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Analog Devices Inc. LTC2966IUD#TRPBF
- Part No.:
- LTC2966IUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC2966IUD#TRPBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,425
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Product details
Overview
LTC2966IUD#TRPBF from Analog Devices is a micropower dual-channel high-voltage voltage monitor IC designed for precise undervoltage/overvoltage detection in systems with supply rails up to 100V. It features two independent monitoring channels (A/B), ±1.4% max threshold accuracy over temperature, 7µA quiescent current, and 100V-rated open-drain outputs with internal 500kΩ pull-up. It is used in telecom power supervision, battery backup systems, and industrial DC power rails.
For engineers reviewing the LTC2966IUD#TRPBF datasheet, LTC2966IUD#TRPBF pinout, LTC2966IUD#TRPBF application, or LTC2966IUD#TRPBF equivalent, key selection criteria include input voltage range (3.5V–100V), adjustable threshold scaling (5x/10x/20x/40x), built-in hysteresis configuration, polarity-selectable outputs, and guaranteed operation across –40°C to +85°C.
Technical Context
The LTC2966IUD#TRPBF integrates two independent high-voltage comparator channels, each with programmable internal resistive dividers (5x/10x/20x/40x scaling) and reference-biased INH/INL inputs for threshold setting. Each channel uses an internal 2.402V reference (±0.5% initial accuracy) and supports configurable hysteresis via grounding INH or INL.
Its output stage delivers 100V-rated active pull-down with gated 500kΩ internal pull-up to an internally regulated 3.5V–5V rail; blocking circuitry prevents back-conduction when externally pulled to ≤100V. UVLO activates below 3V on either VINA or VINB, forcing both outputs low regardless of polarity configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 3.5V to 100V on VINA/VINB - supports direct monitoring of high-voltage DC rails without external level-shifting. |
| Quiescent Current | 7µA typical - enables long-life battery-powered supervision in portable and remote equipment. |
| Threshold Accuracy | ±1.4% max over –40°C to +85°C - ensures reliable trip points across industrial temperature range without calibration. |
| Output Rating | 100V absolute max on OUTA/OUTB - allows direct connection to high-side monitored rails up to 98V. |
| Internal Reference | 2.402V ±0.5% (initial), 140µVRMS noise - provides stable bias for external resistor networks setting INH/INL thresholds. |
| Propagation Delay | 40–80µs (typ/max) - sufficient for power-rail fault response while avoiding false triggering on fast transients. |
| Input Leakage | ±0.1nA (I-grade) at INH/INL - minimizes error in high-impedance threshold divider networks. |
Pinout & Package
Package: 16-lead (3mm × 3mm) plastic QFN (UD package) with exposed pad (optional GND connection). RoHS-compliant, lead-free finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference Output | 2.402V buffered reference; supplies bias for external INH/INL dividers and logic-high for RS/PS pins. |
| 2 (INHA) | Channel A High Threshold Input | Scaled by RS1A/RS2A to set rising-edge VINA threshold; ground to enable rising-edge hysteresis. |
| 3 (INLA) | Channel A Low Threshold Input | Scaled by RS1A/RS2A to set falling-edge VINA threshold; ground to enable falling-edge hysteresis. |
| 4 (RS1A) | Channel A Range Select Bit 1 | Configures internal divider scaling: L/L = 5x, H/L = 10x, L/H = 20x, H/H = 40x. |
| 5 (GND) | Ground Reference | Primary return path for internal circuitry and reference; exposed pad may be connected here. |
| 6 (INHB) | Channel B High Threshold Input | Scaled by RS1B/RS2B to set rising-edge VINB threshold; ground to enable rising-edge hysteresis. |
| 7 (INLB) | Channel B Low Threshold Input | Scaled by RS1B/RS2B to set falling-edge VINB threshold; ground to enable falling-edge hysteresis. |
| 8 (RS1B) | Channel B Range Select Bit 1 | Configures internal divider scaling independently per channel (same encoding as RS1A). |
| 9 (OUTA) | Channel A Output | Open-drain, 100V-rated; active-low when VINA violates configured threshold; polarity set by PSA. |
| 10 (VINA) | Channel A Monitor Input | High-impedance input with internal 70MΩ divider; draws only ~7µA at 100V (40x range). |
| 11 (VINB) | Channel B Monitor Input | High-impedance input with internal 70MΩ divider; prioritized lower than VINA for internal supply generation. |
