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Analog Devices Inc. LTC2965HMS#PBF
- Part No.:
- LTC2965HMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2965HMS#PBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:164
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Product details
Overview
LTC2965HMS#PBF from Analog Devices is a micropower, high-voltage single-channel voltage monitor IC designed for precise undervoltage/overvoltage supervision in systems with 3.5V–100V supply rails. It features internal 10×/40× scalable resistive dividers, ±1.4% max threshold accuracy over temperature, 7µA quiescent current, and a 100V-rated open-drain output with integrated 500kΩ pull-up. It is used in automotive power rail monitoring where compact, low-power, high-accuracy fault detection is required.
For engineers reviewing the LTC2965HMS#PBF datasheet, LTC2965HMS#PBF pinout, LTC2965HMS#PBF application, or LTC2965HMS#PBF equivalent, key selection criteria include VIN monitor range (3.5V–98V), built-in hysteresis enable via INH/INL grounding, polarity inversion via PS pin, 16-lead MSOP package with 0.79mm creepage, and guaranteed UVLO behavior below 3V.
Technical Context
The LTC2965HMS#PBF implements a high-impedance voltage sensing path using internal 70MΩ/200kΩ and 70MΩ/91kΩ resistive dividers selectable via RS pin (10× or 40× scaling). Its comparator compares scaled VIN against externally set thresholds at INH and INL pins referenced to the 2.402V buffered REF output.
It supports configurable hysteresis: grounding INH enables rising-edge hysteresis (VHYS = 220mV @10×); grounding INL enables falling-edge hysteresis (VHYS = 880mV @40×). The OUT pin delivers 100V-tolerant switching with active pull-down and gated 500kΩ pull-up to an internal 3.5–5V supply, independent of external pull-up voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Operating Range | 3.5V to 100V - supports direct monitoring of 12V, 24V, 48V, and 96V industrial/automotive rails without external divider. |
| Monitor Voltage Range | 3.5V to 98V - full-scale sensing range determined by RS pin setting (10×: 3.5–24.5V; 40×: 14–98V). |
| Quiescent Current | 7µA typical at 100V - enables multi-year battery operation in portable or remote monitoring systems. |
| Threshold Accuracy | ±1.4% max over –40°C to +125°C - ensures reliable trip points across automotive under-hood temperature extremes. |
| Output Rating | 100V absolute max on OUT - allows direct interface to high-side logic or optocouplers without level-shifting circuitry. |
| Reference Voltage | 2.402V ±12mV - stable, buffered REF output used to bias external resistor networks for INH/INL threshold programming. |
| Propagation Delay | 40–80µs - deterministic response time for fast fault detection in safety-critical power sequencing. |
Pinout & Package
16-lead plastic MSOP package (3.0mm × 4.9mm, 0.65mm pitch) with exposed pad optional for thermal relief. Pin 1 marked; pin 9 = GND; pins 2–4 and 10–13 = NC; high-voltage isolation maintained between VIN/OUT and low-voltage control pins (REF/INH/INL/RS/PS) via unconnected guard pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input and supply | Monitored rail input; internally connected to 70MΩ resistive divider; UVLO activates below 3V. |
| REF | Buffered reference output | 2.402V source for biasing external INH/INL resistor networks; supports ≤1nF bypass capacitance. |
| INH | High threshold reference input | Sets rising VIN threshold when scaled by RS; grounding enables built-in rising-edge hysteresis. |
| INL | Low threshold reference input | Sets falling VIN threshold when scaled by RS; grounding enables built-in falling-edge hysteresis. |
| OUT | Open-drain status output | 100V-rated output with internal 500kΩ pull-up; actively pulls low on fault; polarity invertible via PS. |
| GND | Device ground | Reference for all analog signals and digital logic; exposed pad may be left floating or tied to GND. |
| RS | Range select input | Logic-low = 10× scaling (3.5–24.5V); logic-high = 40× scaling (14–98V); driven by REF or GND. |
| PS | Polarity select input | Logic-high = inverting output (OUT low on overvoltage); logic-low = noninverting (OUT low on undervoltage). |
Key Features
| Feature | Design Value |
|---|---|
| Scalable high-voltage sensing | 10×/40× internal resistive divider eliminates need for external high-voltage resistors, reducing BOM count and PCB area. |
| Built-in hysteresis enable | Grounding INH or INL activates fixed 220mV (10×) or 880mV (40×) hysteresis referred to VIN-no external components required. |
| 100V-tolerant output stage | OUT pin withstands up to 100V with no back-conduction; supports direct connection to 24V/48V logic or optocoupler anodes. |
| Automotive-grade temperature range | –40°C to +125°C operation with guaranteed specs-qualified for engine compartment and battery management applications. |
| Low-power reference buffer | 2.402V REF output drives external resistor networks with <±12mV drift over temperature-enables accurate threshold setting. |
Applications
| Automotive Battery Monitoring | Industrial 48V DC Power Distribution |
|---|---|
Use Scenario: Real-time supervision of 12V starter battery and 48V mild-hybrid rail during cold cranking and regenerative braking events. IC Role / Device Role / Timing Role: Voltage monitor IC detecting undervoltage (<10.5V) and overvoltage (>15.5V) on 12V rail; configured with 10× range and grounded INL for falling-edge hysteresis. Use Value: Prevents ECU reset during cranking dips and protects downstream converters from overvoltage transients without external divider loading. |
Use Scenario: Fault detection in telecom and data center 48V intermediate bus systems with strict ripple and transient immunity requirements. IC Role / Device Role / Timing Role: High-accuracy supervisor for 48V rail using 40× range and REF-biased INH/INL; OUT drives isolated fault latch via optocoupler. Use Value: Achieves ±1.4% threshold accuracy over –40°C to +125°C-eliminates calibration drift in uncooled outdoor cabinets. |
| Portable Medical Equipment Power Management | Rail-to-Rail Industrial Sensor Node Supply Monitoring |
