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Analog Devices Inc. ADM803LAKSZ-REEL
- Part No.:
- ADM803LAKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM803LAKSZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,638
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Product details
Overview
ADM803LAKSZ-REEL 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, and 3-lead SC70 (KS-3) package. It monitors VCC in power-up, power-down, and brownout conditions and asserts reset down to 1 V VCC for ≥240 ms typical timeout.
For engineers reviewing the ADM803LAKSZ-REEL datasheet, ADM803LAKSZ-REEL pinout, ADM803LAKSZ-REEL application, or ADM803LAKSZ-REEL equivalent, key selection factors include reset threshold accuracy (±1.5% over temperature), ultra-low 17 μA supply current, open-drain output requiring external pull-up, SC70 footprint compatibility, and guaranteed operation down to 1 V VCC.
Technical Context
The ADM803LAKSZ-REEL implements a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timeout timer. Its reference circuit maintains ±1.5% threshold accuracy across −40°C to +125°C, enabling reliable reset assertion during fast transients and brownouts.
As an open-drain variant in the ADM803 family, it requires an external pull-up resistor on RESET to interface with CMOS/TTL logic. Unlike push-pull variants (ADM809/ADM810), it supports wired-OR configurations and level translation via the pull-up voltage source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V (typical at 25°C); ±1.5% tolerance over −40°C to +125°C ensures robust detection of 5 V supply undervoltage |
| Supply Current | 17 μA (typical at VCC < 3.6 V, −40°C to +85°C); enables battery-powered and low-power embedded systems |
| VCC Operating Range | 1.0 V to 5.5 V; guarantees RESET assertion integrity even during deep brownout or partial power loss |
| Reset Timeout | 240 ms (typical); holds microprocessor in reset until power stabilizes, preventing premature execution |
| Output Type | Open-drain active-low RESET; requires external pull-up; supports multi-source reset arbitration and voltage-level flexibility |
| Reset Output Low Voltage | 0.3 V at 1.2 mA sink (VCC = VTH min); ensures clean logic-low signal to compatible microcontrollers |
| Temperature Range | −40°C to +125°C; qualified for automotive under-hood, industrial control, and harsh-environment applications |
Pinout & Package
ADM803LAKSZ-REEL uses a 3-lead SC70 (KS-3) package - 2.00 mm × 2.10 mm × 0.95 mm body, 0.65 mm pitch - optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground Reference | 0 V return path for internal comparator and timer; must be connected to system ground plane for noise immunity |
| RESET (Pin 2) | Open-Drain Active-Low Output | Sinks current when asserted; requires external pull-up resistor (typically 10 kΩ) to define logic-high voltage level |
| VCC (Pin 3) | Supply Input | Monitored voltage rail; powers internal circuitry and determines reset assertion point based on 4.63 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.63 V with ±1.5% max deviation over full temperature range ensures deterministic reset timing in 5 V systems |
| Ultra-low quiescent current | 17 μA typical enables >10-year battery life in always-on monitoring applications |
| Brownout immunity | Operates down to 1 V VCC and asserts reset during slow-ramp power failures, preventing corrupted firmware execution |
| Glitch-immune comparator | Rejects transients ≤100 μs duration at up to 100 mV overdrive, eliminating false resets from switching noise |
| SC70 footprint | 3-lead KS-3 package saves >40% board area vs. SOT-23 while maintaining reflow compatibility and thermal performance |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 5 V supply rail powering MCU and I/O drivers in programmable logic controllers exposed to wide ambient temperatures and EMI. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET during cold cranking (VCC dip to 2.8 V) and hot restart (125°C ambient). Use Value: Prevents erratic I/O behavior and firmware corruption by guaranteeing 240 ms minimum reset hold time after VCC recovers above 4.63 V. | Use Scenario: Embedded in door module PCB to supervise 5 V rail feeding CAN transceiver and window motor driver ICs. IC Role / Device Role / Timing Role: Open-drain RESET output tied to shared reset bus with other modules; pulls bus low during battery voltage sag below 4.63 V. Use Value: Enables synchronized system-wide reset without additional logic, leveraging wired-OR capability and 1 V operational floor. |
| Medical Infusion Pump | Energy Meter with Tamper Detection |
Use Scenario: Ensures safe startup and fault recovery in battery-backed infusion pump controller operating at −20°C to +70°C. IC Role / Device Role / Timing Role: Resets ARM Cortex-M0+ MCU if main 3.3 V LDO output drops due to capacitor aging or load surge. Use Value: 17 μA supply current extends primary battery life; ±1.5% threshold stability prevents nuisance resets during normal voltage ripple. | Use Scenario: Supervises auxiliary 5 V rail powering real-time clock and tamper-detection comparators in smart electricity meters. IC Role / Device Role / Timing Role: Generates reset pulse upon AC mains interruption or meter cover removal (via switch-induced VCC dip). Use Value: Glitch-immune comparator ignores ESD events and relay bounce; 240 ms timeout ensures RTC registers fully initialize before data logging resumes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM809LAKSZ-REEL | Push-pull active-low RESET output; no external pull-up required; same 4.63 V threshold and SC70 package | Eliminates BOM component count but lacks wired-OR capability; unsuitable for shared reset buses | Select when simplifying layout and interfacing with single-load microcontrollers only |
| MAX809LTRD1T | 4.63 V threshold, SOT-23-3 package, 1.2 μA max supply current, but only rated to +85°C (not +125°C) | Limited to commercial/industrial environments; insufficient for under-hood automotive use | Select for cost-sensitive, non-automotive applications where extended temperature is not required |
Compared with ADM809LAKSZ-REEL, the ADM803LAKSZ-REEL trades pull-up simplicity for system-level reset arbitration flexibility; compared with MAX809LTRD1T, it delivers guaranteed operation at 125°C and higher threshold accuracy-critical for automotive and industrial reliability.
