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Analog Devices Inc. ADM1812-5AKSZ-REEL
- Part No.:
- ADM1812-5AKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1812-5AKSZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,101
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Product details
Overview
ADM1812-5AKSZ-REEL from Analog Devices is a 5 V microprocessor reset circuit with active-high push-pull output, 4.62 V typical reset threshold, 150 ms reset timeout, and SC70-3 package. It monitors power supply integrity during startup and brownout conditions in embedded controllers and industrial microprocessor systems.
For engineers reviewing the ADM1812-5AKSZ-REEL datasheet, ADM1812-5AKSZ-REEL pinout, ADM1812-5AKSZ-REEL application, or ADM1812-5AKSZ-REEL equivalent, key selection criteria include reset polarity (active-high), trip point tolerance (±0.13 V), operating temperature range (−40°C to +105°C), ultra-low quiescent current (9–16 µA), and compatibility with 5 V logic interfaces without external components.
Technical Context
The ADM1812-5AKSZ-REEL integrates a precision voltage reference, comparator, and 150 ms delay timer to ensure safe system initialization after power-up. Its internal hysteresis prevents false resets during marginal supply conditions.
This device operates across the full industrial temperature range and features a push-pull output stage capable of sourcing 350 µA when reset is deasserted and sinking 8 mA when asserted - enabling direct connection to most µP reset inputs without pull-up resistors or level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.62 V typical (4.50–4.75 V min/max); ensures reliable detection of 5 V supply drop below operational margin. |
| Reset Timeout | 150 ms typical (100–250 ms); guarantees stable power before releasing microprocessor from reset state. |
| Supply Voltage Range | 1.2 V to 5.5 V; supports operation even during deep brownout while maintaining reset assertion. |
| Quiescent Current | 9–16 µA at 5.5 V; enables low-power system monitoring without significant battery drain. |
| Output Type | Active-high push-pull; eliminates need for external pull-up resistor and simplifies interface to µP reset pins. |
| Operating Temperature | −40°C to +105°C; qualified for industrial and automotive under-hood applications. |
| Package | SC70-3 (KS-3); 2.0 × 2.1 mm footprint ideal for space-constrained PCB layouts. |
Pinout & Package
ADM1812-5AKSZ-REEL uses a 3-lead SC70 (KS-3) package with gull-wing leads and 0.65 mm pitch. The package measures 2.00 mm × 2.10 mm × 0.95 mm and complies with EIAJ SC70 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-high reset output | Drives high when VCC ≥ threshold; remains high for 150 ms after VCC rises above threshold - directly compatible with µP reset inputs requiring active-high assertion. |
| 2 (VCC) | Supply voltage input | Monitored rail; device draws only 9–16 µA and operates down to 1.2 V - maintains reset assertion during severe brownout. |
| 3 (GND) | Ground reference | 0 V return path for all internal circuitry; must be connected to system ground plane for accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.62 V ±0.13 V ensures consistent 5 V supply monitoring across temperature and process variation. |
| Guaranteed 150 ms reset timeout | Prevents premature release from reset until power stabilizes - critical for flash programming and PLL lock sequences. |
| Push-pull output architecture | Eliminates external pull-up resistor and reduces BOM count; supports direct drive of µP reset pins with no additional components. |
| Ultra-low supply current | 9 µA minimum at 3.6 V enables use in always-on monitoring circuits without compromising battery life. |
| Industrial temperature range | −40°C to +105°C operation validated per AEC-Q100 stress test conditions for reliability in harsh environments. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 5 V supply rail powering MCU, CAN transceiver, and I/O drivers in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Active-high reset supervisor ensuring safe boot sequence after AC line interruption or transient voltage sag. Use Value: Prevents corrupted firmware execution by enforcing 150 ms stabilization window before releasing reset - eliminating watchdog timeouts and memory corruption. |
Use Scenario: Integrated into body control unit (BCU) to supervise main 5 V domain powering microcontroller and LIN transceivers. IC Role / Device Role / Timing Role: Voltage monitor with guaranteed reset hold time during cold-cranking and load-dump events. Use Value: Maintains reset assertion down to 1.2 V supply, surviving engine cranking dips below 3 V - ensuring deterministic restart after ignition cycle. |
| Medical Diagnostic Handheld | Smart Energy Meter |
Use Scenario: Ensures reliable power-on reset for ARM Cortex-M based diagnostic instrument powered from rechargeable Li-ion battery with buck-boost regulator. IC Role / Device Role / Timing Role: Low-current (9 µA) reset supervisor enabling long standby battery life while guaranteeing clean boot on wake-up. Use Value: Eliminates need for external RC timing network - reducing component count and PCB area in compact handheld enclosure. |
