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Analog Devices Inc. ADM803SAKSZ-REEL
- Part No.:
- ADM803SAKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM803SAKSZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:62,216
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Product details
Overview
ADM803SAKSZ-REEL from Analog Devices is a microprocessor supervisory circuit with open-drain active-low RESET output, 2.93 V reset threshold, and 240 ms typical power-on reset timeout. It operates from 1.0 V to 5.5 V supply, consumes 17 μA typical current, and functions down to VCC = 1 V - designed for reliable reset assertion in brownout and power-up conditions in embedded microcontroller systems.
For engineers reviewing the ADM803SAKSZ-REEL datasheet, ADM803SAKSZ-REEL pinout, ADM803SAKSZ-REEL application, or ADM803SAKSZ-REEL equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), SC70-3 package footprint, open-drain output requiring external pull-up, and guaranteed operation across industrial and extended temperature ranges.
Technical Context
The ADM803SAKSZ-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reference circuit maintains stable threshold detection even during fast VCC transients, enabling robust power-fail response without false triggering.
As part of the ADM803 family, it uses a fixed 2.93 V reset threshold (ADM8xxS variant) and features open-drain RESET output - unlike push-pull ADM809/ADM810 variants - requiring external pull-up for logic-level compatibility with diverse host processors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±2.5% (−40°C to +125°C); ensures reliable reset assertion before microprocessor VDD drops below operational minimum. |
| Supply Voltage Range | 1.0 V to 5.5 V; supports operation during deep brownout and enables use with 1.2 V–5 V logic domains. |
| Quiescent Current | 17 μA typical at VCC < 3.6 V; minimizes battery drain in portable and always-on embedded systems. |
| Reset Timeout | 240 ms typical after VCC rises above threshold; holds processor in reset long enough for clock stabilization and memory initialization. |
| Output Type | Open-drain active-low RESET; allows wired-OR configuration and level-shifting via external pull-up resistor. |
| Operating Temperature | −40°C to +125°C; qualified for automotive under-hood, industrial control, and high-reliability embedded applications. |
| VCC Monitoring Down To | 1 V; guarantees valid reset signal integrity even as supply collapses, preventing undefined processor states. |
Pinout & Package
ADM803SAKSZ-REEL is housed in a 3-lead SC70 (KS-3) package - 2.00 mm × 1.25 mm × 0.9 mm body, 0.65 mm lead pitch - optimized for space-constrained PCB layouts.
| 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 host VCC or logic rail for proper logic-high level. |
| 3 | VCC | Monitored supply input; connects to the voltage rail being supervised (e.g., 3.3 V microcontroller core or I/O supply). |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.93 V with ±2.5% tolerance over full temperature range - eliminates need for external trimming in production calibration. |
| Glitch-immune comparator | Immune to transients ≤100 µs duration at up to 100 mV overdrive - prevents spurious resets during switching noise or ESD events. |
| Low-voltage operation | Valid RESET assertion down to VCC = 1.0 V - ensures deterministic reset behavior during catastrophic supply collapse. |
| Extended temperature grade | Qualified from −40°C to +125°C - suitable for engine control units, motor drives, and industrial PLCs without derating. |
| Ultra-low quiescent current | 17 μA typical - extends battery life in coin-cell-powered IoT sensors and wearable devices beyond 10 years. |
Applications
| Industrial Motor Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 3.3 V MCU supply in a CAN-connected motor drive where voltage sags occur during high-current commutation. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET until 3.3 V rail stabilizes post-sag, with 240 ms timeout ensuring firmware reload completes. Use Value: Prevents runaway motor operation by guaranteeing hard reset on undervoltage - critical for functional safety compliance (ISO 26262 ASIL-B). |
Use Scenario: Embedded in door module PCB to supervise 5 V power rail feeding LIN transceivers and window motor drivers. IC Role / Device Role / Timing Role: Detects brownout during vehicle cranking (battery dip to 6–9 V) and asserts RESET to prevent EEPROM corruption during power recovery. Use Value: Enables fail-safe state retention and controlled reinitialization - meets OEM requirements for zero-reset-failure field returns. |
| Medical Infusion Pump | Smart Energy Meter |
|
Use Scenario: Powers ARM Cortex-M4 MCU in battery-backed infusion pump where supply transitions between AC adapter and Li-ion battery. IC Role / Device Role / Timing Role: Provides seamless reset handover during supply switchover, with 1 V minimum VCC operation preserving reset validity during battery depletion. Use Value: Eliminates risk of uncommanded dose delivery by enforcing deterministic MCU reset across all power sources. |
