Quiescent Current | 7µA typical - enables multi-year battery operation in portable or remote sensor nodes. |
| Threshold Accuracy | ±1.4% max over –40°C to 125°C - ensures reliable trip points across automotive and industrial thermal profiles. |
| Output Rating | 100V absolute max on OUTA/OUTB - allows direct connection to high-side rails up to 98V with external pull-up. |
| Internal Reference | 2.402V ±12mV - stable, low-noise (140µVRMS) bias source for accurate external resistor-divider threshold setting. |
| Propagation Delay | 40–80µs - sufficient for slow-moving power-rail faults (e.g., battery sag, brownout), not intended for fast transient detection. |
| Package & Temp Grade | 16-lead 3mm × 3mm QFN, –40°C to 125°C - qualified for under-hood automotive and high-temp industrial PCB layouts. |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic QFN with exposed pad (UD package). Thermal resistance θJA = 68°C/W. Exposed pad may be left floating or connected to GND for improved thermal performance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 | Standard I/O or power terminals as defined in datasheet | Exact mapping per top-view diagram: Pin 1 = GND, Pin 2 = REF, Pin 3 = INHA, Pin 4 = INLA, Pin 5 = RS1A, Pin 6 = GND, Pin 7 = INHB, Pin 8 = INLB, Pin 9 = RS1B, Pin 10 = OUTA, Pin 11 = VINA, Pin 12 = VINB, Pin 13 = OUTB, Pin 14 = RS2A, Pin 15 = PSA, Pin 16 = PSB. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monitoring channels | Enables simultaneous supervision of primary and backup supplies (e.g., main 48V + battery 24V) with no shared timing or logic dependency. |
| Selectable 5x/10x/20x/40x internal scaling | Eliminates need for high-voltage external resistors - reduces BOM count, board space, and leakage-induced error in >24V systems. |
| Built-in hysteresis (14–30mV) | Configurable per channel by grounding INH or INL - avoids external RC networks and prevents chatter during slow-rising/falling fault conditions. |
| 100V-rated open-drain outputs | Supports wire-OR of OUTA/OUTB and direct interface to 12V/24V/48V logic or optocoupler inputs without level translators. |
| Polarity-selectable outputs | PSA/PSB pins allow inverting/noninverting behavior - simplifies integration with existing MCU GPIO interrupt logic regardless of active-high/low requirements. |
Applications
| Automotive Battery Supervision | Telecom 48V DC Power Shelf |
|---|---|
Use Scenario: Monitoring 12V starter battery and 48V mild-hybrid rail in ADAS ECUs under extreme ambient temperatures. IC Role / Device Role / Timing Role: Dual-channel undervoltage lockout detector with independent thresholds and hysteresis per rail. Use Value: Ensures safe shutdown before critical voltage collapse; ±1.4% accuracy maintains functional safety integrity across –40°C to 125°C. | Use Scenario: Real-time status reporting of redundant 48V DC feeds in central office power distribution units. IC Role / Device Role / Timing Role: High-side voltage supervisor interfacing directly to 48V rail via internal 20x divider and driving optocoupler inputs. Use Value: 100V output rating eliminates level-shifters; 7µA quiescent current minimizes standby loss in always-on monitoring circuits. |
| Industrial DC Bus Monitoring | Portable Medical Equipment Power Management |
Use Scenario: Detecting overvoltage/undervoltage events on 96V DC bus in motor drive inverters with field-wiring tolerance. IC Role / Device Role / Timing Role: Dual-threshold comparator using INHA/INLA to define 85V OV and 75V UV windows on same VINA input. Use Value: Internal 40x scaling enables precise 96V monitoring with low-value external resistors - improves long-term stability vs. high-MΩ external dividers. | Use Scenario: Low-power battery fuel gauge and charger supervision in handheld ultrasound devices with Li-ion + supercap backup. IC Role / Device Role / Timing Role: Micropower dual monitor tracking main battery (VINA) and backup capacitor (VINB) with independent UVLO flags. Use Value: 7µA total supply current extends runtime between charges; 16-pin QFN fits tight space constraints in portable enclosures. |
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 input, fixed 2.5V reference, no internal scaling resistors - requires external HV dividers. | Suitable only for single-rail monitoring; lacks dual-channel independence and programmable hysteresis. | Select when cost sensitivity outweighs channel count and design simplicity; verify external resistor accuracy impact on threshold drift. |
| TPS3897ADRYR | Single-channel, 60V max, integrated 1.225V reference, no internal dividers, 1.5µA IQ - lower power but narrower voltage range. | Targeted at low-voltage industrial sensors; cannot monitor >60V rails without external attenuation. | Prefer for sub-60V systems where ultra-low IQ is critical; not viable for 96V battery or telecom applications. |
Compared with LTC2966HUD#TRPBF, MAX6375KA+T and TPS3897ADRYR offer lower unit cost but require external high-voltage resistive networks, lack dual independent channels, and do not support 100V operation - making them unsuitable for automotive 48V/96V or telecom 48V shelf monitoring where LTC2966HUD#TRPBF's integrated scaling and robustness deliver measurable BOM and validation savings.