Use Scenario: Supervises 5 V rail derived from isolated DC/DC converter in revenue-grade electricity meter operating in outdoor utility cabinets. IC Role / Device Role / Timing Role: Industrial-grade reset IC with −40°C to +105°C qualification and tight 4.62 V threshold for stable meter firmware initialization. Use Value: Prevents erroneous energy accumulation during power recovery by enforcing strict 150 ms reset hold - meeting IEC 62053 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63 V threshold, SOT-23-3 package, 140 ms reset timeout, 1.2–5.5 V supply range | Same 5 V monitoring function but slightly shorter timeout; requires external pull-up for open-drain output | Select when SOT-23 footprint is preferred and 140 ms timeout meets system timing budget. |
| TPS3808G01DBVR | 4.63 V threshold, adjustable delay via capacitor, 1.2–6.8 V supply, 1.6 µA typical IQ | Programmable timeout and lower quiescent current, but requires external capacitor and has different pinout | Choose when design flexibility in reset duration is needed or ultra-low IQ (<2 µA) is mandatory for battery-powered systems. |
Compared with MAX809SEUR+T and TPS3808G01DBVR, the ADM1812-5AKSZ-REEL offers fixed 150 ms timeout with push-pull output - reducing external component count and simplifying layout, while maintaining industrial temperature rating and tight threshold accuracy for deterministic 5 V system reset behavior.
Availability
ADM1812-5AKSZ-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 and long-term lifecycle support.
Supply support for ADM1812-5AKSZ-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.
The ADM181x series was designed specifically for cost-sensitive, space-constrained microprocessor reset supervision - delivering precision voltage monitoring, guaranteed reset timing, and robust operation across extended temperature ranges in minimal SC70 and SOT-23 footprints.
FAQ
What is the reset threshold voltage of the ADM1812-5AKSZ-REEL?
The ADM1812-5AKSZ-REEL has a nominal reset threshold of 4.62 V, with a specified range of 4.50 V (min) to 4.75 V (max) over the full −40°C to +105°C temperature range. This precise trip point ensures reliable detection of 5 V supply droop while avoiding false triggers due to noise or ripple.
Does the ADM1812-5AKSZ-REEL require an external pull-up resistor?
No, the ADM1812-5AKSZ-REEL features an active-high push-pull output stage that drives high when reset is deasserted and low when asserted. Unlike open-drain supervisors, it does not require an external pull-up resistor - simplifying design and reducing BOM count.
What is the reset timeout duration for the ADM1812-5AKSZ-REEL?
The ADM1812-5AKSZ-REEL provides a guaranteed reset timeout of 150 ms (typical), with a specified range of 100 ms to 250 ms. This delay ensures the monitored 5 V supply has stabilized before releasing the microprocessor from reset - critical for reliable firmware initialization.
Is the ADM1812-5AKSZ-REEL RoHS compliant?
Yes, the "Z" suffix in ADM1812-5AKSZ-REEL indicates RoHS compliance per EU Directive 2011/65/EU. The device is lead-free, halogen-free, and manufactured using Analog Devices' qualified green packaging process.
Can the ADM1812-5AKSZ-REEL operate with supply voltages below 5 V?
Yes, the ADM1812-5AKSZ-REEL operates from 1.2 V to 5.5 V. While optimized for 5 V supply monitoring, it remains functional and asserts reset down to 1.2 V - making it suitable for brownout detection in systems with wide-input DC/DC converters or battery-backed rails.
ADM1812-5AKSZ-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:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM1812-5AKSZ-REEL FAQ
1.How can I place an order for ADM1812-5AKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1812-5AKSZ-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 ADM1812-5AKSZ-REEL reliable?
The price and inventory of ADM1812-5AKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1812-5AKSZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM1812-5AKSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1812-5AKSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1812-5AKSZ-REEL?
ADM1812-5AKSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1812-5AKSZ-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 ADM1812-5AKSZ-REEL?
For technical support, including ADM1812-5AKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1812-5AKSZ-REEL requirements.
6.How does Aetrix verify that ADM1812-5AKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM1812-5AKSZ-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 ADM1812-5AKSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM1812-5AKSZ-REEL?
All ADM1812-5AKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1812-5AKSZ-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 ADM1812-5AKSZ-REEL part is unused and in its original packaging.
Return procedure for ADM1812-5AKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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