Use Scenario: Long-life battery-powered ultrasound or infusion pump with dual-supply (5V logic + 24V motor driver) requiring low-quiescent supervision. IC Role / Device Role / Timing Role: Single LTC2965HMS#PBF monitors both rails: 10× mode for 5V logic (INH=1.2V, INL=1.0V), 40× mode for 24V motor (INH=0.6V, INL=0.5V). Use Value: 7µA total quiescent current extends battery life >5 years in standby-no separate supervisors needed per rail. |
Use Scenario: Condition-based monitoring node powered from wide-input DC-DC converter (3.5V–60V input) deployed in factory automation environments. IC Role / Device Role / Timing Role: Undervoltage lockout (UVLO) and brownout detector using 10× range and built-in hysteresis (INH grounded); OUT drives MCU reset pin. Use Value: Guaranteed UVLO activation below 3V with 70mV hysteresis prevents erratic MCU behavior during input sag-no external hysteresis resistor required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBZR | 3.3V fixed threshold, 6V max VIN, SOT-23-3, 0.9µA IQ | Only suitable for low-voltage rails ≤6V; lacks adjustable range, hysteresis, or high-VIN capability. | Select only for cost-sensitive 3.3V logic supply monitoring where 100V tolerance and programmability are unnecessary. |
| MAX6326LT29D3+T | 2.93V fixed threshold, 5.5V max VIN, SC70-3, 1.6µA IQ | Fixed threshold, no range scaling or REF output; limited to sub-6V applications; no hysteresis configuration flexibility. | Use only for simple, ultra-low-power 3V system reset generation-cannot replace LTC2965HMS#PBF in high-voltage or programmable-threshold designs. |
Compared with TLV809E33DBZR and MAX6326LT29D3+T, the LTC2965HMS#PBF uniquely supports 100V input, user-programmable thresholds via resistive dividers, built-in hysteresis enable, and automotive-grade temperature range-making it irreplaceable in 12V–48V automotive and industrial power supervision.
Availability
LTC2965HMS#PBF is available at Aetrix Electronics and suitable for automotive battery management, industrial 48V power distribution, and portable medical equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2965HMS#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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement, power management, and signal conditioning.
The LTC2965 belongs to Analog Devices' Linear Technology voltage supervisor product line, engineered specifically for high-voltage, low-power, and high-accuracy monitoring in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the maximum input voltage the LTC2965HMS#PBF can safely monitor?
The LTC2965HMS#PBF has an absolute maximum VIN rating of 140V, but its specified monitor range is 3.5V to 98V depending on RS pin configuration (10×: 3.5–24.5V; 40×: 14–98V). Operation beyond 100V violates the Absolute Maximum Ratings and risks permanent damage. For 96V battery systems, the 40× range is recommended with INH/INL set to 2.4V/2.2V to achieve 96V/88V thresholds.
How does the RS pin affect the LTC2965HMS#PBF's threshold accuracy?
The RS pin selects the internal resistive divider scaling factor (10× or 40×), directly impacting threshold error sources. At 40×, range error (AVERR) contributes ±0.4% × 40× × VINL, amplifying errors compared to 10× mode. For example, at VINL = 2.2V, AVERR-induced error is ±352mV (40×) vs ±88mV (10×). Therefore, use the lowest applicable range to maximize accuracy-e.g., 10× for 24V rails instead of 40×.
Can the LTC2965HMS#PBF be used to monitor negative voltages?
Yes-the LTC2965HMS#PBF can monitor negative supplies when configured with external level-shifting circuitry. Figure 9 in the datasheet shows a –15V monitor using an NPN transistor (Q1) to level-shift the OUT signal to a 5V logic domain. VIN must remain within the absolute maximum rating (–0.3V to 140V), so the negative rail is applied to VIN through a current-limiting resistor, and GND is referenced to the most negative potential in the system.
What is the purpose of the PS pin on the LTC2965HMS#PBF?
The PS (Polarity Select) pin configures the logical relationship between VIN and the OUT pin. When PS = GND, the output is noninverting: OUT goes low when VIN falls below the INL threshold (undervoltage detection). When PS = REF or >1.4V, the output is inverting: OUT goes low when VIN rises above the INH threshold (overvoltage detection). This eliminates need for external logic inversion in either fault mode.
Does the LTC2965HMS#PBF require external capacitors for stable operation?
The LTC2965HMS#PBF requires a 1µF ceramic capacitor from REF to GND for optimal reference stability, as shown in Figure 4 of the datasheet. Larger capacitors (>1nF) on REF demand a series damping resistor (e.g., 4.3kΩ for 10nF) to prevent oscillation. No capacitor is required on INH/INL unless filtering is needed; if used, values ≤100pF avoid degrading propagation delay. VIN bypassing is recommended but not mandatory.
LTC2965HMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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:
- 16-MSOP
LTC2965HMS#PBF FAQ
1.How can I place an order for LTC2965HMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2965HMS#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 LTC2965HMS#PBF reliable?
The price and inventory of LTC2965HMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2965HMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2965HMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2965HMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2965HMS#PBF?
LTC2965HMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2965HMS#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 LTC2965HMS#PBF?
For technical support, including LTC2965HMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2965HMS#PBF requirements.
6.How does Aetrix verify that LTC2965HMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2965HMS#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 LTC2965HMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2965HMS#PBF?
All LTC2965HMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2965HMS#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 LTC2965HMS#PBF part is unused and in its original packaging.
Return procedure for LTC2965HMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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