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Analog Devices Inc. LTC2966ISW#PBF
- Part No.:
- LTC2966ISW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC2966ISW#PBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 20SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2966ISW#PBF from Analog Devices is a micropower dual-channel high-voltage voltage monitor IC designed for system-level power supervision in industrial and automotive electronics. 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 enables precise undervoltage/overvoltage detection in telecom power supplies and battery management systems.
For engineers reviewing the LTC2966ISW#PBF datasheet, LTC2966ISW#PBF pinout, LTC2966ISW#PBF application, or LTC2966ISW#PBF equivalent, key selection considerations include its 20-lead SOIC-Wide package, dual-channel range-selectable scaling (5x–40x), built-in hysteresis options, polarity inversion capability, and guaranteed operation from –40°C to +85°C.
Technical Context
The LTC2966ISW#PBF integrates two independent high-voltage comparator channels, each with programmable internal resistive dividers (5x/10x/20x/40x scaling), dual reference inputs (INHA/INLA, INHB/INLB), and polarity-selectable outputs (PSA/PSB). Each channel uses an internal 70MΩ divider to sense VINA/VINB while drawing only nanoampere-level input bias current.
It features a buffered 2.402V reference (REF), undervoltage lockout (UVLO) at 3V with 70mV hysteresis, and outputs capable of sinking 5mA while tolerating up to 140V absolute maximum. The device prioritizes VINA for internal rail generation and pulls both outputs low when either input falls below UVLO minus hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 3.5V to 100V on VINA or VINB - supports direct monitoring of 24V, 48V, and 96V bus rails without external attenuation |
| Quiescent Current | 7µA typical - enables multi-year battery life in portable and remote monitoring applications |
| Threshold Accuracy | ±1.4% max over –40°C to +85°C - ensures reliable trip points across automotive and industrial temperature ranges |
| Output Rating | 100V output capability with 500kΩ internal pull-up - allows direct interface to high-side logic or optocoupler drivers |
| Input Leakage | ±0.1nA max at INH/INL pins - minimizes error in precision resistor-divider threshold networks |
| Propagation Delay | 40–80µs at 10% overdrive - provides deterministic response timing for fault shutdown sequencing |
| Reference Voltage | 2.402V ±12mV - stable, low-noise (140µVRMS) reference for accurate external threshold setting |
Pinout & Package
Package: 20-Lead Plastic Small Outline (Wide, 0.300 inch), RoHS-compliant, operating temperature range –40°C to +85°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VINA | Channel A high-voltage monitor input | Senses up to 100V via internal 70MΩ divider; powers internal rail with priority over VINB |
| NC | No-connect | Not internally bonded - must be left floating or tied to GND per layout guidelines |
| OUTA | Channel A active-low comparator output | 100V-rated open-drain output with 500kΩ internal pull-up; polarity controlled by PSA |
| NC | No-connect | Not internally bonded - must be left floating or tied to GND |
| REF | 2.402V buffered reference output | Supplies bias for external INH/INL resistor dividers; max 100µA load |
| INHA | Channel A high-threshold reference input | Sets rising-edge trip point when scaled by RS1A/RS2A; grounded to enable rising-edge hysteresis |
| INLA | Channel A low-threshold reference input | Sets falling-edge trip point when scaled by RS1A/RS2A; grounded to enable falling-edge hysteresis |
| RS1A | Channel A range select bit 1 | Configures internal divider scaling (5x/10x/20x/40x) with RS2A per Table 1 |
| RS2A | Channel A range select bit 2 | Paired with RS1A to set channel A attenuation ratio; connect to REF or GND |
| PSA | Channel A polarity select | Ground = noninverting (OUTA low on VINA undervoltage); REF = inverting (OUTA low on overvoltage) |
| VINB | Channel B high-voltage monitor input | Senses up to 100V; used only if VINA < UVLO or for independent dual-rail monitoring |
| NC | No-connect | Not internally bonded - must be left floating or tied to GND |
| OUTB | Channel B active-low comparator output | Functionally identical to OUTA; independently configurable via PSB and RS1B/RS2B |
| NC | No-connect | Not internally bonded - must be left floating or tied to GND |