Use Scenario: Supervises 3.3 V RTC and metrology IC supply in Class 0.5S electricity meter exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Maintains accurate 2.93 V threshold across −40°C to +125°C, ensuring reset occurs only when supply falls outside metrology-grade operating window. Use Value: Guarantees data integrity during grid instability events while meeting IEC 62053-21 long-term reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 2.93 V threshold, SOT-23-3 package, push-pull output, 1.2 μA max supply current - lower IQ but no open-drain flexibility. | Requires redesign for pull-up removal; unsuitable for wired-OR reset buses or level translation. | Select when lowest possible quiescent current is critical and push-pull interface suffices. |
| TPS3808G12DBVR | 1.2 V threshold (not 2.93 V), adjustable via external resistor, 1.8 μA IQ, SOT-23-6 - programmable but larger footprint and different function scope. | Cannot replace ADM803SAKSZ-REEL without circuit modification; intended for custom threshold designs, not drop-in 2.93 V monitoring. | Choose only if design requires tunable reset voltage and board space permits 6-pin package. |
Compared with MAX809SEUR+T and TPS3808G12DBVR, the ADM803SAKSZ-REEL uniquely combines fixed 2.93 V accuracy, SC70-3 size, open-drain output, and guaranteed 1 V operation - making it the only option for space-limited, multi-rail, or wired-OR reset architectures requiring precise undervoltage detection.
Availability
ADM803SAKSZ-REEL is available at Aetrix Electronics and suitable for industrial motor controllers, automotive body electronics, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature and long product lifecycles.
Supply support for ADM803SAKSZ-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 was engineered specifically for deterministic power-on and brownout reset in resource-constrained microprocessor systems - prioritizing low IQ, small footprint, and wide-temperature reliability over programmability or feature expansion.
FAQ
What is the exact reset threshold voltage of the ADM803SAKSZ-REEL?
The ADM803SAKSZ-REEL has a nominal reset threshold of 2.93 V, with tolerance of ±2.5% over the full −40°C to +125°C operating range. This value is confirmed in Table 3 and Specifications section of the ADM803/ADM809/ADM810 Rev. I datasheet, corresponding to the "S" variant designation in the ordering guide.
Does the ADM803SAKSZ-REEL require an external pull-up resistor on the RESET pin?
Yes, the ADM803SAKSZ-REEL features an open-drain RESET output and requires an external pull-up resistor - typically 4.7 kΩ to 10 kΩ - connected between the RESET pin and the target logic rail (e.g., 3.3 V or 5 V). This is explicitly stated in the General Description and Pin Function Descriptions sections of the datasheet.
What is the minimum supply voltage at which the ADM803SAKSZ-REEL guarantees valid RESET assertion?
The ADM803SAKSZ-REEL guarantees valid RESET assertion down to VCC = 1.0 V, as specified in the Absolute Maximum Ratings and General Description. This ensures the reset signal remains active and well-defined even during severe brownout conditions, preventing undefined microprocessor states.
Is the ADM803SAKSZ-REEL RoHS compliant and lead-free?
Yes, the "Z" suffix in ADM803SAKSZ-REEL indicates RoHS compliance per the Ordering Guide footnote: "Z = RoHS Compliant Part." The device meets EU Directive 2011/65/EU and is manufactured with lead-free terminations and halogen-free molding compounds.
What package type and dimensions does the ADM803SAKSZ-REEL use?
The ADM803SAKSZ-REEL uses the 3-lead SC70 package (JEDEC KS-3), measuring 2.00 mm × 1.25 mm × 0.9 mm with 0.65 mm lead pitch. Outline dimensions are documented in Figure 15 of the datasheet, and the package option is listed as "KS-3" in the Ordering Guide.
ADM803SAKSZ-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:
- 2.93V
- 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
ADM803SAKSZ-REEL FAQ
1.How can I place an order for ADM803SAKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM803SAKSZ-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 ADM803SAKSZ-REEL reliable?
The price and inventory of ADM803SAKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM803SAKSZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM803SAKSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM803SAKSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM803SAKSZ-REEL?
ADM803SAKSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM803SAKSZ-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 ADM803SAKSZ-REEL?
For technical support, including ADM803SAKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM803SAKSZ-REEL requirements.
6.How does Aetrix verify that ADM803SAKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM803SAKSZ-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 ADM803SAKSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM803SAKSZ-REEL?
All ADM803SAKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM803SAKSZ-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 ADM803SAKSZ-REEL part is unused and in its original packaging.
Return procedure for ADM803SAKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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