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Analog Devices Inc. LTC2966HSW#PBF
- Part No.:
- LTC2966HSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC2966HSW#PBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,485
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Product details
Overview
LTC2966HSW#PBF from Analog Devices is a micropower dual-channel high-voltage voltage monitor IC designed for system-level power supervision in harsh industrial and automotive 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 telecom power shelves to detect undervoltage faults on +48V and +24V rails before system reset.
For engineers reviewing the LTC2966HSW#PBF datasheet, LTC2966HSW#PBF pinout, LTC2966HSW#PBF application, or LTC2966HSW#PBF equivalent, key selection criteria include its –40°C to 125°C operating range, selectable 5x/10x/20x/40x internal resistive divider scaling, built-in hysteresis configuration via INH/INL grounding, and polarity-selectable outputs for flexible undervoltage/overvoltage detection logic.
Technical Context
The LTC2966HSW#PBF implements two independent comparator channels, each with programmable attenuation (5x–40x) via RS1/RS2 pins and polarity inversion via PSA/PSB pins. Each channel uses an internal high-impedance resistive divider (70MΩ) to sense VINA or VINB, referenced to a buffered 2.402V internal reference (REF).
Thresholds are set by external voltages applied to INHA/INLA (Channel A) and INHB/INLB (Channel B), scaled by the selected range; built-in hysteresis (14–30mV) is enabled by grounding either INH or INL. Outputs (OUTA/OUTB) feature 100V-rated active pull-down and internal 500kΩ pull-up to a 3.5–5V internal rail, supporting wire-OR configurations without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3.5V to 100V on VINA or VINB - supports direct monitoring of telecom +48V, industrial +24V, and automotive battery rails without external level-shifting. |
| Quiescent Current | 7µA typical - enables always-on supervision in battery-backed systems with multi-year runtime. |
| Threshold Accuracy | ±1.4% max over –40°C to 125°C - ensures reliable trip points across automotive under-hood and industrial control cabinet temperatures. |
| Internal Reference | 2.402V ±12mV - provides stable bias for external resistor dividers setting INH/INL thresholds; low 140µVRMS noise avoids false triggering. |
| Output Rating | 100V absolute max on OUTA/OUTB - allows direct connection to high-side supply rails up to 98V (40x range) with no external protection. |
| Propagation Delay | 40–80µs at 10x overdrive - delivers fast fault response for critical power sequencing and hot-swap event detection. |
| Temperature Range | –40°C to +125°C ambient - qualified for H-grade operation in engine control units, base station power supplies, and railway electronics. |
Pinout & Package
Package: 20-Lead Plastic Small Outline (Wide, 0.300 inch), RoHS-compliant, lead-free finish (PBF). Exposed pad not present in SW package.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VINA | Channel A high-voltage monitor input | Senses up to 100V via internal 70MΩ divider; powers internal circuitry with priority over VINB. |
| VINB | Channel B high-voltage monitor input | Senses up to 100V; internal supply derived only if VINA < UVLO threshold. |
| OUTA / OUTB | Active-low, high-voltage open-drain outputs | 100V-rated pull-down + internal 500kΩ pull-up to 3.5–5V rail; polarity configurable via PSA/PSB. |
| INHA / INHB | Channel A/B high-threshold reference inputs | Set rising-edge trip point when scaled by RS1/RS2; ground to enable rising-edge hysteresis. |
| INLA / INLB | Channel A/B low-threshold reference inputs | Set falling-edge trip point when scaled by RS1/RS2; ground to enable falling-edge hysteresis. |
| RS1A/RS2A / RS1B/RS2B | Channel A/B range select inputs | Binary-coded pins selecting 5x/10x/20x/40x internal attenuation for 1.75–98V monitor range. |
| PSA / PSB | Channel A/B polarity select inputs | Ground = noninverting (OUT low on undervoltage); REF = inverting (OUT low on overvoltage). |
| REF | 2.402V buffered reference output | Stable bias source for external INH/INL resistor networks; max 100µA load. |