| GND | Device ground reference | Common return for all analog and digital functions; exposed pad optional connection point |
| INHB | Channel B high-threshold reference input | Same function as INHA, but for Channel B; enables independent dual-threshold configuration |
| INLB | Channel B low-threshold reference input | Same function as INLA, but for Channel B; supports asymmetric hysteresis per channel |
| RS1B | Channel B range select bit 1 | Independent scaling control for Channel B; decoupled from RS1A/RS2A |
| RS2B | Channel B range select bit 2 | Paired with RS1B to configure Channel B's 5x/10x/20x/40x attenuation |
| PSB | Channel B polarity select | Same logic as PSA; allows mixed polarity operation (e.g., OUTA = undervoltage, OUTB = overvoltage) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-voltage monitoring channels | Enables simultaneous supervision of primary and backup rails (e.g., 48V main + 12V control) without external dividers |
| Selectable 5x/10x/20x/40x internal attenuation | Reduces external component count: single 2.4V reference sets thresholds from 1.75V to 98V with no high-voltage resistors |
| Built-in hysteresis with pin-selectable edge activation | Eliminates need for external hysteresis resistors; grounding INHA or INLA configures rising/falling-edge hysteresis (220mV at 10x) |
| 100V-rated outputs with internal 500kΩ pull-up | Directly drives optocouplers, MOSFET gates, or microcontroller interrupts without level-shifting or external pull-ups |
| ±1.4% threshold accuracy over full temperature range | Meets stringent requirements for automotive body control modules and industrial PLC I/O supervision |
Applications
| Telecom Power Supervision | Automotive Battery Management |
|---|---|
Use Scenario: Monitoring –48V DC distribution bus in central office equipment for brownout and overvoltage faults. IC Role / Device Role / Timing Role: Dual-channel voltage monitor detecting undervoltage (–42V) and overvoltage (–56V) thresholds with independent hysteresis. Use Value: Prevents false triggering during line transients using built-in hysteresis and eliminates external high-voltage resistors via 40x scaling. | Use Scenario: Supervising 12V starter battery and 48V mild-hybrid rail in vehicle ECU for cold-crank and load-dump protection. IC Role / Device Role / Timing Role: Simultaneous monitoring of two battery rails with polarity-selectable outputs for separate fault signaling paths. Use Value: Enables fail-safe shutdown within 80µs propagation delay while consuming only 7µA - critical for always-on vehicle modules. |
| Industrial PLC I/O Module | Portable Medical Equipment |
Use Scenario: Detecting loss of 24V field power and 5V logic supply in programmable logic controller backplane. IC Role / Device Role / Timing Role: Dual-channel supervisor generating independent reset signals for CPU and I/O ASICs upon rail failure. Use Value: ±1.4% threshold accuracy ensures compliance with IEC 61000-4-29 immunity testing across –40°C to +85°C ambient. | Use Scenario: Monitoring lithium-ion pack voltage (up to 16.8V) and auxiliary 3.3V MCU supply in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-power dual-supply monitor enabling >5-year shelf life with 7µA quiescent current and automatic UVLO recovery. Use Value: Internal 2.402V reference and 10x scaling allow precise 3.0V/3.3V thresholds using standard 1% resistors - no trimming required. |
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 |
|---|---|---|---|
| LTC2965ISW#PBF | Single-channel version; identical pinout except missing INHB/INLB/RS1B/RS2B/PSB/OUTB pins | Only suitable where one monitored rail suffices; cannot replace dual-rail functionality | Select LTC2965ISW#PBF only when space or cost constraints eliminate need for second channel |
| MAX6375US24+T | Single 24V fixed-threshold monitor; no adjustable range, no dual channel, no hysteresis control | Limited to basic 24V undervoltage detection; lacks flexibility for custom thresholds or dual-rail systems | Choose MAX6375US24+T only for simple, cost-sensitive 24V-only applications with no requirement for configurability |
Compared with LTC2965ISW#PBF and MAX6375US24+T, the LTC2966ISW#PBF uniquely delivers dual independent high-voltage monitoring with fully programmable thresholds, hysteresis, and polarity - making it irreplaceable in systems requiring coordinated supervision of multiple power domains.
