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Analog Devices Inc. LTC2965HDD#TRPBF
- Part No.:
- LTC2965HDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2965HDD#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,052
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Product details
Overview
LTC2965HDD#TRPBF from Analog Devices is a micropower, high-voltage single-channel voltage monitor IC designed for undervoltage/overvoltage supervision in 14V–98V systems. It features ±1.4% threshold accuracy over temperature, 7µA quiescent current at 100V, 100V-rated open-drain output with internal 500kΩ pull-up, and selectable 10x/40x internal resistive divider scaling via RS pin. Used in automotive power rail monitoring where compact, low-power, high-accuracy supervision is required.
For engineers reviewing the LTC2965HDD#TRPBF datasheet, LTC2965HDD#TRPBF pinout, LTC2965HDD#TRPBF application, or LTC2965HDD#TRPBF equivalent, key selection criteria include guaranteed operation up to 125°C ambient, built-in hysteresis support (14–30mV), polarity inversion via PS pin, and compatibility with external reference sources to improve threshold accuracy beyond ±1.4%.
Technical Context
The LTC2965HDD#TRPBF implements a high-voltage comparator architecture with an integrated 70MΩ/100MΩ scalable resistive divider on VIN, enabling direct monitoring of up to 98V using low-voltage reference inputs (INH/INL). Its buffered 2.402V reference (REF) supports external resistor networks for precise threshold setting while maintaining ±250mV error at 96V input under 40x range.
Threshold hysteresis is configurable either externally via INH–INL differential voltage or internally by grounding INH (rising-edge) or INL (falling-edge), delivering fixed 220mV (10x) or 880mV (40x) hysteresis referred to VIN. The output stage combines active low-side switching with passive high-side pull-up to internal VINT (3.5–5V), allowing safe connection to user-defined 100V rails without back-conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3.5V to 100V input supply - enables direct monitoring of 24V, 48V, and 96V industrial/automotive rails without external level-shifting. |
| Monitor Range (40x) | 14V to 98V - matches common telecom and heavy-duty vehicle battery systems requiring wide dynamic range. |
| Quiescent Current | 7µA typical at 100V - ensures minimal load on battery-backed or energy-harvested systems during long-term standby. |
| Threshold Accuracy | ±1.4% max over –40°C to +125°C - guarantees reliable trip points across full automotive temperature grade without calibration. |
| Output Rating | 100V absolute max on OUT pin - allows direct interface to high-side logic or optocoupler drivers without external protection. |
| Propagation Delay | 40–80µs (10x, 10% overdrive) - provides fast fault response suitable for critical power sequencing and hot-swap control. |
| Reference Voltage | 2.402V ±12mV (–40°C to +125°C) - stable bias source for precision external resistor dividers used to set INH/INL thresholds. |
Pinout & Package
Package: 8-Lead (3mm × 3mm) Plastic DFN (DD), exposed pad optional for thermal relief or GND connection. Rated for –40°C to +125°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Voltage Monitor Input / Supply Rail | High-impedance node connected to internal 70MΩ/100MΩ resistive divider; monitors up to 100V with <15µA input current. |
| REF | Buffered Reference Output | 2.402V ±12mV source for biasing external INH/INL resistor networks; supports ≤100pF direct bypass or RC-damped larger caps. |
| INH | High Threshold Reference Input | Sets rising-edge trip point when scaled by RS-selected range (10x/40x); grounded to enable rising-edge built-in hysteresis. |
| INL | Low Threshold Reference Input | Sets falling-edge trip point when scaled by RS-selected range; grounded to enable falling-edge built-in hysteresis. |
| OUT | Open-Drain Status Output | 100V-rated output with internal 500kΩ pull-up to VINT; sinks current when tripped; polarity inverted via PS pin. |
| GND | Device Ground Reference | Common return for REF, INH, INL, RS, PS; exposed pad may be tied here for improved thermal performance. |
| RS | Range Selection Input | Logic-low = 10x (3.5–24.5V monitor), logic-high = 40x (14–98V monitor); driven by REF or GND per Table 1. |
| PS | Polarity Selection Input | Logic-high (>1.4V) = inverting output (OUT low on overvoltage), GND = noninverting (OUT low on undervoltage). |
Key Features
| Feature | Design Value |
|---|---|
| Scalable High-Voltage Sensing | Internal 10x/40x resistive divider eliminates need for external high-voltage resistors - reduces BOM count and PCB area in 24V–96V systems. |
| Built-In Hysteresis Enable | Grounding INH or INL activates fixed 220mV (10x) or 880mV (40x) hysteresis - prevents chatter near threshold without external components. |
| 100V Output Compatibility | OUT pin withstands 140V abs max and interfaces directly to 100V logic rails - avoids level-shifters or discrete transistor buffers in high-side signaling. |
| Automotive Temperature Grade | –40°C to +125°C operation with full spec compliance - qualified for under-hood and battery-monitoring applications per AEC-Q100 guidelines. |
| Micropower Operation | 7µA typical supply current at 100V - extends battery life in always-on vehicle subsystems such as telematics and ADAS power supervisors. |
Applications
| Automotive Battery Supervision | Industrial 48V DC Power Distribution |
|---|---|
Use Scenario: Monitoring 12V/24V starter battery and 48V mild-hybrid rail for undervoltage lockout and overvoltage fault detection. IC Role / Device Role / Timing Role: Single-chip voltage supervisor providing dual-rail status flags to MCU via isolated GPIOs. Use Value: Eliminates two discrete comparators and reference ICs; achieves ±1.4% trip accuracy across –40°C to +125°C without calibration. |
Use Scenario: Supervising 48V server rack power supplies and telecom rectifiers where transient immunity and long-term stability are critical. IC Role / Device Role / Timing Role: High-voltage monitor generating fail-safe shutdown signals to PMBus controllers during brownout events. Use Value: 7µA quiescent current minimizes standby loss; 100V-rated OUT drives optocouplers directly without external transistors. |