| 12 (OUTB) | Channel B Output | Open-drain, 100V-rated; active-low when VINB violates configured threshold; polarity set by PSB. |
| 13 (RS2A) | Channel A Range Select Bit 2 | Second bit for 2-bit range encoding; must be tied to REF or GND (no floating allowed). |
| 14 (PSA) | Channel A Polarity Select | Connect to REF → inverting output (OUTA low on overvoltage); connect to GND → noninverting (low on undervoltage). |
| 15 (PSB) | Channel B Polarity Select | Same function as PSA, but for Channel B; enables independent polarity configuration per channel. |
| 16 (RS2B) | Channel B Range Select Bit 2 | Second bit for Channel B range encoding; independent of RS2A. |
| 17 (Exposed Pad) | Thermal / Ground Pad | Optional GND connection; improves thermal performance (θJA = 68°C/W) and EMI immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-voltage monitors | Enables simultaneous supervision of primary and backup rails (e.g., 48V main + 24V standby) with no shared timing or coupling. |
| Programmable 5x/10x/20x/40x scaling | Allows precise threshold setting from 1.75V to 98V using low-voltage, low-tolerance resistors - avoids high-voltage precision divider design. |
| Built-in hysteresis (14–30mV) | Eliminates need for external hysteresis components; selectable per channel by grounding INH (rising-edge) or INL (falling-edge). |
| 100V-rated outputs with internal 500kΩ pull-up | Supports direct wire-OR of OUTA/OUTB and eliminates external pull-up resistors in many applications - reduces BOM count and board space. |
| –40°C to +85°C operating range (I-grade) | Qualified for industrial and automotive under-hood environments where extended temperature stability is required for system reliability. |
Applications
| Telecom Power Supervision | Battery Backup Systems |
|---|---|
|
Use Scenario: Monitoring –48V DC distribution bus in central office equipment for undervoltage faults during grid failure. IC Role / Device Role / Timing Role: Dual-channel monitor detects both main –48V rail collapse and secondary –24V battery backup engagement. Use Value: 7µA quiescent current extends battery runtime; ±1.4% threshold accuracy ensures consistent failover timing across temperature. |
Use Scenario: Supervising lithium-ion battery pack voltage during charge/discharge cycles in portable medical devices. IC Role / Device Role / Timing Role: Channel A monitors pack voltage for overvoltage cutoff; Channel B monitors cell balance rail for undervoltage shutdown. Use Value: 100V output rating allows direct interface to high-side sensing; built-in hysteresis prevents chatter near critical thresholds. |
| Industrial DC Power Rails | Automotive Infotainment Power |
|
Use Scenario: Detecting brownout on 24V industrial PLC I/O power supply to trigger controlled shutdown before logic corruption. IC Role / Device Role / Timing Role: Configured as undervoltage monitor with 20x scaling (7V–49V range) and falling-edge hysteresis on INLA. Use Value: Internal 70MΩ divider draws negligible current (<10µA at 24V), eliminating loading effects on sensitive regulation feedback paths. |
Use Scenario: Validating 12V vehicle battery voltage before enabling infotainment head unit during cold cranking (6–14V transients). IC Role / Device Role / Timing Role: Channel A set to 10x range (3.5V–24.5V) with INHA=1.2V → 12V rising threshold; INLA=1.0V → 10V falling threshold. Use Value: Guaranteed operation down to –40°C ensures reliability in unheated vehicle cabins; UVLO prevents false starts below 3V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2965IUD#TRPBF | Single-channel version; identical specs otherwise (same package, temp range, accuracy, 100V outputs). | Requires two units for dual-rail monitoring; increases PCB area and BOM cost vs single LTC2966IUD#TRPBF. | Select when only one rail needs supervision or when channel isolation requirements exceed LTC2966's shared reference architecture. |
| MAX6375–MAX6378 series | Fixed-threshold (non-adjustable) dual monitors; 12V–36V input range; no internal reference or scaling; SOT-23-6 package. | Limited to low-voltage applications; lacks flexibility for custom thresholds or high-voltage rails >36V. | Choose for cost-sensitive, low-voltage designs where fixed thresholds (e.g., 3.08V/3.3V) suffice and board space is constrained. |
Compared with LTC2965IUD#TRPBF, the LTC2966IUD#TRPBF reduces component count by 50% for dual-rail systems; compared with MAX6375-series, it supports 100V operation and fully adjustable thresholds - critical for telecom and industrial power domains.
