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Analog Devices Inc. LTC2965CMS#TRPBF
- Part No.:
- LTC2965CMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2965CMS#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,032
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Product details
Overview
LTC2965CMS#TRPBF from Analog Devices is a micropower, high-voltage single-channel voltage monitor IC designed for system-level supply supervision in 3.5V–100V applications. It features internal 10×/40× resistive dividers, ±1.4% threshold accuracy over temperature, 7µA quiescent current, and a 100V-rated open-drain output with integrated 500kΩ pull-up. It is used in telecom power rails to detect undervoltage on +48V systems.
For engineers reviewing the LTC2965CMS#TRPBF datasheet, LTC2965CMS#TRPBF pinout, LTC2965CMS#TRPBF application, or LTC2965CMS#TRPBF equivalent, key selection considerations include VIN monitor range scalability (10x/40x), built-in hysteresis configuration via INH/INL grounding, polarity inversion control (PS pin), and MSOP-16 package compatibility with high-voltage creepage requirements.
Technical Context
The LTC2965CMS#TRPBF implements a high-impedance voltage sensing path using an internal 70MΩ/200kΩ resistive divider network scaled by RS pin selection (10x or 40x), enabling accurate monitoring of VIN from 3.5V to 98V with only 7µA supply current at 100V. Its comparator references externally set thresholds on INH and INL pins, which are biased from the 2.402V buffered REF output.
Output logic polarity is configurable via PS pin: grounded for noninverting behavior (OUT low when VIN falls below INL×RANGE), or tied to REF for inverting behavior (OUT low when VIN rises above INH×RANGE). The 100V-tolerant OUT pin integrates blocking circuitry to prevent back-conduction when pulled up to external voltages ≤100V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Operating Range | 3.5V to 100V - supports direct monitoring of telecom, industrial, and automotive DC bus voltages without external scaling. |
| Quiescent Current | 7µA typical at 100V - enables always-on supervision in battery-backed or energy-sensitive systems. |
| Threshold Accuracy | ±1.4% max over –40°C to 125°C - ensures reliable trip points across extended temperature ranges without calibration. |
| Reference Voltage | 2.402V ±12mV - stable, buffered REF output used to bias external resistor networks for precise INH/INL threshold setting. |
| Output Rating | 100V absolute max on OUT - allows direct interface to high-side logic or optocoupler drivers without level-shifting components. |
| Hysteresis Options | Built-in 220mV (10x) or 880mV (40x) - selectable by grounding INH or INL, eliminating need for external hysteresis resistors. |
| Package | 16-Lead Plastic MSOP - provides ≥0.79mm creepage between high- and low-voltage pins for >30V applications. |
Pinout & Package
Package: 16-Lead Plastic MSOP (3.0mm × 4.9mm, 0.65mm pitch), exposed pad optional for thermal relief. Designed for high-voltage PCB layout with unconnected pins isolating VIN/OUT from low-voltage pins (REF, INH, INL, PS, RS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input and supply rail | Monitored voltage node connected to internal 70MΩ/200kΩ divider; UVLO activates below 3V. |
| OUT | Open-drain status output | 100V-rated output with internal 500kΩ pull-up to VINT (3.5–5V); sinks current when active; blocks >5V external pull-ups. |
| REF | Buffered reference output | 2.402V ±12mV source for biasing INH/INL dividers; supports ≤1000pF capacitive load directly. |
| INH / INL | Comparator reference inputs | Set rising/falling thresholds as VIN(RISE) = RANGE × INH, VIN(FALL) = RANGE × INL; valid range 0.35–2.45V. |
| RS | Range select input | GND = 10x (3.5–24.5V monitor range), REF = 40x (14–98V monitor range); determines internal divider scaling. |
| PS | Polarity select input | GND = noninverting (OUT low on undervoltage), REF = inverting (OUT low on overvoltage); configures logic sense. |
| GND | Device ground reference | Return path for REF, INH, INL, PS, RS; exposed pad may be left floating or connected to GND for thermal improvement. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable monitor range | 10× or 40× internal scaling selected by RS pin - eliminates external high-voltage resistors while maintaining precision. |
| Built-in hysteresis | 220mV (10x) or 880mV (40x) fixed hysteresis - enabled by grounding INH (rising-edge) or INL (falling-edge), reducing component count. |
| 100V output tolerance | OUT pin withstands up to 140V absolute max - supports direct connection to 48V, 60V, or 96V systems without clamping diodes. |
| Low-power operation | 7µA supply current at 100V - enables continuous monitoring in portable, remote, or energy-harvested equipment. |
| Temperature-stable reference | 2.402V ±12mV over –40°C to 125°C - provides consistent threshold bias across industrial temperature grades. |
Applications
| Telecom Power Supervision | Industrial 24V/48V Rail Monitoring |
|---|---|
|
Use Scenario: Continuous monitoring of +48V DC distribution in central office equipment to detect brownout conditions before system reset. IC Role / Device Role / Timing Role: Voltage monitor IC generating a logic-low fault signal when VIN drops below 43.2V (–10% tolerance), with 220mV hysteresis to prevent chatter during recovery. Use Value: Eliminates need for discrete Zener + comparator solution; reduces BOM count by 4 components and improves long-term threshold stability vs. resistor-based dividers. |
Use Scenario: Undervoltage lockout for programmable logic controller (PLC) I/O modules powered from 24V industrial bus. IC Role / Device Role / Timing Role: Supervisory IC asserting a system reset signal when 24V rail falls below 21.6V, using 10x range mode and INL-grounded hysteresis for clean release. Use Value: Enables compact PCB layout with 0.79mm creepage compliance in MSOP-16; operates reliably at 85°C ambient without derating. |
