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Analog Devices Inc. ADM803LAKS-REEL7
- Part No.:
- ADM803LAKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM803LAKS-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,748
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Product details
Overview
ADM803LAKS-REEL7 from Analog Devices is a microprocessor supervisory circuit with open-drain active-low RESET output, 4.63 V reset threshold, −40°C to +125°C operating temperature range, 17 μA supply current, and SC70-3 package. It monitors VCC in power-up, power-down, and brownout conditions for embedded microcontroller systems requiring reliable low-voltage reset assertion down to 1 V.
For engineers reviewing the ADM803LAKS-REEL7 datasheet, ADM803LAKS-REEL7 pinout, ADM803LAKS-REEL7 application, or ADM803LAKS-REEL7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), 240 ms typical reset timeout, open-drain output compatibility with mixed-voltage logic, and SC70 footprint constraints in space-constrained industrial controllers.
Technical Context
The ADM803LAKS-REEL7 integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reset assertion remains valid even as VCC drops to 1.0 V, enabling robust brownout detection in wide-input industrial power rails.
Unlike push-pull variants (ADM809/ADM810), the ADM803LAKS-REEL7 uses an open-drain RESET output requiring an external pull-up resistor-enabling wired-OR configurations and level translation across 1.8 V to 5 V logic domains without additional interface circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V (typical at 25°C); ±2.5% tolerance over −40°C to +125°C ensures reliable 5 V rail monitoring despite thermal drift. |
| Supply Current | 17 μA (typical at VCC < 3.6 V, −40°C to +85°C); enables multi-year battery operation in portable instrumentation. |
| Reset Timeout | 240 ms (typical); holds microprocessor in reset long enough for power supply stabilization and clock circuit lock. |
| VCC Operating Range | 1.0 V to 5.5 V; supports reset assertion during deep brownout events where core logic may still be functional. |
| Output Type | Open-drain active-low RESET; allows flexible pull-up to any logic rail and supports multiple devices sharing one reset line. |
| Temperature Range | −40°C to +125°C; qualified for under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| Package | 3-lead SC70 (KS-3); 2.0 mm × 2.1 mm footprint with 0.65 mm pitch-ideal for high-density PCB layouts. |
Pinout & Package
ADM803LAKS-REEL7 is housed in a 3-lead SC70 (KS-3) package with gull-wing leads, JEDEC-compliant outline, and 0.65 mm lead pitch. Thermal impedance is 146°C/W (θJA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and timer; must be connected directly to system ground plane for noise immunity. |
| 2 | RESET | Open-drain active-low output; requires external pull-up resistor (typically 10 kΩ) to target logic rail (e.g., 3.3 V or 5 V). |
| 3 | VCC | Monitored supply input; powers internal circuitry and serves as reference for reset threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.63 V ±2.5% over full temperature range eliminates need for external trimming in 5 V systems. |
| Ultra-low quiescent current | 17 μA typical enables use in always-on subsystems without compromising battery life. |
| Brownout detection down to 1 V | Guarantees reset assertion even during severe undervoltage events before MCU enters undefined state. |
| Glitch-immune comparator | Rejects transients up to 100 mV overdrive for ≥200 µs-prevents spurious resets from switching noise. |
| SC70-3 footprint | 2.0 mm × 2.1 mm area saves >40% board space vs. SOT-23-3 while maintaining reflow compatibility. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 5 V microcontroller supply in programmable logic controller cabinets exposed to wide ambient temperature swings and EMI-rich factory environments. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET during cold cranking (VCC dip to 1.8 V) and hot restarts (125°C junction). Use Value: Prevents firmware corruption by guaranteeing 240 ms minimum reset hold time after VCC recovers above 4.63 V. |
Use Scenario: Embedded in door module ECUs where 5 V rail is derived from vehicle battery via LDO, subject to load dump and jump-start transients. IC Role / Device Role / Timing Role: Voltage monitor with open-drain output tied to shared reset bus across multiple MCUs and CAN transceivers. Use Value: Enables single-point reset coordination without level-shifting components due to open-drain architecture. |
| Medical Infusion Pump | Smart Energy Meter |
|
Use Scenario: Ensures fail-safe shutdown of motor drivers and display controller when main 3.3 V supply sags during battery switchover. IC Role / Device Role / Timing Role: Low-power supervisor asserting RESET until regulated 3.3 V rail stabilizes post-battery insertion. Use Value: 17 μA supply current extends backup battery life beyond 5 years in standby mode per IEC 60601 requirements. |
Use Scenario: Monitors auxiliary 5 V supply powering metrology ASIC and real-time clock in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Brownout detector maintaining RESET assertion during grid voltage dips below 190 VAC (causing VCC drop to ~4.2 V). Use Value: Reset threshold of 4.63 V provides 300 mV noise margin against ripple-induced false triggers on noisy SMPS outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM809LAKSZ-REEL7 | Push-pull active-low RESET output; same 4.63 V threshold and SC70-3 package. | Eliminates need for external pull-up but cannot be wire-OR'd with other reset sources. | Select when driving a dedicated MCU reset pin without shared bus requirements. |
| TPS3808G01DBVR | 4.63 V threshold, 350 ms reset timeout, SOT-23-6 package, 2.5 μA quiescent current. | Higher accuracy (0.5% threshold tolerance) but larger footprint and no 1 V operation capability. | Select when ultra-low power dominates design priorities and extended reset timing is acceptable. |
Compared with ADM803LAKS-REEL7, ADM809LAKSZ-REEL7 simplifies BOM by removing the pull-up resistor but sacrifices bus-sharing flexibility; TPS3808G01DBVR reduces current draw by 90% but increases board area by 3× and loses sub-1.2 V reset functionality critical for brownout resilience.
