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Analog Devices Inc. LTC2912HDDB-2#TRPBF
- Part No.:
- LTC2912HDDB-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912HDDB-2#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,959
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Product details
Overview
LTC2912HDDB-2#TRPBF from Analog Devices is a precision single-channel UV/OV voltage monitor IC designed for high-reliability power supply supervision in industrial and computing systems. It features ±1.5% threshold accuracy, 29µA quiescent current, adjustable 6–14ms reset timeout (H-grade), open-drain OV/UV outputs, and operates from 2.3V to 6V supply or up to 48V via internal 6.2V shunt regulator - used in 3.3V ±10% margining applications.
For engineers reviewing the LTC2912HDDB-2#TRPBF datasheet, LTC2912HDDB-2#TRPBF pinout, LTC2912HDDB-2#TRPBF application, or LTC2912HDDB-2#TRPBF equivalent, key selection criteria include its DIS-enabled output disable function, H-grade –40°C to 125°C operation, DFN-8 (3mm × 2mm) package with exposed pad, and guaranteed VCC ≥ 1V output validity for low-voltage brownout detection.
Technical Context
The LTC2912HDDB-2#TRPBF implements dual comparator-based monitoring with independent VH (undervoltage sense) and VL (overvoltage sense) inputs, each filtered to reject sub-500µs glitches. Its internal oscillator drives an adjustable timeout timer (TMR pin) that holds OV/UV assertion after fault clearance - programmable from 6ms to >1s via external capacitor.
This variant (LTC2912-2) integrates a dedicated DIS input (Pin 1) that disables both OV and UV outputs except during VCC undervoltage lockout (UVLO), enabling precise power-margining sequences. The H-grade temperature range (–40°C to 125°C), 55°C/W θJA thermal resistance, and GND-connected exposed pad support robust operation in thermally constrained embedded environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V to 6V direct; up to 48V with series resistor & internal 6.2V shunt regulator |
| Threshold Accuracy | ±1.5% over full –40°C to 125°C range - ensures reliable trip points under thermal stress |
| Quiescent Current | 29µA typical - enables always-on supervision in battery-backed or ultra-low-power systems |
| Reset Timeout Range | 6ms to 14ms (H-grade, CTMR = 1nF); scalable to seconds via larger TMR capacitor |
| VCC UVLO Threshold | 1.9V to 2.1V rising - guarantees valid reset assertion during brownout recovery |
| Input Leakage | ±15nA max (H-grade) at VH/VL - minimizes error in high-impedance resistive divider networks |
| Output Type | Open-drain OV/UV - supports wired-OR reset buses and level translation without external components |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN (DDB) with exposed thermal pad (Pin 9, GND). RoHS-compliant, lead-free finish. Thermal resistance θJA = 55°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIS) | Output Disable Control | Pulls high to disable OV/UV outputs (except during VCC UVLO); weak 2µA internal pull-down |
| 2 (UV) | Undervoltage Logic Output | Open-drain, asserts low when VH input falls below threshold; held low for timeout period |
| 3 (OV) | Overvoltage Logic Output | Open-drain, asserts low when VL input exceeds threshold; disabled when DIS = high |
| 4 (GND) | Ground Reference | Primary signal and power return; connects to exposed pad (Pin 9) |
| 5 (TMR) | Timeout Timer Input | Connects to external capacitor (≥10pF) to set reset pulse width; tie to VCC to bypass |
| 6 (VL) | Overvoltage Sense Input | Monitors low-side of resistive divider; triggers OV when voltage > 0.5V |
| 7 (VH) | Undervoltage Sense Input | Monitors high-side of resistive divider; triggers UV when voltage < 0.5V |
| 8 (VCC) | Supply Input / Shunt Regulator | Accepts 2.3–6V directly; regulates higher supplies (e.g., 12V/24V/48V) with external current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV Trip Points | Set via external 3-resistor divider - enables precise monitoring of any positive rail (e.g., 3.3V ±10%, 5V ±10%) |
| Glitch-Immune Inputs | Internal low-pass filtering rejects transients <500µs - eliminates false resets without adding hysteresis error |
| Margining Support | DIS pin allows controlled deactivation of OV/UV during voltage margin testing - critical for production validation |
| Low-Voltage Validity Guarantee | Outputs remain functional down to VCC = 1V - ensures reliable brownout detection in deep-sleep states |
| H-Temperature Grade | Specified from –40°C to +125°C - qualified for automotive under-hood, industrial motor control, and telecom infrastructure |
Applications
| Server Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Coordinating startup/shutdown of multi-rail server PSUs (12V, 5V, 3.3V) with precise timing margins. IC Role / Device Role / Timing Role: LTC2912HDDB-2#TRPBF monitors 3.3V core rail and disables reset assertion via DIS during controlled voltage ramp tests. Use Value: Enables automated margining without hardware rework - reduces qualification time by eliminating manual jumper changes. | Use Scenario: Supervising isolated 24V field power and 5V logic rails in programmable logic controller backplanes. IC Role / Device Role / Timing Role: LTC2912HDDB-2#TRPBF acts as primary UV/OV detector on 24V supply, asserting reset if voltage drops below 21.6V or exceeds 26.4V. Use Value: 29µA supply current extends uptime in battery-buffered operation; ±1.5% accuracy prevents nuisance trips in noisy factory environments. |
| Automotive ADAS Camera Module | Medical Imaging Power Subsystem |