| GND | Analog ground reference | Return path for all internal circuits and reference; must be low-impedance connection. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-voltage monitoring channels | Enables simultaneous supervision of primary and backup power rails (e.g., +48V main and +24V standby) with separate thresholds and hysteresis. |
| Selectable 5x/10x/20x/40x internal resistive scaling | Eliminates need for high-voltage external dividers; reduces board space and leakage error while maintaining ±1.4% accuracy. |
| Built-in hysteresis via INH/INL grounding | Reduces external component count to two resistors per channel when precise hysteresis (14–880mV referred to VIN) is required. |
| Polarity-selectable outputs (PSA/PSB) | Supports both active-low undervoltage alerts and active-low overvoltage alerts using same device footprint and layout. |
| 100V-rated outputs with internal 500kΩ pull-up | Permits direct interface to microcontroller GPIOs or FPGAs without level shifters or external pull-ups, simplifying BOM and layout. |
Applications
| Telecom Power Shelf Supervision | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Monitoring +48V and +24V DC distribution rails in 19-inch rack-mounted telecom equipment for brownout detection and graceful shutdown. IC Role / Device Role / Timing Role: Dual-channel voltage supervisor providing independent undervoltage lockout signals to system management controller. Use Value: 7µA quiescent current extends backup battery life; ±1.4% threshold accuracy prevents nuisance trips during line transients. | Use Scenario: Supervising 12V battery and 5V MCU supply in under-hood ECU modules exposed to –40°C to +125°C ambient. IC Role / Device Role / Timing Role: High-temperature voltage monitor generating reset assertion when battery drops below 9V or MCU rail falls below 4.5V. Use Value: H-grade qualification ensures reliable operation at 125°C; 100V output rating tolerates load-dump transients up to 140V. |
| Industrial PLC Power Sequencing | Hot-Swap Controller Auxiliary Monitor |
Use Scenario: Verifying correct ramp-up sequence of multiple isolated DC-DC converter outputs (+15V analog, +5V digital, +3.3V I/O) before enabling downstream loads. IC Role / Device Role / Timing Role: Precision dual comparator with independently adjustable thresholds and hysteresis for timing-critical power-good validation. Use Value: Programmable 5x–40x scaling allows identical design reuse across different rail voltages; REF pin simplifies biasing of threshold networks. | Use Scenario: Providing secondary overvoltage/undervoltage detection in conjunction with dedicated hot-swap controllers (e.g., LTC4215) to enhance fault coverage. IC Role / Device Role / Timing Role: Redundant voltage supervisor verifying that hot-swap MOSFET gate drive and output voltage remain within safe limits during insertion. Use Value: 40µs propagation delay enables sub-100µs fault response; 100V output rating interfaces directly to hot-swap controller enable pins. |
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 |
|---|---|---|---|
| LTC2965HSW#PBF | Single-channel version; identical 100V rating, –40°C to 125°C range, and 7µA IQ but lacks second monitor channel and associated pins (VINB, OUTB, INHB, INLB, etc.). | Requires two devices to replicate dual-monitor functionality; increases PCB area and BOM count. | Select LTC2966HSW#PBF when space-constrained designs require two independent high-voltage rails monitored in one package. |
| MAX6805–MAX6809 family (e.g., MAX6806US29D3+T) | Lower voltage range (up to 5.5V), fixed thresholds, no internal reference or scaling; SOT-23-5 package; 1.6µA IQ but no high-voltage capability. | Only suitable for low-voltage logic rail monitoring (e.g., 3.3V, 5V); cannot replace LTC2966HSW#PBF in >12V applications. | Choose MAX6806 only for cost-sensitive, low-voltage, single-rail applications where high-voltage tolerance is unnecessary. |
Compared with LTC2965HSW#PBF, the LTC2966HSW#PBF saves board space and interconnect complexity by integrating two fully independent 100V monitors; compared with MAX6806, it enables direct high-voltage rail supervision without external dividers or level shifters-critical for telecom and automotive systems.
