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Analog Devices Inc. LTC2912IDDB-2#TRPBF
- Part No.:
- LTC2912IDDB-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912IDDB-2#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,714
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Product details
Overview
LTC2912IDDB-2#TRPBF from Analog Devices is a single-channel UV/OV voltage monitor IC with independent undervoltage and overvoltage detection, ±1.5% threshold accuracy, 29µA quiescent current, and adjustable 6–14ms reset timeout (CTMR = 1nF). It operates from 2.3V to 6V supply or higher via internal 6.2–7.3V shunt regulator and supports margining applications via DIS pin disable functionality.
For engineers reviewing the LTC2912IDDB-2#TRPBF datasheet, LTC2912IDDB-2#TRPBF pinout, LTC2912IDDB-2#TRPBF application, or LTC2912IDDB-2#TRPBF equivalent, this page delivers verified functional identity, DFN-8 package mapping, confirmed DIS/UV/OV/TMR/VH/VL pin roles, temperature-rated operation (–40°C to +85°C), and two validated alternative parts for system-level voltage supervision design.
Technical Context
The LTC2912IDDB-2#TRPBF implements dual comparator-based monitoring: VH input triggers UV when below 0.5V, VL input triggers OV when above 0.5V. Both inputs include low-pass filtering for glitch immunity without added hysteresis error. The TMR pin sets timeout via external capacitor (9ms/nF), and DIS pin disables both UV and OV outputs except during VCC UVLO.
Its internal VCC shunt regulator (6.2–7.3V, ±200mV load regulation) enables direct connection to 12V/24V/48V rails with series resistor limiting ICC ≤ 10mA. Guaranteed operation down to VCC = 1V ensures reliable power-up reset assertion before full supply stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V–6V direct; up to 48V with external series resistor and internal 6.2–7.3V shunt regulator |
| Threshold Accuracy | ±1.5% over –40°C to +85°C - enables precise 3.3V ±10% monitoring with <±15mV error budget |
| Quiescent Current | 29µA typical - supports always-on supervision in battery-backed or low-power systems |
| UV/OV Timeout | 6–14ms (CTMR = 1nF) - programmable delay ensures stable post-fault reset pulse width |
| Output Type | Open-drain UV and OV - allows wired-OR reset bus sharing across multiple supervisors |
| VCC UVLO Threshold | 1.9–2.1V with 5–50mV hysteresis - guarantees clean power-up reset before logic initialization |
| Input Glitch Immunity | Filter-integrated comparator outputs - rejects sub-500µs transients without compromising trip point accuracy |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN (DDB), exposed pad (Pin 9) connected to GND. Thermal resistance θJA = 55°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIS) | Output Disable Control | Pulls high to disable UV/OV outputs (except during VCC UVLO); weak 2µA internal pull-down |
| 2 (UV) | Undervoltage Logic Output | Open-drain, asserts low when VH < 0.5V; held low for programmed timeout after recovery |
| 3 (OV) | Overvoltage Logic Output | Open-drain, asserts low when VL > 0.5V; disabled when DIS = high |
| 4 (GND) | Ground Reference | Primary return path for internal circuitry and external bypass capacitor (0.1µF minimum) |
| 5 (TMR) | Reset Timeout Timer | Connects to GND via CTMR (≥10pF) to set 9ms/nF timeout; tie to VCC to bypass timer |
| 6 (VL) | Overvoltage Sense Input | Monitors low-side divider tap; >0.5V triggers OV; tie to GND if unused |
| 7 (VH) | Undervoltage Sense Input | Monitors high-side divider tap; <0.5V triggers UV; tie to VCC if unused |
| 8 (VCC) | Supply Input / Shunt Regulator | Accepts 2.3–6V directly; regulates >6V supplies with max 10mA input current |
Key Features
| Feature | Design Value |
|---|---|
| Independent UV/OV Detection | Separate VH and VL inputs enable asymmetric trip points (e.g., 3.3V ±10%) without shared resistor networks |
| Margining Support | DIS pin allows dynamic enable/disable of supervision during production test or voltage margining sequences |
| Glitch-Immune Sensing | Integrated comparator filtering eliminates need for external RC filters while preserving ±1.5% threshold accuracy |
| Wide Supply Compatibility | Internal shunt regulator permits direct 48V rail connection with only one series resistor - no external LDO required |
| Low-VCC Operation Guarantee | UV asserts at VCC ≥ 1V - ensures reset generation even during brown-out or slow-ramp power-up |
Applications
| Server Power Sequencing | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitoring 12V backplane supply and 3.3V FPGA core rail in rack-mounted network servers. IC Role / Device Role / Timing Role: LTC2912IDDB-2#TRPBF provides independent UV/OV fault detection on each rail with programmable timeout to coordinate sequenced power-up. Use Value: Prevents FPGA configuration errors by holding reset until both rails stabilize within ±10% tolerance for ≥8.5ms. |
Use Scenario: Supervising isolated 24V field power and 5V logic supply in programmable logic controller I/O modules. IC Role / Device Role / Timing Role: LTC2912IDDB-2#TRPBF detects undervoltage on 24V field supply and overvoltage on 5V logic rail using separate resistive dividers. Use Value: Enables safe shutdown before field-side transients damage digital isolators - open-drain outputs interface directly with optocoupler inputs. |
| Medical Imaging Power Subsystem | Automotive Infotainment Head Unit |
|
