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Analog Devices Inc. ADM1811-5AKSZ-REEL
- Part No.:
- ADM1811-5AKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1811-5AKSZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,409
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Product details
Overview
ADM1811-5AKSZ-REEL from Analog Devices is a 3-pin SC70-packaged microprocessor reset circuit with active-low open-drain output and internal 5.5 kΩ pull-up resistor, designed to monitor 5 V supplies at a typical 4.62 V threshold with 150 ms reset timeout. It ensures safe system initialization in embedded controllers and industrial microprocessor systems by holding reset until power stabilizes.
For engineers reviewing the ADM1811-5AKSZ-REEL datasheet, ADM1811-5AKSZ-REEL pinout, ADM1811-5AKSZ-REEL application, or ADM1811-5AKSZ-REEL equivalent, key selection criteria include trip point accuracy (±0.13 V), ultra-low quiescent current (9–16 µA), open-drain compatibility with I²C-bus logic levels, and guaranteed operation across −40°C to +105°C.
Technical Context
The ADM1811-5AKSZ-REEL implements a precision voltage comparator with built-in hysteresis and a fixed 150 ms power-up reset delay timer. Its internal reference achieves ±1.5% trip point tolerance over temperature, and the open-drain output supports wired-OR configurations with external pull-ups or direct interface to microcontroller reset inputs requiring active-low assertion.
Unlike push-pull variants (e.g., ADM1810/ADM1812), this device uses an open-drain structure with integrated 5.5 kΩ pull-up, eliminating need for external components while maintaining compatibility with mixed-voltage systems. Reset assertion occurs when VCC falls below 4.62 V (typical), and release is delayed 150 ms after VCC rises above threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.62 V typical (4.50–4.75 V min/max); enables reliable 5 V supply monitoring with margin against ripple-induced false resets |
| Reset Timeout | 150 ms typical (100–250 ms range); guarantees sufficient power stabilization time before system release |
| Supply Current | 9–16 µA at 5.5 V; minimizes standby power impact in battery-backed or energy-sensitive designs |
| Output Type | Active-low open-drain with 5.5 kΩ internal pull-up; simplifies interface to diverse MCU reset pins without external resistors |
| Operating Temp | −40°C to +105°C; validated for industrial and automotive under-hood environments |
| Package | 3-lead SC70 (KS-3); 2.0 × 2.1 mm footprint saves PCB space vs. SOT-23 in high-density layouts |
| Reset Propagation | 10 µs falling edge response; ensures fast fault detection during brownout conditions |
Pinout & Package
ADM1811-5AKSZ-REEL is housed in a 3-lead SC70 (KS-3) package with gull-wing leads, compliant with EIAJ SC70 standards and RoHS-compliant (Z-suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Drives low during reset; floats high (pulled up internally) otherwise; compatible with 1.8–5.5 V logic domains |
| VCC | Monitored supply input | Connects directly to 5 V rail; no external decoupling required beyond standard 0.1 µF ceramic |
| GND | Ground reference | 0 V return path for both comparator and output stage; must be low-impedance for accurate threshold tracking |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pull-up resistor | 5.5 kΩ internal pull-up eliminates external component count and layout uncertainty for RST line termination |
| Precision trip point | ±1.5% threshold tolerance over full temperature range ensures consistent reset behavior across operating conditions |
| Ultra-low power consumption | Sub-16 µA supply current enables use in always-on monitoring circuits without compromising battery life |
| Fast fault response | 10 µs reset assertion on supply droop allows rapid system shutdown before logic corruption occurs |
| Industrial temp grade | Rated for −40°C to +105°C operation, supporting deployment in harsh environments without derating |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors main 5 V supply in programmable logic controller CPU board during cold start and transient load switching. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to ARM Cortex-M7 microcontroller until 5 V rail stabilizes within ±2% for ≥150 ms. Use Value: Prevents firmware execution from corrupted memory state during undervoltage; eliminates need for discrete RC reset network. | Use Scenario: Ensures deterministic boot of body control unit after vehicle ignition cycle, including jump-start and alternator load dump events. IC Role / Device Role / Timing Role: Resets Infineon AURIX TC3xx microcontroller upon 5 V supply drop below 4.62 V, with 150 ms hold-off to tolerate brief dips. Use Value: Guarantees clean startup after battery voltage recovery; internal pull-up avoids BOM cost and placement error of external resistor. |
| Medical Diagnostic Handheld | Smart Energy Meter |