Availability
LTC2966HSW#PBF is available at Aetrix Electronics and suitable for telecom power shelf supervision, automotive ECU voltage monitoring, and industrial PLC power sequencing requiring stable component supply across extended temperature ranges.
Supply support for LTC2966HSW#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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2966HSW#PBF belongs to Analog Devices' Linear Technology voltage supervisor product line, engineered specifically for high-reliability, high-voltage power monitoring in mission-critical systems where precision, low power, and wide temperature operation are mandatory.
FAQ
What is the maximum input voltage the LTC2966HSW#PBF can monitor?
The LTC2966HSW#PBF supports a maximum input voltage of 100V on VINA or VINB under normal operating conditions, with an absolute maximum rating of 140V. Its internal 70MΩ resistive divider enables direct sensing of high-voltage rails such as +48V telecom supplies and +24V industrial controls without external components. Operation above 100V is limited by the 140V absolute maximum rating and requires careful transient analysis per the datasheet's Hot Swap Events section.
How does the LTC2966HSW#PBF achieve ±1.4% threshold accuracy over temperature?
The LTC2966HSW#PBF achieves ±1.4% threshold accuracy over –40°C to +125°C through a combination of trimmed internal resistive dividers (±0.4% range error), low-offset comparators (±3mV), a highly stable 2.402V reference (±12mV), and matched temperature coefficients across its signal chain. This specification is verified across the full H-grade temperature range and accounts for worst-case contributions from reference drift, comparator offset, and internal divider error as documented in the Electrical Characteristics table.
Can the LTC2966HSW#PBF monitor two different voltage rails simultaneously?
Yes, the LTC2966HSW#PBF is explicitly designed for simultaneous dual-rail monitoring: Channel A monitors VINA (e.g., +48V) and Channel B monitors VINB (e.g., +24V), each with independent range selection (RS1A/RS2A, RS1B/RS2B), threshold references (INHA/INLA, INHB/INLB), polarity control (PSA, PSB), and outputs (OUTA, OUTB). The datasheet Typical Application circuit demonstrates this exact use case with discrete 48V and 24V undervoltage detection.
What is the purpose of the REF pin on the LTC2966HSW#PBF?
The REF pin on the LTC2966HSW#PBF provides a buffered 2.402V reference output used to bias external resistor networks that set the INHA/INLA and INHB/INLB threshold voltages. It eliminates the need for an external reference, supports low-leakage (<1nA) input biasing, and serves as a logic-high voltage source for the RS1/RS2 and PSA/PSB control pins. The REF pin can drive up to 100µA while maintaining ±12mV accuracy over temperature.
Does the LTC2966HSW#PBF require external pull-up resistors on OUTA and OUTB?
No, the LTC2966HSW#PBF includes an internal 500kΩ pull-up resistor to an internally generated 3.5–5V supply, eliminating the need for external pull-ups in most applications. External pull-ups may be added for faster rise times or higher voltage logic interfacing (up to 100V), but the internal pull-up ensures functional operation with zero external components on OUTA/OUTB - a key advantage for space-constrained and low-BOM designs.
LTC2966HSW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 20-SO
LTC2966HSW#PBF FAQ
1.How can I place an order for LTC2966HSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2966HSW#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 LTC2966HSW#PBF reliable?
The price and inventory of LTC2966HSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2966HSW#PBF is usually 5 days.
3.What payment methods are accepted for LTC2966HSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2966HSW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2966HSW#PBF?
LTC2966HSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2966HSW#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 LTC2966HSW#PBF?
For technical support, including LTC2966HSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2966HSW#PBF requirements.
6.How does Aetrix verify that LTC2966HSW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2966HSW#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 LTC2966HSW#PBF meets industry standards.
7.What is the process for return or replacement of LTC2966HSW#PBF?
All LTC2966HSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2966HSW#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 LTC2966HSW#PBF part is unused and in its original packaging.
Return procedure for LTC2966HSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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