Use Scenario: Validating ±15V analog supply and 1.8V ADC reference in MRI signal chain boards. IC Role / Device Role / Timing Role: LTC2912IDDB-2#TRPBF monitors positive rail with VL/VH inputs; DIS pin used during calibration mode to suspend supervision. Use Value: ±1.5% threshold accuracy ensures analog subsystem remains powered only within strict 1.8V ±30mV spec - critical for 16-bit ADC linearity. |
Use Scenario: Supervising 5V USB-C PD input and 3.3V SoC supply in automotive infotainment head units. IC Role / Device Role / Timing Role: LTC2912IDDB-2#TRPBF detects overvoltage on 5V rail (e.g., 5.5V surge) and undervoltage on 3.3V rail (e.g., 2.97V dropout). Use Value: 29µA quiescent current meets automotive "off-mode" leakage requirements while maintaining fail-safe reset assertion during cold-crank events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912IDDB-1#TRPBF | Includes LATCH pin instead of DIS; OV output latches low on fault and requires external clear signal | Suitable for systems requiring persistent fault indication until manual or software reset | Select LTC2912IDDB-1#TRPBF when latch-hold behavior is needed instead of margining-disable capability |
| LTC2912IDDB-3#TRPBF | Noninverting OV output (asserts high) with LATCH pin; no DIS functionality | Required where active-high reset signaling or wired-OR with other high-drive sources is mandatory | Choose LTC2912IDDB-3#TRPBF when system logic expects active-high OV assertion and latch control is preferred over disable |
Compared with LTC2912IDDB-2#TRPBF, the -1 variant trades margining disable for latch persistence, while the -3 variant replaces disable with noninverting OV and latch - all share identical DFN-8 package, ±1.5% accuracy, and 29µA quiescent current, enabling drop-in replacement with only pin function reassignment.
Availability
LTC2912IDDB-2#TRPBF is available at Aetrix Electronics and suitable for server power sequencing, industrial PLC I/O modules, medical imaging power subsystems, and automotive infotainment head units requiring stable component supply with guaranteed –40°C to +85°C operation.
Supply support for LTC2912IDDB-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and healthcare markets.
The LTC2912 family delivers micropower, space-conscious voltage supervision for systems demanding precise UV/OV thresholds, glitch immunity, and flexible timeout control - optimized for computing, networking, and embedded power integrity applications.
FAQ
What is the operating temperature range for LTC2912IDDB-2#TRPBF?
LTC2912IDDB-2#TRPBF is rated for –40°C to +85°C ambient operation (I-grade), validated across full electrical specifications including ±1.5% threshold accuracy and 29µA quiescent current. This range supports deployment in industrial PLCs, automotive infotainment, and telecom equipment without derating.
How does the DIS pin function in LTC2912IDDB-2#TRPBF?
In LTC2912IDDB-2#TRPBF, the DIS pin (Pin 1) disables both UV and OV outputs when pulled high - forcing them into high-impedance state with weak internal pull-up to VCC. During VCC undervoltage lockout (UVLO), UV still asserts low regardless of DIS state, ensuring fail-safe reset during supply collapse.
Can LTC2912IDDB-2#TRPBF monitor a 48V supply directly?
Yes - LTC2912IDDB-2#TRPBF uses an internal 6.2–7.3V shunt regulator on the VCC pin. To connect to 48V, add a series current-limiting resistor sized to keep input current ≤10mA (e.g., 3.8kΩ for 48V → 6.5V drop). No external LDO or regulator is required.
What is the minimum capacitor value for the TMR pin in LTC2912IDDB-2#TRPBF?
The TMR pin in LTC2912IDDB-2#TRPBF requires a minimum 10pF capacitor to ground for stable timeout operation. Values below 10pF may cause erratic timing; larger values scale timeout linearly (9ms/nF). Tying TMR to VCC bypasses the timer entirely, producing immediate output response.
Does LTC2912IDDB-2#TRPBF support asymmetric UV and OV thresholds?
Yes - LTC2912IDDB-2#TRPBF uses separate VH (UV sense) and VL (OV sense) inputs, each referenced to a fixed 0.5V internal threshold. By configuring independent resistor dividers on VH and VL, users achieve fully independent UV and OV trip points - e.g., 3.3V −10% (2.97V) and +10% (3.63V) simultaneously.
LTC2912IDDB-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2912IDDB-2#TRPBF FAQ
1.How can I place an order for LTC2912IDDB-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912IDDB-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 LTC2912IDDB-2#TRPBF reliable?
The price and inventory of LTC2912IDDB-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 LTC2912IDDB-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2912IDDB-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912IDDB-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912IDDB-2#TRPBF?
LTC2912IDDB-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912IDDB-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 LTC2912IDDB-2#TRPBF?
For technical support, including LTC2912IDDB-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912IDDB-2#TRPBF requirements.
6.How does Aetrix verify that LTC2912IDDB-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912IDDB-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 LTC2912IDDB-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2912IDDB-2#TRPBF?
All LTC2912IDDB-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912IDDB-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 LTC2912IDDB-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC2912IDDB-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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