| Telecom Equipment Power Sequencing | EV Onboard Charger Input Monitoring |
Use Scenario: Enabling controlled startup of multi-rail telecom line cards by verifying primary 48V input before releasing secondary supplies. IC Role / Device Role / Timing Role: Precision threshold detector triggering power-good signal after stable 48V rail is confirmed. Use Value: 40µs propagation delay ensures rapid response to input collapse; ±1.4% accuracy prevents false trips during line regulation ripple. |
Use Scenario: Validating 400V–800V EV battery pack input to onboard charger before enabling high-side gate drivers. IC Role / Device Role / Timing Role: Pre-charge supervisor verifying minimum bus voltage prior to main contactor closure. Use Value: 40x range mode supports 14–98V monitoring of auxiliary 12V/24V control rails derived from HV bus - no additional regulators needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US29D3+T | Fixed 2.93V threshold, no adjustable range or hysteresis; 3-pin SOT23 package; 1.2µA IQ. | Only suitable for low-voltage (≤6V) systems; lacks high-voltage input capability and programmability. | Select only for cost-sensitive, single-threshold 3.3V/5V rail monitoring where VIN < 6V. |
| TLV809E29DBZR | Fixed 2.93V reset IC; 3-pin SOT23; 0.5µA IQ; no REF output or hysteresis control. | No high-voltage input - max VIN = 6V; no external threshold configuration; no polarity inversion. | Use only for ultra-low-power, fixed-threshold monitoring of sub-6V logic supplies with no design flexibility. |
Compared with MAX6326US29D3+T and TLV809E29DBZR, the LTC2965HDD#TRPBF uniquely supports 14–98V monitoring with user-programmable thresholds, built-in hysteresis, polarity inversion, and a buffered reference - making it the only viable option for automotive and industrial high-voltage supervision where adaptability and accuracy are mandatory.
Availability
LTC2965HDD#TRPBF is available at Aetrix Electronics and suitable for automotive battery management, industrial 48V power distribution, and telecom equipment requiring stable component supply across extended temperature ranges.
Supply support for LTC2965HDD#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2965 belongs to Linear's precision voltage supervisor product line, engineered specifically for high-voltage, low-power, temperature-resilient monitoring in harsh environments including automotive under-hood and industrial power systems.
FAQ
What is the maximum input voltage the LTC2965HDD#TRPBF can monitor?
The LTC2965HDD#TRPBF supports a VIN monitor range of 14V to 98V when configured in 40x mode (RS = high), and 3.5V to 24.5V in 10x mode (RS = low). Its absolute maximum input rating is 140V, but sustained operation above 100V violates the specified operating range and risks reliability degradation. The device draws only 7µA at 100V, confirming its suitability for continuous high-voltage supervision.
Does the LTC2965HDD#TRPBF require external resistors to set thresholds?
Yes - the LTC2965HDD#TRPBF requires external resistors to bias the INH and INL pins from the internal 2.402V REF output. A typical three-resistor network sets both rising and falling thresholds simultaneously, while two independent dividers offer greater flexibility. Built-in hysteresis (activated by grounding INH or INL) reduces resistor count to two, but external resistors remain essential for threshold definition.
Can the LTC2965HDD#TRPBF operate in automotive under-hood environments?
Yes - the LTC2965HDD#TRPBF is rated for –40°C to +125°C ambient operation and meets full electrical specifications across this range. Its ±1.4% threshold accuracy, 7µA quiescent current, and 100V output rating make it suitable for engine compartment battery supervision, DC-DC converter monitoring, and other under-hood applications where thermal resilience and high-voltage robustness are critical.
How does the polarity selection (PS) pin affect the LTC2965HDD#TRPBF output behavior?
When PS is grounded, the LTC2965HDD#TRPBF output is noninverting: OUT pulls low when VIN falls below the INL-scaled threshold (undervoltage detection). When PS is tied to REF (≥1.4V), the output becomes inverting: OUT pulls low when VIN rises above the INH-scaled threshold (overvoltage detection). This dual-mode operation allows one device to serve both UVLO and OVLO functions without redesign.
Is the internal reference (REF) of the LTC2965HDD#TRPBF stable enough for precision threshold setting?
The REF pin delivers 2.402V ±12mV (±0.5%) over –40°C to +125°C, contributing ±180mV error to a 18V falling threshold in 10x mode. For higher accuracy, an external reference like the LT6656-2.048 (0.05% initial accuracy) can replace REF, reducing total threshold error from ±1.2% to ±0.44%. The LTC2965HDD#TRPBF supports both configurations without modification.
LTC2965HDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Monitor
- Number of Voltages Monitored:
- 1
- 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:
- 8-DFN (3x3)
LTC2965HDD#TRPBF FAQ
1.How can I place an order for LTC2965HDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2965HDD#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 LTC2965HDD#TRPBF reliable?
The price and inventory of LTC2965HDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2965HDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2965HDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2965HDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2965HDD#TRPBF?
LTC2965HDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2965HDD#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 LTC2965HDD#TRPBF?
For technical support, including LTC2965HDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2965HDD#TRPBF requirements.
6.How does Aetrix verify that LTC2965HDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2965HDD#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 LTC2965HDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2965HDD#TRPBF?
All LTC2965HDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2965HDD#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 LTC2965HDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2965HDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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