Availability
LTC2966ISW#PBF is available at Aetrix Electronics and suitable for telecom power systems, automotive battery management, industrial PLC I/O modules, and portable medical equipment requiring stable component supply across extended temperature ranges.
Supply support for LTC2966ISW#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 LTC2966ISW#PBF belongs to Analog Devices' precision voltage supervisor product line, engineered specifically for high-reliability power monitoring in harsh environments where wide input range, micropower operation, and guaranteed temperature performance are mandatory.
FAQ
What is the maximum input voltage rating for LTC2966ISW#PBF?
The LTC2966ISW#PBF has an absolute maximum input voltage rating of 140V on VINA and VINB pins. Its operational monitoring range is specified from 3.5V to 100V, with guaranteed performance across the full –40°C to +85°C temperature range. Exceeding 140V may cause permanent damage per Absolute Maximum Ratings.
How does the built-in hysteresis work on LTC2966ISW#PBF?
The LTC2966ISW#PBF implements built-in hysteresis by grounding either INHA (for rising-edge hysteresis) or INLA (for falling-edge hysteresis). At 10x range, this yields 220mV hysteresis referred to VIN. The hysteresis voltage scales linearly with range selection: 110mV at 5x, 440mV at 20x, and 880mV at 40x. This eliminates external hysteresis components.
Can LTC2966ISW#PBF monitor two different voltage rails simultaneously?
Yes, the LTC2966ISW#PBF is explicitly designed for simultaneous dual-rail monitoring. VINA and VINB operate independently: each has dedicated range select (RS1A/RS2A, RS1B/RS2B), polarity (PSA/PSB), and reference inputs (INHA/INLA, INHB/INLB). This allows configuring distinct thresholds, hysteresis, and output polarities for two separate power domains.
What is the purpose of the REF pin on LTC2966ISW#PBF?
REF provides a precise 2.402V ±12mV buffered reference output used to bias external resistor dividers that set INHA/INLA and INHB/INLB voltages. It supports up to 100µA load and features low noise (140µVRMS). REF also serves as a logic-high source for range and polarity select pins, eliminating need for additional bias supplies.
Does LTC2966ISW#PBF require external pull-up resistors on OUTA and OUTB?
No, the LTC2966ISW#PBF includes a 500kΩ internal pull-up resistor to an internally generated supply (3.5V–5V). External pull-ups are optional and only needed if higher drive strength, faster rise time, or pull-up to a voltage >5V (up to 100V) is required. The internal pull-up remains active unless an external resistor pulls the output above VOH.
LTC2966ISW#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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
LTC2966ISW#PBF FAQ
1.How can I place an order for LTC2966ISW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2966ISW#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 LTC2966ISW#PBF reliable?
The price and inventory of LTC2966ISW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2966ISW#PBF is usually 5 days.
3.What payment methods are accepted for LTC2966ISW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2966ISW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2966ISW#PBF?
LTC2966ISW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2966ISW#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 LTC2966ISW#PBF?
For technical support, including LTC2966ISW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2966ISW#PBF requirements.
6.How does Aetrix verify that LTC2966ISW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2966ISW#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 LTC2966ISW#PBF meets industry standards.
7.What is the process for return or replacement of LTC2966ISW#PBF?
All LTC2966ISW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2966ISW#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 LTC2966ISW#PBF part is unused and in its original packaging.
Return procedure for LTC2966ISW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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