Availability
ADM803LAKS-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM803LAKS-REEL7 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, headquartered in Norwood, MA.
The ADM803/ADM809/ADM810 family was designed specifically for microprocessor reset supervision in harsh environments-emphasizing low power, wide VCC range, and guaranteed reset behavior down to 1 V for mission-critical embedded systems.
FAQ
What is the reset timeout duration for ADM803LAKS-REEL7?
The ADM803LAKS-REEL7 provides a typical reset timeout of 240 ms after VCC rises above the 4.63 V threshold. This value varies from 140 ms to 460 ms across −40°C to +85°C and from 100 ms to 840 ms at 85°C to 125°C, ensuring sufficient hold time for power supply stabilization in all operating conditions. The ADM803LAKS-REEL7 timer is internally generated and does not require external components.
Does ADM803LAKS-REEL7 support operation below 1.8 V?
Yes, ADM803LAKS-REEL7 guarantees RESET assertion down to VCC = 1.0 V, as specified in the Absolute Maximum Ratings and General Description sections. This enables reliable brownout detection in systems where the monitored rail collapses gradually, such as during battery discharge or unregulated input failure. Operation below 1.0 V is not functional.
What external components are required for ADM803LAKS-REEL7?
ADM803LAKS-REEL7 requires only one external component: a pull-up resistor on the open-drain RESET pin. A 10 kΩ resistor to the target logic rail (e.g., 3.3 V or 5 V) is typical. No capacitors, resistors, or voltage dividers are needed for basic operation-the ADM803LAKS-REEL7 integrates precision reference, comparator, and timer functions internally.
How does ADM803LAKS-REEL7 differ from ADM809LAKSZ-REEL7?
ADM803LAKS-REEL7 features an open-drain RESET output requiring an external pull-up, while ADM809LAKSZ-REEL7 uses a push-pull output capable of actively driving high and low. Both share identical 4.63 V threshold, SC70-3 package, and −40°C to +125°C rating. The ADM803LAKS-REEL7 enables wired-OR reset buses; ADM809LAKSZ-REEL7 simplifies layout but prevents shared reset lines.
Is ADM803LAKS-REEL7 RoHS compliant?
Yes, ADM803LAKS-REEL7 is RoHS compliant, as indicated by the "Z" suffix in the ordering code per the manufacturer's Ordering Guide. It meets EU Directive 2011/65/EU and contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE).
ADM803LAKS-REEL7 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:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM803LAKS-REEL7 FAQ
1.How can I place an order for ADM803LAKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM803LAKS-REEL7 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 ADM803LAKS-REEL7 reliable?
The price and inventory of ADM803LAKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM803LAKS-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM803LAKS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM803LAKS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM803LAKS-REEL7?
ADM803LAKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM803LAKS-REEL7 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 ADM803LAKS-REEL7?
For technical support, including ADM803LAKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM803LAKS-REEL7 requirements.
6.How does Aetrix verify that ADM803LAKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM803LAKS-REEL7 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 ADM803LAKS-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM803LAKS-REEL7?
All ADM803LAKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM803LAKS-REEL7, 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 ADM803LAKS-REEL7 part is unused and in its original packaging.
Return procedure for ADM803LAKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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