Availability
ADM803LAKSZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADM803LAKSZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADM803 series belongs to Analog Devices' precision supervisory IC product line, engineered specifically for fail-safe power monitoring in mission-critical microprocessor systems where deterministic reset behavior under voltage stress is mandatory.
FAQ
What is the reset threshold voltage of the ADM803LAKSZ-REEL and how stable is it over temperature?
The ADM803LAKSZ-REEL has a nominal reset threshold of 4.63 V at 25°C, with a maximum deviation of ±1.5% across its full operating range of −40°C to +125°C. This stability is achieved via a trimmed bandgap reference and on-chip temperature compensation, ensuring consistent reset behavior in automotive and industrial environments where supply rails experience thermal drift.
Does the ADM803LAKSZ-REEL require an external pull-up resistor on the RESET pin?
Yes, the ADM803LAKSZ-REEL features an open-drain RESET output and requires an external pull-up resistor-typically 4.7 kΩ to 10 kΩ-to the target logic voltage (e.g., 3.3 V or 5 V). Without this resistor, the RESET signal cannot achieve a valid logic-high state, compromising system initialization integrity.
Can the ADM803LAKSZ-REEL operate reliably when VCC drops below 2 V?
Yes, the ADM803LAKSZ-REEL remains functional and asserts RESET down to VCC = 1.0 V, as confirmed in the Absolute Maximum Ratings and General Description sections. This capability ensures robust brownout detection even during severe power sags, such as those occurring during automotive cold-cranking or capacitor discharge events.
What is the typical reset timeout duration for the ADM803LAKSZ-REEL and is it adjustable?
The ADM803LAKSZ-REEL provides a fixed 240 ms typical reset timeout after VCC rises above the 4.63 V threshold. This duration is internally generated and not user-adjustable; it is designed to exceed typical microprocessor power stabilization times and is guaranteed across temperature per the datasheet's RESET ACTIVE TIMEOUT PERIOD specification.
How does the ADM803LAKSZ-REEL differ from the ADM809LAKSZ-REEL in terms of output configuration and system integration?
The ADM803LAKSZ-REEL uses an open-drain RESET output, requiring an external pull-up and enabling wired-OR reset busing with other supervisors. In contrast, the ADM809LAKSZ-REEL uses a push-pull output that drives both high and low without external components-simplifying design but preventing shared reset line usage. Both share identical threshold, temperature range, and SC70 packaging.
ADM803LAKSZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
ADM803LAKSZ-REEL FAQ
1.How can I place an order for ADM803LAKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM803LAKSZ-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 ADM803LAKSZ-REEL reliable?
The price and inventory of ADM803LAKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM803LAKSZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM803LAKSZ-REEL?
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4.How is shipping managed for ADM803LAKSZ-REEL?
ADM803LAKSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM803LAKSZ-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 ADM803LAKSZ-REEL?
For technical support, including ADM803LAKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM803LAKSZ-REEL requirements.
6.How does Aetrix verify that ADM803LAKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM803LAKSZ-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 ADM803LAKSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM803LAKSZ-REEL?
All ADM803LAKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM803LAKSZ-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 ADM803LAKSZ-REEL part is unused and in its original packaging.
Return procedure for ADM803LAKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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