Availability
LTC2966IUD#TRPBF is available at Aetrix Electronics and suitable for telecom power supervision, battery backup systems, and industrial DC power rails requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for LTC2966IUD#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 power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2966IUD#TRPBF belongs to Linear's precision voltage monitoring product line, engineered specifically for high-reliability, low-power supervision of high-voltage DC rails in harsh environments where accuracy, temperature stability, and fault immunity are critical.
FAQ
What is the maximum input voltage the LTC2966IUD#TRPBF can monitor?
The LTC2966IUD#TRPBF supports a wide input voltage range of 3.5V to 100V on both VINA and VINB pins. Its absolute maximum rating is 140V, making it suitable for monitoring high-voltage DC rails such as telecom –48V, industrial 24V/48V, and automotive 12V/24V systems with transient margin. The actual usable monitoring range depends on selected scaling (e.g., 40x supports 14V–98V).
How does the LTC2966IUD#TRPBF achieve ±1.4% threshold accuracy over temperature?
The LTC2966IUD#TRPBF achieves ±1.4% max threshold accuracy over –40°C to +85°C through a combination of trimmed internal resistive dividers (±0.4% range error), low-offset comparators (±3mV), a stable 2.402V reference (±0.5% initial, ±250mV error at 96V), and matched temperature coefficients across its signal chain. This specification is validated across the full industrial temperature range, not just at 25°C.
Can the LTC2966IUD#TRPBF outputs drive an LED directly?
No - the LTC2966IUD#TRPBF outputs (OUTA/OUTB) are open-drain with an internal 500kΩ pull-up to an internal 3.5V–5V rail. They are rated for ≤5mA sink current and cannot source current. To drive an LED, an external NPN transistor or MOSFET switch referenced to a higher voltage rail (≤100V) is required, with the LTC2966IUD#TRPBF controlling the gate/base.
What happens to the outputs of the LTC2966IUD#TRPBF during undervoltage lockout (UVLO)?
When either VINA or VINB falls below the UVLO threshold (3V, with 70mV hysteresis), both OUTA and OUTB are actively pulled low regardless of polarity configuration (PSA/PSB state) or threshold settings. This failsafe behavior ensures deterministic system shutdown or alert signaling even if input supplies collapse unexpectedly.
Is the LTC2966IUD#TRPBF pin-compatible with other variants in the LTC2966 family?
Yes - all LTC2966 variants (C/I/H grade, UD/SW package) share identical pinouts and electrical characteristics. The LTC2966IUD#TRPBF (–40°C to +85°C, 16-lead QFN) is functionally and physically interchangeable with LTC2966CUD#TRPBF (0°C to +70°C) and LTC2966HUD#TRPBF (–40°C to +125°C) on the same PCB layout, differing only in temperature qualification and marking.
LTC2966IUD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 16-QFN (3x3)
LTC2966IUD#TRPBF FAQ
1.How can I place an order for LTC2966IUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2966IUD#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 LTC2966IUD#TRPBF reliable?
The price and inventory of LTC2966IUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2966IUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2966IUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2966IUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2966IUD#TRPBF?
LTC2966IUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2966IUD#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 LTC2966IUD#TRPBF?
For technical support, including LTC2966IUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2966IUD#TRPBF requirements.
6.How does Aetrix verify that LTC2966IUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2966IUD#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 LTC2966IUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2966IUD#TRPBF?
All LTC2966IUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2966IUD#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 LTC2966IUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2966IUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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