Use Scenario: Ensuring clean power-up of 12V camera sensor and 1.8V image processor before initialization. IC Role / Device Role / Timing Role: LTC2912HDDB-2#TRPBF supervises 12V input with DIS tied to microcontroller GPIO to gate reset during firmware updates. Use Value: H-grade operation survives under-hood temperatures; 6.2V shunt regulator allows direct connection to unregulated 12V battery rail. | Use Scenario: Monitoring redundant 5V and 3.3V supplies powering FPGA-based image reconstruction engines. IC Role / Device Role / Timing Role: LTC2912HDDB-2#TRPBF provides independent UV/OV detection on 5V rail with 8.5ms timeout (CTMR = 1nF) to meet IEC 60601-1 hold-time requirements. Use Value: Open-drain outputs interface directly with medical-grade watchdog ICs; exposed pad ensures thermal stability during sustained imaging bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912IDDB-2#TRPBF | I-grade (–40°C to 85°C); identical electrical specs and pinout | Not rated for extended high-temp operation; unsuitable for under-hood or high-power industrial use | Select when ambient temperature stays ≤85°C and cost sensitivity outweighs thermal margin |
| LTC2912HDDB-1#TRPBF | LATCH pin instead of DIS; OV output latches low on overvoltage event | Lacks margining disable capability; requires external logic to clear latch during test modes | Choose only if system requires persistent OV fault indication until explicit reset command |
Compared with LTC2912IDDB-2#TRPBF, the LTC2912HDDB-2#TRPBF delivers extended thermal reliability for harsh environments; versus LTC2912HDDB-1#TRPBF, it replaces latch functionality with DIS-controlled margining - simplifying test automation and eliminating need for external reset circuitry.
Availability
LTC2912HDDB-2#TRPBF is available at Aetrix Electronics and suitable for server power sequencing, industrial PLC I/O modules, automotive ADAS camera modules, and medical imaging power subsystems requiring stable component supply across extended temperature ranges.
Supply support for LTC2912HDDB-2#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2912 product line delivers precision, low-power voltage supervision ICs optimized for multi-rail power integrity in space-constrained, thermally demanding applications - with variants supporting latch, disable, and non-inverting output configurations.
FAQ
What is the operating temperature range for the LTC2912HDDB-2#TRPBF?
The LTC2912HDDB-2#TRPBF is rated for –40°C to +125°C (H-grade), validated across this full range for threshold accuracy, timing, and output behavior. This makes it suitable for under-hood automotive, industrial motor drives, and telecom base station applications where ambient temperatures exceed 85°C. The DFN package's exposed pad must be soldered to PCB ground for thermal performance.
How does the DIS pin on the LTC2912HDDB-2#TRPBF function in margining applications?
The DIS pin (Pin 1) on the LTC2912HDDB-2#TRPBF disables both OV and UV outputs when pulled high, allowing controlled voltage margining without triggering system reset. During normal operation, DIS is left open (weak internal 2µA pull-down holds it low). When actively testing supply tolerance, a microcontroller pulls DIS high - suppressing reset assertion even if VH/VL thresholds are violated - then releases it to verify recovery behavior.
Can the LTC2912HDDB-2#TRPBF monitor voltages above 6V, and how is this implemented?
Yes, the LTC2912HDDB-2#TRPBF can monitor supplies up to 48V using its internal 6.2V shunt regulator on the VCC pin. A series current-limiting resistor (RZ) must be placed between the high-voltage source and VCC to restrict current to ≤10mA. For example, with a 48V supply, RZ ≥ (48V – 6.2V)/10mA = 4.18kΩ. The device then draws only 29µA quiescent current while regulating its own supply.
What is the minimum capacitor value required on the TMR pin of the LTC2912HDDB-2#TRPBF?
The TMR pin of the LTC2912HDDB-2#TRPBF requires a minimum external capacitor of 10pF to ground to ensure stable timeout operation. Values below 10pF may cause erratic or shortened reset pulses. Typical designs use 1nF for ~8.5ms (H-grade) or 22nF for ~200ms timeout. The pin must never be left floating - tie to VCC to bypass the timer entirely.
Does the LTC2912HDDB-2#TRPBF support open-drain wired-OR reset bus configurations?
Yes, the LTC2912HDDB-2#TRPBF provides true open-drain OV and UV outputs with strong internal pull-downs (typ. 50Ω) and weak VCC-referenced pull-ups (~400kΩ). This enables direct wired-OR connection of multiple supervisors onto a shared reset line - essential in multi-IC systems where any fault must assert a global reset. External pull-ups are optional and only needed for faster rise times or level translation.
LTC2912HDDB-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active High/Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2912HDDB-2#TRPBF FAQ
1.How can I place an order for LTC2912HDDB-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912HDDB-2#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 LTC2912HDDB-2#TRPBF reliable?
The price and inventory of LTC2912HDDB-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912HDDB-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2912HDDB-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912HDDB-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912HDDB-2#TRPBF?
LTC2912HDDB-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912HDDB-2#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 LTC2912HDDB-2#TRPBF?
For technical support, including LTC2912HDDB-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912HDDB-2#TRPBF requirements.
6.How does Aetrix verify that LTC2912HDDB-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912HDDB-2#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 LTC2912HDDB-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2912HDDB-2#TRPBF?
All LTC2912HDDB-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912HDDB-2#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 LTC2912HDDB-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC2912HDDB-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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