| Automotive 12V/24V Battery Backup | High-Voltage Hot-Swap Detection |
|
Use Scenario: Monitoring backup battery voltage in vehicle infotainment head units to initiate graceful shutdown before 12V battery depletion. IC Role / Device Role / Timing Role: Single-supply voltage supervisor detecting <10.5V on 12V rail using 10x scaling and PS = GND for noninverting logic to drive microcontroller interrupt. Use Value: 7µA quiescent current extends battery runtime >12 months in sleep mode; ±1.4% accuracy avoids false trips during cold-cranking transients. |
Use Scenario: Detecting voltage overshoot during hot-swap insertion of line cards into 48V backplane systems. IC Role / Device Role / Timing Role: High-speed comparator with 40µs propagation delay (tPD) triggering protection circuitry when VIN exceeds 52.8V (110% of nominal). Use Value: Internal 40x scaling allows direct 48V monitoring without external attenuators; 140V absolute max rating withstands transient spikes up to 2.5× nominal. |
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; SOT23-3 package; 3.6V–5.5V supply only. | Only suitable for low-voltage rail monitoring (e.g., 3.3V/5V logic supplies), not high-voltage DC buses. | Select when cost-sensitive, fixed-threshold supervision of sub-6V rails is required; cannot replace LTC2965CMS#TRPBF in 24V+ applications. |
| TPS3839G33DBVR | Fixed 3.3V threshold, 1.5µA IQ, 6-pin SOT23; requires external resistor divider for high-voltage monitoring. | Needs external 100:1 divider for 48V monitoring, adding error, board space, and leakage sensitivity. | Choose for ultra-low-power 3.3V domain supervision; avoid where high-voltage direct sensing, accuracy, or hysteresis integration is needed. |
Compared with MAX6326US29D3+T and TPS3839G33DBVR, the LTC2965CMS#TRPBF uniquely combines 100V input tolerance, programmable 10x/40x scaling, ±1.4% accuracy, and built-in hysteresis in a single MSOP-16 device-enabling high-voltage supervision without external passive networks or accuracy compromises.
Availability
LTC2965CMS#TRPBF is available at Aetrix Electronics and suitable for telecom power supervision, industrial 24V/48V rail monitoring, and automotive battery backup systems requiring stable component supply across extended temperature grades.
Supply support for LTC2965CMS#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-quiescent-current system monitoring in harsh environments where reliability, accuracy, and minimal board area are critical.
FAQ
What is the operating temperature range for the LTC2965CMS#TRPBF?
The LTC2965CMS#TRPBF is rated for 0°C to 70°C ambient operation. This commercial-grade temperature specification is defined by the 'C' suffix in the part number and is validated per the manufacturer's electrical characteristics table. It is distinct from the industrial-grade LTC2965IMS#TRPBF (–40°C to 85°C) and high-temp LTC2965HMS#TRPBF (–40°C to 125°C).
Can the LTC2965CMS#TRPBF monitor negative voltages?
Yes - the LTC2965CMS#TRPBF can monitor negative supplies when configured with external level-shifting circuitry. Figure 9 in the official datasheet shows a verified implementation using an NPN transistor (Q1) to shift the OUT signal from a –15V rail to a 5V logic domain. VIN must remain within absolute maximum ratings (–0.3V to 140V), and GND serves as the reference node.
How does the RS pin affect the LTC2965CMS#TRPBF's monitor range?
The RS pin selects the internal resistive divider scaling: tied to GND enables 10× mode (3.5V–24.5V VIN monitor range), while tied to REF enables 40× mode (14V–98V VIN monitor range). This selection directly scales the thresholds - e.g., 2.0V on INH yields 20V rising threshold in 10× mode or 80V in 40× mode - ensuring optimal accuracy across wide input spans.
What is the purpose of the PS pin on the LTC2965CMS#TRPBF?
The PS (Polarity Select) pin configures the logical relationship between VIN and the OUT signal. When PS = GND, the LTC2965CMS#TRPBF operates noninverting: OUT goes low when VIN falls below the INL-scaled threshold. When PS = REF (or >1.4V), it operates inverting: OUT goes low when VIN rises above the INH-scaled threshold - enabling flexible overvoltage or undervoltage detection with one device.
Does the LTC2965CMS#TRPBF require external components to function?
The LTC2965CMS#TRPBF operates autonomously with only VIN, GND, and optionally REF bypassing (≤1nF). However, external resistors are required to set precise thresholds on INH and INL - typically a 3-resistor network or two independent dividers referenced to the 2.402V REF output. Built-in hysteresis reduces this to two resistors if INH or INL is grounded.
LTC2965CMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP
LTC2965CMS#TRPBF FAQ
1.How can I place an order for LTC2965CMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2965CMS#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 LTC2965CMS#TRPBF reliable?
The price and inventory of LTC2965CMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2965CMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2965CMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2965CMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2965CMS#TRPBF?
LTC2965CMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2965CMS#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 LTC2965CMS#TRPBF?
For technical support, including LTC2965CMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2965CMS#TRPBF requirements.
6.How does Aetrix verify that LTC2965CMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2965CMS#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 LTC2965CMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2965CMS#TRPBF?
All LTC2965CMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2965CMS#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 LTC2965CMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2965CMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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