Use Scenario: Provides fail-safe reset during battery-to-DC conversion in portable ultrasound probe with dual 3.3 V/5 V rails. IC Role / Device Role / Timing Role: Supervises 5 V analog front-end supply; asserts reset if voltage sags below 4.62 V due to high-current transducer pulse. Use Value: Maintains data integrity by halting ADC sampling during supply anomaly; 9 µA quiescent current extends battery runtime. | Use Scenario: Monitors isolated 5 V auxiliary supply powering metrology SoC and RTC in DIN-rail mounted electricity meter. IC Role / Device Role / Timing Role: Generates reset pulse to Renesas RL78/IoT microcontroller when 5 V rail drops during mains interruption or surge events. Use Value: Enables certified Class 0.5 accuracy retention via controlled reboot; SC70 package fits tight space behind LCD bezel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR31D3+T | 3.08 V reset threshold, SOT-23-3 package, 1.6 µA max supply current | Optimized for 3.3 V systems; not suitable for 5 V monitoring without external resistor divider | Select only if supervising sub-3.3 V rails where lower threshold and ultra-low current outweigh package size |
| TPS3808G18DBVR | 1.8 V threshold, adjustable delay, 1.1 µA typical supply current, SOT-23-6 | Requires external capacitor for timing; higher pin count increases layout complexity | Choose when programmable delay or multi-rail supervision is needed; avoid for fixed 5 V reset where simplicity is critical |
Compared with MAX6326XR31D3+T and TPS3808G18DBVR, the ADM1811-5AKSZ-REEL delivers exact 4.62 V trip point for 5 V systems, requires zero external components, and fits the smallest footprint-making it optimal for cost-sensitive, space-constrained industrial microcontroller designs.
Availability
ADM1811-5AKSZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical handheld diagnostics, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for ADM1811-5AKSZ-REEL 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 industrial, automotive, communications, and healthcare markets since 1965.
The ADM181x series was developed specifically for cost-effective, space-efficient microprocessor reset supervision in harsh-environment embedded systems-emphasizing precision threshold accuracy, wide temperature operation, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the ADM1811-5AKSZ-REEL?
The ADM1811-5AKSZ-REEL has a nominal reset threshold of 4.62 V, with a guaranteed range of 4.50 V (min) to 4.75 V (max) across −40°C to +105°C. This precise trip point is factory-trimmed and specified in Table 1 of the Rev. F datasheet, making it suitable for robust 5 V supply monitoring without external calibration.
Does the ADM1811-5AKSZ-REEL require an external pull-up resistor on the RST pin?
No, the ADM1811-5AKSZ-REEL includes an internal 5.5 kΩ pull-up resistor on the RST pin, as confirmed in Table 1 (Internal Pull-Up Resistor section) and Figure 14 of the datasheet. This eliminates the need for external components and reduces BOM count and PCB area in designs using this specific variant.
Can the ADM1811-5AKSZ-REEL be used to monitor a 3.3 V supply?
No-the ADM1811-5AKSZ-REEL is configured for 5 V monitoring with a 4.62 V threshold. For 3.3 V supply supervision, Analog Devices specifies the ADM1816-10AKSZ-REEL (2.88 V trip) or ADM1816-5AKSZ-REEL (3.06 V trip). Using ADM1811-5AKSZ-REEL on 3.3 V would result in permanent reset assertion.
What is the reset timeout duration of the ADM1811-5AKSZ-REEL after power-up?
The ADM1811-5AKSZ-REEL provides a fixed 150 ms reset timeout after VCC rises above the threshold, with a specified range of 100–250 ms (Table 1, RESET ACTIVE TIME). This delay ensures adequate power supply stabilization before releasing the microcontroller from reset, and is implemented entirely on-chip with no external timing components required.
Is the ADM1811-5AKSZ-REEL RoHS compliant and lead-free?
Yes-the "Z" suffix in ADM1811-5AKSZ-REEL explicitly denotes RoHS compliance and lead-free packaging, per the Ordering Guide footnote on Page 12 of the Rev. F datasheet. The SC70 package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements.
ADM1811-5AKSZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.62V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM1811-5AKSZ-REEL FAQ
1.How can I place an order for ADM1811-5AKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1811-5AKSZ-REEL 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 ADM1811-5AKSZ-REEL reliable?
The price and inventory of ADM1811-5AKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1811-5AKSZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM1811-5AKSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1811-5AKSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1811-5AKSZ-REEL?
ADM1811-5AKSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1811-5AKSZ-REEL 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 ADM1811-5AKSZ-REEL?
For technical support, including ADM1811-5AKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1811-5AKSZ-REEL requirements.
6.How does Aetrix verify that ADM1811-5AKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM1811-5AKSZ-REEL 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 ADM1811-5AKSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM1811-5AKSZ-REEL?
All ADM1811-5AKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1811-5AKSZ-REEL, 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 ADM1811-5AKSZ-REEL part is unused and in its original packaging.
Return procedure for ADM1811-5AKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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