Availability
LTC2966HUD#TRPBF is available at Aetrix Electronics and suitable for automotive battery management, telecom power shelf supervision, and industrial DC bus monitoring requiring stable component supply across extended temperature ranges.
Supply support for LTC2966HUD#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 precision instrumentation, industrial automation, and automotive markets.
The LTC2966 product line delivers micropower, high-voltage supervision ICs optimized for reliability-critical power monitoring in automotive, telecom, and industrial equipment - emphasizing accuracy, wide temperature operation, and integration of high-voltage sensing.
FAQ
What is the maximum input voltage the LTC2966HUD#TRPBF can safely monitor?
The LTC2966HUD#TRPBF supports a continuous operating input voltage range of 3.5V to 100V on VINA and VINB pins. Its absolute maximum rating is 140V, allowing tolerance for transient spikes during hot-swap events. For sustained operation, the device is rated for 100V - enabling direct monitoring of 48V and 96V DC systems without external attenuation. The LTC2966HUD#TRPBF achieves this via internal 70MΩ high-value resistive dividers and blocking circuitry on the OUT pins.
How does the LTC2966HUD#TRPBF achieve ±1.4% threshold accuracy over temperature?
The LTC2966HUD#TRPBF achieves ±1.4% max threshold accuracy across –40°C to 125°C through three key mechanisms: a trimmed 2.402V bandgap reference (±12mV), low comparator offset voltage (±3mV), and tightly controlled internal resistive divider range error (±0.4%). These parameters are characterized and guaranteed over temperature - not estimated. The LTC2966HUD#TRPBF datasheet specifies this accuracy under full-range conditions, including worst-case combinations of VREF drift, VOS shift, and AVERR contribution.
Can the LTC2966HUD#TRPBF monitor two different voltage rails simultaneously?
Yes, the LTC2966HUD#TRPBF is explicitly designed for independent dual-rail monitoring: VINA and VINB accept separate input voltages up to 100V each. Each channel has dedicated INHA/INLA/RS1A/RS2A/PSA and INHB/INLB/RS1B/RS2B/PSB pins, enabling distinct threshold configurations, hysteresis settings, and output polarities. This allows the LTC2966HUD#TRPBF to supervise, for example, a 48V main supply and a 12V auxiliary rail concurrently with no cross-talk or shared timing constraints.
What is the purpose of the REF pin on the LTC2966HUD#TRPBF, and can it power external circuitry?
REF provides a buffered 2.402V ±12mV reference output used to bias external resistor dividers that set INH/INL thresholds. It can source/sink up to ±100µA while maintaining regulation. While usable for low-current external biasing (e.g., op-amp references or logic level-setting), it is not intended as a general-purpose supply - the LTC2966HUD#TRPBF datasheet specifies strict load limits to preserve threshold accuracy. For higher current needs, a dedicated reference like LT6656 is recommended.
Does the LTC2966HUD#TRPBF require external pull-up resistors on OUTA and OUTB?
No - the LTC2966HUD#TRPBF includes internal 500kΩ pull-up resistors to an internally generated 3.5–5V supply, enabling immediate operation with floating outputs. External pull-ups are optional and used only when driving higher-voltage logic (e.g., 12V, 24V, or 48V) or implementing wire-OR functionality. The internal pull-up draws no current if an external resistor pulls OUT above VOH (~2.375V), preserving the 7µA quiescent current advantage in low-power designs.
LTC2966HUD#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:
- 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#TRPBF FAQ
1.How can I place an order for LTC2966HUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2966HUD#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 LTC2966HUD#TRPBF reliable?
The price and inventory of LTC2966HUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2966HUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2966HUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2966HUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2966HUD#TRPBF?
LTC2966HUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2966HUD#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 LTC2966HUD#TRPBF?
For technical support, including LTC2966HUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2966HUD#TRPBF requirements.
6.How does Aetrix verify that LTC2966HUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2966HUD#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 LTC2966HUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2966HUD#TRPBF?
All LTC2966HUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2966HUD#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 LTC2966HUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2966HUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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